<?php
/**
* File contains all the administration image manipulation functions.
*
* @package WordPress
* @subpackage Administration
*/
/**
* Crops an image to a given size.
*
* @since 2.1.0
*
* @param string|int $src The source file or Attachment ID.
* @param int $src_x The start x position to crop from.
* @param int $src_y The start y position to crop from.
* @param int $src_w The width to crop.
* @param int $src_h The height to crop.
* @param int $dst_w The destination width.
* @param int $dst_h The destination height.
* @param bool|false $src_abs Optional. If the source crop points are absolute.
* @param string|false $dst_file Optional. The destination file to write to.
* @return string|WP_Error New filepath on success, WP_Error on failure.
*/
function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
$src_file = $src;
if ( is_numeric( $src ) ) { // Handle int as attachment ID.
$src_file = get_attached_file( $src );
if ( ! file_exists( $src_file ) ) {
/*
* If the file doesn't exist, attempt a URL fopen on the src link.
* This can occur with certain file replication plugins.
*/
$src = _load_image_to_edit_path( $src, 'full' );
} else {
$src = $src_file;
}
}
$editor = wp_get_image_editor( $src );
if ( is_wp_error( $editor ) ) {
return $editor;
}
$src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs );
if ( is_wp_error( $src ) ) {
return $src;
}
if ( ! $dst_file ) {
$dst_file = str_replace( wp_basename( $src_file ), 'cropped-' . wp_basename( $src_file ), $src_file );
}
/*
* The directory containing the original file may no longer exist when
* using a replication plugin.
*/
wp_mkdir_p( dirname( $dst_file ) );
$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), wp_basename( $dst_file ) );
$result = $editor->save( $dst_file );
if ( is_wp_error( $result ) ) {
return $result;
}
if ( ! empty( $result['path'] ) ) {
return $result['path'];
}
return $dst_file;
}
/**
* Compare the existing image sub-sizes (as saved in the attachment meta)
* to the currently registered image sub-sizes, and return the difference.
*
* Registered sub-sizes that are larger than the image are skipped.
*
* @since 5.3.0
*
* @param int $attachment_id The image attachment post ID.
* @return array[] Associative array of arrays of image sub-size information for
* missing image sizes, keyed by image size name.
*/
function wp_get_missing_image_subsizes( $attachment_id ) {
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return array();
}
$registered_sizes = wp_get_registered_image_subsizes();
$image_meta = wp_get_attachment_metadata( $attachment_id );
// Meta error?
if ( empty( $image_meta ) ) {
return $registered_sizes;
}
// Use the originally uploaded image dimensions as full_width and full_height.
if ( ! empty( $image_meta['original_image'] ) ) {
$image_file = wp_get_original_image_path( $attachment_id );
$imagesize = wp_getimagesize( $image_file );
}
if ( ! empty( $imagesize ) ) {
$full_width = $imagesize[0];
$full_height = $imagesize[1];
} else {
$full_width = (int) $image_meta['width'];
$full_height = (int) $image_meta['height'];
}
$possible_sizes = array();
// Skip registered sizes that are too large for the uploaded image.
foreach ( $registered_sizes as $size_name => $size_data ) {
if ( image_resize_dimensions( $full_width, $full_height, $size_data['width'], $size_data['height'], $size_data['crop'] ) ) {
$possible_sizes[ $size_name ] = $size_data;
}
}
if ( empty( $image_meta['sizes'] ) ) {
$image_meta['sizes'] = array();
}
/*
* Remove sizes that already exist. Only checks for matching "size names".
* It is possible that the dimensions for a particular size name have changed.
* For example the user has changed the values on the Settings -> Media screen.
* However we keep the old sub-sizes with the previous dimensions
* as the image may have been used in an older post.
*/
$missing_sizes = array_diff_key( $possible_sizes, $image_meta['sizes'] );
/**
* Filters the array of missing image sub-sizes for an uploaded image.
*
* @since 5.3.0
*
* @param array[] $missing_sizes Associative array of arrays of image sub-size information for
* missing image sizes, keyed by image size name.
* @param array $image_meta The image meta data.
* @param int $attachment_id The image attachment post ID.
*/
return apply_filters( 'wp_get_missing_image_subsizes', $missing_sizes, $image_meta, $attachment_id );
}
/**
* If any of the currently registered image sub-sizes are missing,
* create them and update the image meta data.
*
* @since 5.3.0
*
* @param int $attachment_id The image attachment post ID.
* @return array|WP_Error The updated image meta data array or WP_Error object
* if both the image meta and the attached file are missing.
*/
function wp_update_image_subsizes( $attachment_id ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
$image_file = wp_get_original_image_path( $attachment_id );
if ( empty( $image_meta ) || ! is_array( $image_meta ) ) {
/*
* Previously failed upload?
* If there is an uploaded file, make all sub-sizes and generate all of the attachment meta.
*/
if ( ! empty( $image_file ) ) {
$image_meta = wp_create_image_subsizes( $image_file, $attachment_id );
} else {
return new WP_Error( 'invalid_attachment', __( 'The attached file cannot be found.' ) );
}
} else {
$missing_sizes = wp_get_missing_image_subsizes( $attachment_id );
if ( empty( $missing_sizes ) ) {
return $image_meta;
}
// This also updates the image meta.
$image_meta = _wp_make_subsizes( $missing_sizes, $image_file, $image_meta, $attachment_id );
}
/** This filter is documented in wp-admin/includes/image.php */
$image_meta = apply_filters( 'wp_generate_attachment_metadata', $image_meta, $attachment_id, 'update' );
// Save the updated metadata.
wp_update_attachment_metadata( $attachment_id, $image_meta );
return $image_meta;
}
/**
* Updates the attached file and image meta data when the original image was edited.
*
* @since 5.3.0
* @since 6.0.0 The `$filesize` value was added to the returned array.
* @access private
*
* @param array $saved_data The data returned from WP_Image_Editor after successfully saving an image.
* @param string $original_file Path to the original file.
* @param array $image_meta The image meta data.
* @param int $attachment_id The attachment post ID.
* @return array The updated image meta data.
*/
function _wp_image_meta_replace_original( $saved_data, $original_file, $image_meta, $attachment_id ) {
$new_file = $saved_data['path'];
// Update the attached file meta.
update_attached_file( $attachment_id, $new_file );
// Width and height of the new image.
$image_meta['width'] = $saved_data['width'];
$image_meta['height'] = $saved_data['height'];
// Make the file path relative to the upload dir.
$image_meta['file'] = _wp_relative_upload_path( $new_file );
// Add image file size.
$image_meta['filesize'] = wp_filesize( $new_file );
// Store the original image file name in image_meta.
$image_meta['original_image'] = wp_basename( $original_file );
return $image_meta;
}
/**
* Creates image sub-sizes, adds the new data to the image meta `sizes` array, and updates the image metadata.
*
* Intended for use after an image is uploaded. Saves/updates the image metadata after each
* sub-size is created. If there was an error, it is added to the returned image metadata array.
*
* @since 5.3.0
*
* @param string $file Full path to the image file.
* @param int $attachment_id Attachment ID to process.
* @return array The image attachment meta data.
*/
function wp_create_image_subsizes( $file, $attachment_id ) {
$imagesize = wp_getimagesize( $file );
if ( empty( $imagesize ) ) {
// File is not an image.
return array();
}
// Default image meta.
$image_meta = array(
'width' => $imagesize[0],
'height' => $imagesize[1],
'file' => _wp_relative_upload_path( $file ),
'filesize' => wp_filesize( $file ),
'sizes' => array(),
);
// Fetch additional metadata from EXIF/IPTC.
$exif_meta = wp_read_image_metadata( $file );
if ( $exif_meta ) {
$image_meta['image_meta'] = $exif_meta;
}
/**
* Filters the "BIG image" threshold value.
*
* If the original image width or height is above the threshold, it will be scaled down. The threshold is
* used as max width and max height. The scaled down image will be used as the largest available size, including
* the `_wp_attached_file` post meta value.
*
* Returning `false` from the filter callback will disable the scaling.
*
* @since 5.3.0
*
* @param int $threshold The threshold value in pixels. Default 2560.
* @param array $imagesize {
* Indexed array of the image width and height in pixels.
*
* @type int $0 The image width.
* @type int $1 The image height.
* }
* @param string $file Full path to the uploaded image file.
* @param int $attachment_id Attachment post ID.
*/
$threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id );
/*
* If the original image's dimensions are over the threshold,
* scale the image and use it as the "full" size.
*/
$scale_down = false;
$convert = false;
if ( $threshold && ( $image_meta['width'] > $threshold || $image_meta['height'] > $threshold ) ) {
// The image will be converted if needed on saving.
$scale_down = true;
} else {
// The image may need to be converted regardless of its dimensions.
$output_format = wp_get_image_editor_output_format( $file, $imagesize['mime'] );
if (
is_array( $output_format ) &&
array_key_exists( $imagesize['mime'], $output_format ) &&
$output_format[ $imagesize['mime'] ] !== $imagesize['mime']
) {
$convert = true;
}
}
if ( $scale_down || $convert ) {
$editor = wp_get_image_editor( $file );
if ( is_wp_error( $editor ) ) {
// This image cannot be edited.
return $image_meta;
}
if ( $scale_down ) {
// Resize the image. This will also convet it if needed.
$resized = $editor->resize( $threshold, $threshold );
} elseif ( $convert ) {
// The image will be converted (if possible) when saved.
$resized = true;
}
$rotated = null;
// If there is EXIF data, rotate according to EXIF Orientation.
if ( ! is_wp_error( $resized ) && is_array( $exif_meta ) ) {
$resized = $editor->maybe_exif_rotate();
$rotated = $resized; // bool true or WP_Error
}
if ( ! is_wp_error( $resized ) ) {
/*
* Append "-scaled" to the image file name. It will look like "my_image-scaled.jpg".
* This doesn't affect the sub-sizes names as they are generated from the original image (for best quality).
*/
if ( $scale_down ) {
$saved = $editor->save( $editor->generate_filename( 'scaled' ) );
} elseif ( $convert ) {
// Pass an empty string to avoid adding a suffix to converted file names.
$saved = $editor->save( $editor->generate_filename( '' ) );
} else {
$saved = $editor->save();
}
if ( ! is_wp_error( $saved ) ) {
$image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
// If the image was rotated update the stored EXIF data.
if ( true === $rotated && ! empty( $image_meta['image_meta']['orientation'] ) ) {
$image_meta['image_meta']['orientation'] = 1;
}
} else {
// TODO: Log errors.
}
} else {
// TODO: Log errors.
}
} elseif ( ! empty( $exif_meta['orientation'] ) && 1 !== (int) $exif_meta['orientation'] ) {
// Rotate the whole original image if there is EXIF data and "orientation" is not 1.
$editor = wp_get_image_editor( $file );
if ( is_wp_error( $editor ) ) {
// This image cannot be edited.
return $image_meta;
}
// Rotate the image.
$rotated = $editor->maybe_exif_rotate();
if ( true === $rotated ) {
// Append `-rotated` to the image file name.
$saved = $editor->save( $editor->generate_filename( 'rotated' ) );
if ( ! is_wp_error( $saved ) ) {
$image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
// Update the stored EXIF data.
if ( ! empty( $image_meta['image_meta']['orientation'] ) ) {
$image_meta['image_meta']['orientation'] = 1;
}
} else {
// TODO: Log errors.
}
}
}
/*
* Initial save of the new metadata.
* At this point the file was uploaded and moved to the uploads directory
* but the image sub-sizes haven't been created yet and the `sizes` array is empty.
*/
wp_update_attachment_metadata( $attachment_id, $image_meta );
$new_sizes = wp_get_registered_image_subsizes();
/**
* Filters the image sizes automatically generated when uploading an image.
*
* @since 2.9.0
* @since 4.4.0 Added the `$image_meta` argument.
* @since 5.3.0 Added the `$attachment_id` argument.
*
* @param array $new_sizes Associative array of image sizes to be created.
* @param array $image_meta The image meta data: width, height, file, sizes, etc.
* @param int $attachment_id The attachment post ID for the image.
*/
$new_sizes = apply_filters( 'intermediate_image_sizes_advanced', $new_sizes, $image_meta, $attachment_id );
return _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id );
}
/**
* Low-level function to create image sub-sizes.
*
* Updates the image meta after each sub-size is created.
* Errors are stored in the returned image metadata array.
*
* @since 5.3.0
* @access private
*
* @param array $new_sizes Array defining what sizes to create.
* @param string $file Full path to the image file.
* @param array $image_meta The attachment meta data array.
* @param int $attachment_id Attachment ID to process.
* @return array The attachment meta data with updated `sizes` array. Includes an array of errors encountered while resizing.
*/
function _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id ) {
if ( empty( $image_meta ) || ! is_array( $image_meta ) ) {
// Not an image attachment.
return array();
}
// Check if any of the new sizes already exist.
if ( isset( $image_meta['sizes'] ) && is_array( $image_meta['sizes'] ) ) {
foreach ( $image_meta['sizes'] as $size_name => $size_meta ) {
/*
* Only checks "size name" so we don't override existing images even if the dimensions
* don't match the currently defined size with the same name.
* To change the behavior, unset changed/mismatched sizes in the `sizes` array in image meta.
*/
if ( array_key_exists( $size_name, $new_sizes ) ) {
unset( $new_sizes[ $size_name ] );
}
}
} else {
$image_meta['sizes'] = array();
}
if ( empty( $new_sizes ) ) {
// Nothing to do...
return $image_meta;
}
/*
* Sort the image sub-sizes in order of priority when creating them.
* This ensures there is an appropriate sub-size the user can access immediately
* even when there was an error and not all sub-sizes were created.
*/
$priority = array(
'medium' => null,
'large' => null,
'thumbnail' => null,
'medium_large' => null,
);
$new_sizes = array_filter( array_merge( $priority, $new_sizes ) );
$editor = wp_get_image_editor( $file );
if ( is_wp_error( $editor ) ) {
// The image cannot be edited.
return $image_meta;
}
// If stored EXIF data exists, rotate the source image before creating sub-sizes.
if ( ! empty( $image_meta['image_meta'] ) ) {
$rotated = $editor->maybe_exif_rotate();
if ( is_wp_error( $rotated ) ) {
// TODO: Log errors.
}
}
if ( method_exists( $editor, 'make_subsize' ) ) {
foreach ( $new_sizes as $new_size_name => $new_size_data ) {
$new_size_meta = $editor->make_subsize( $new_size_data );
if ( is_wp_error( $new_size_meta ) ) {
// TODO: Log errors.
} else {
// Save the size meta value.
$image_meta['sizes'][ $new_size_name ] = $new_size_meta;
wp_update_attachment_metadata( $attachment_id, $image_meta );
}
}
} else {
// Fall back to `$editor->multi_resize()`.
$created_sizes = $editor->multi_resize( $new_sizes );
if ( ! empty( $created_sizes ) ) {
$image_meta['sizes'] = array_merge( $image_meta['sizes'], $created_sizes );
wp_update_attachment_metadata( $attachment_id, $image_meta );
}
}
return $image_meta;
}
/**
* Copy parent attachment properties to newly cropped image.
*
* @since 6.5.0
*
* @param string $cropped Path to the cropped image file.
* @param int $parent_attachment_id Parent file Attachment ID.
* @param string $context Control calling the function.
* @return array Properties of attachment.
*/
function wp_copy_parent_attachment_properties( $cropped, $parent_attachment_id, $context = '' ) {
$parent = get_post( $parent_attachment_id );
$parent_url = wp_get_attachment_url( $parent->ID );
$parent_basename = wp_basename( $parent_url );
$url = str_replace( wp_basename( $parent_url ), wp_basename( $cropped ), $parent_url );
$size = wp_getimagesize( $cropped );
$image_type = $size ? $size['mime'] : 'image/jpeg';
$sanitized_post_title = sanitize_file_name( $parent->post_title );
$use_original_title = (
( '' !== trim( $parent->post_title ) ) &&
/*
* Check if the original image has a title other than the "filename" default,
* meaning the image had a title when originally uploaded or its title was edited.
*/
( $parent_basename !== $sanitized_post_title ) &&
( pathinfo( $parent_basename, PATHINFO_FILENAME ) !== $sanitized_post_title )
);
$use_original_description = ( '' !== trim( $parent->post_content ) );
$attachment = array(
'post_title' => $use_original_title ? $parent->post_title : wp_basename( $cropped ),
'post_content' => $use_original_description ? $parent->post_content : $url,
'post_mime_type' => $image_type,
'guid' => $url,
'context' => $context,
);
// Copy the image caption attribute (post_excerpt field) from the original image.
if ( '' !== trim( $parent->post_excerpt ) ) {
$attachment['post_excerpt'] = $parent->post_excerpt;
}
// Copy the image alt text attribute from the original image.
if ( '' !== trim( $parent->_wp_attachment_image_alt ) ) {
$attachment['meta_input'] = array(
'_wp_attachment_image_alt' => wp_slash( $parent->_wp_attachment_image_alt ),
);
}
$attachment['post_parent'] = $parent_attachment_id;
return $attachment;
}
/**
* Generates attachment meta data and create image sub-sizes for images.
*
* @since 2.1.0
* @since 6.0.0 The `$filesize` value was added to the returned array.
* @since 6.7.0 The 'image/heic' mime type is supported.
*
* @param int $attachment_id Attachment ID to process.
* @param string $file Filepath of the attached image.
* @return array Metadata for attachment.
*/
function wp_generate_attachment_metadata( $attachment_id, $file ) {
$attachment = get_post( $attachment_id );
$metadata = array();
$support = false;
$mime_type = get_post_mime_type( $attachment );
if ( 'image/heic' === $mime_type || ( preg_match( '!^image/!', $mime_type ) && file_is_displayable_image( $file ) ) ) {
// Make thumbnails and other intermediate sizes.
$metadata = wp_create_image_subsizes( $file, $attachment_id );
} elseif ( wp_attachment_is( 'video', $attachment ) ) {
$metadata = wp_read_video_metadata( $file );
$support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) || post_type_supports( 'attachment:video', 'thumbnail' );
} elseif ( wp_attachment_is( 'audio', $attachment ) ) {
$metadata = wp_read_audio_metadata( $file );
$support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) || post_type_supports( 'attachment:audio', 'thumbnail' );
}
/*
* wp_read_video_metadata() and wp_read_audio_metadata() return `false`
* if the attachment does not exist in the local filesystem,
* so make sure to convert the value to an array.
*/
if ( ! is_array( $metadata ) ) {
$metadata = array();
}
if ( $support && ! empty( $metadata['image']['data'] ) ) {
// Check for existing cover.
$hash = md5( $metadata['image']['data'] );
$posts = get_posts(
array(
'fields' => 'ids',
'post_type' => 'attachment',
'post_mime_type' => $metadata['image']['mime'],
'post_status' => 'inherit',
'posts_per_page' => 1,
'meta_key' => '_cover_hash',
'meta_value' => $hash,
)
);
$exists = reset( $posts );
if ( ! empty( $exists ) ) {
update_post_meta( $attachment_id, '_thumbnail_id', $exists );
} else {
$ext = '.jpg';
switch ( $metadata['image']['mime'] ) {
case 'image/gif':
$ext = '.gif';
break;
case 'image/png':
$ext = '.png';
break;
case 'image/webp':
$ext = '.webp';
break;
}
$basename = str_replace( '.', '-', wp_basename( $file ) ) . '-image' . $ext;
$uploaded = wp_upload_bits( $basename, '', $metadata['image']['data'] );
if ( false === $uploaded['error'] ) {
$image_attachment = array(
'post_mime_type' => $metadata['image']['mime'],
'post_type' => 'attachment',
'post_content' => '',
);
/**
* Filters the parameters for the attachment thumbnail creation.
*
* @since 3.9.0
*
* @param array $image_attachment An array of parameters to create the thumbnail.
* @param array $metadata Current attachment metadata.
* @param array $uploaded {
* Information about the newly-uploaded file.
*
* @type string $file Filename of the newly-uploaded file.
* @type string $url URL of the uploaded file.
* @type string $type File type.
* }
*/
$image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded );
$sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] );
add_post_meta( $sub_attachment_id, '_cover_hash', $hash );
$attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );
wp_update_attachment_metadata( $sub_attachment_id, $attach_data );
update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );
}
}
} elseif ( 'application/pdf' === $mime_type ) {
// Try to create image thumbnails for PDFs.
$fallback_sizes = array(
'thumbnail',
'medium',
'large',
);
/**
* Filters the image sizes generated for non-image mime types.
*
* @since 4.7.0
*
* @param string[] $fallback_sizes An array of image size names.
* @param array $metadata Current attachment metadata.
*/
$fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata );
$registered_sizes = wp_get_registered_image_subsizes();
$merged_sizes = array_intersect_key( $registered_sizes, array_flip( $fallback_sizes ) );
// Force thumbnails to be soft crops.
if ( isset( $merged_sizes['thumbnail'] ) && is_array( $merged_sizes['thumbnail'] ) ) {
$merged_sizes['thumbnail']['crop'] = false;
}
// Only load PDFs in an image editor if we're processing sizes.
if ( ! empty( $merged_sizes ) ) {
$editor = wp_get_image_editor( $file );
if ( ! is_wp_error( $editor ) ) { // No support for this type of file.
/*
* PDFs may have the same file filename as JPEGs.
* Ensure the PDF preview image does not overwrite any JPEG images that already exist.
*/
$dirname = dirname( $file ) . '/';
$ext = '.' . pathinfo( $file, PATHINFO_EXTENSION );
$preview_file = $dirname . wp_unique_filename( $dirname, wp_basename( $file, $ext ) . '-pdf.jpg' );
$uploaded = $editor->save( $preview_file, 'image/jpeg' );
unset( $editor );
// Resize based on the full size image, rather than the source.
if ( ! is_wp_error( $uploaded ) ) {
$image_file = $uploaded['path'];
unset( $uploaded['path'] );
$metadata['sizes'] = array(
'full' => $uploaded,
);
// Save the meta data before any image post-processing errors could happen.
wp_update_attachment_metadata( $attachment_id, $metadata );
// Create sub-sizes saving the image meta after each.
$metadata = _wp_make_subsizes( $merged_sizes, $image_file, $metadata, $attachment_id );
}
}
}
}
// Remove the blob of binary data from the array.
unset( $metadata['image']['data'] );
// Capture file size for cases where it has not been captured yet, such as PDFs.
if ( ! isset( $metadata['filesize'] ) && file_exists( $file ) ) {
$metadata['filesize'] = wp_filesize( $file );
}
/**
* Filters the generated attachment meta data.
*
* @since 2.1.0
* @since 5.3.0 The `$context` parameter was added.
*
* @param array $metadata An array of attachment meta data.
* @param int $attachment_id Current attachment ID.
* @param string $context Additional context. Can be 'create' when metadata was initially created for new attachment
* or 'update' when the metadata was updated.
*/
return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id, 'create' );
}
/**
* Converts a fraction string to a decimal.
*
* @since 2.5.0
*
* @param string $str Fraction string.
* @return int|float Returns calculated fraction or integer 0 on invalid input.
*/
function wp_exif_frac2dec( $str ) {
if ( ! is_scalar( $str ) || is_bool( $str ) ) {
return 0;
}
if ( ! is_string( $str ) ) {
return $str; // This can only be an integer or float, so this is fine.
}
// Fractions passed as a string must contain a single `/`.
if ( substr_count( $str, '/' ) !== 1 ) {
if ( is_numeric( $str ) ) {
return (float) $str;
}
return 0;
}
list( $numerator, $denominator ) = explode( '/', $str );
// Both the numerator and the denominator must be numbers.
if ( ! is_numeric( $numerator ) || ! is_numeric( $denominator ) ) {
return 0;
}
// The denominator must not be zero.
if ( 0 == $denominator ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual -- Deliberate loose comparison.
return 0;
}
return $numerator / $denominator;
}
/**
* Converts the exif date format to a unix timestamp.
*
* @since 2.5.0
*
* @param string $str A date string expected to be in Exif format (Y:m:d H:i:s).
* @return int|false The unix timestamp, or false on failure.
*/
function wp_exif_date2ts( $str ) {
list( $date, $time ) = explode( ' ', trim( $str ) );
list( $y, $m, $d ) = explode( ':', $date );
return strtotime( "{$y}-{$m}-{$d} {$time}" );
}
/**
* Gets extended image metadata, exif or iptc as available.
*
* Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso
* created_timestamp, focal_length, shutter_speed, and title.
*
* The IPTC metadata that is retrieved is APP13, credit, byline, created date
* and time, caption, copyright, alt, and title. Also includes FNumber, Model,
* DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.
*
* @todo Try other exif libraries if available.
* @since 2.5.0
*
* @param string $file
* @return array|false Image metadata array on success, false on failure.
*/
function wp_read_image_metadata( $file ) {
if ( ! file_exists( $file ) ) {
return false;
}
$image_size = wp_getimagesize( $file );
if ( false === $image_size ) {
return false;
}
list( , , $image_type ) = $image_size;
/*
* EXIF contains a bunch of data we'll probably never need formatted in ways
* that are difficult to use. We'll normalize it and just extract the fields
* that are likely to be useful. Fractions and numbers are converted to
* floats, dates to unix timestamps, and everything else to strings.
*/
$meta = array(
'aperture' => 0,
'credit' => '',
'camera' => '',
'caption' => '',
'created_timestamp' => 0,
'copyright' => '',
'focal_length' => 0,
'iso' => 0,
'shutter_speed' => 0,
'title' => '',
'orientation' => 0,
'keywords' => array(),
'alt' => '',
);
$iptc = array();
$info = array();
/*
* Read IPTC first, since it might contain data not available in exif such
* as caption, description etc.
*/
if ( is_callable( 'iptcparse' ) ) {
wp_getimagesize( $file, $info );
if ( ! empty( $info['APP13'] ) ) {
// Don't silence errors when in debug mode, unless running unit tests.
if ( defined( 'WP_DEBUG' ) && WP_DEBUG
&& ! defined( 'WP_RUN_CORE_TESTS' )
) {
$iptc = iptcparse( $info['APP13'] );
} else {
// Silencing notice and warning is intentional. See https://core.trac.wordpress.org/ticket/42480
$iptc = @iptcparse( $info['APP13'] );
}
if ( ! is_array( $iptc ) ) {
$iptc = array();
}
// Headline, "A brief synopsis of the caption".
if ( ! empty( $iptc['2#105'][0] ) ) {
$meta['title'] = trim( $iptc['2#105'][0] );
/*
* Title, "Many use the Title field to store the filename of the image,
* though the field may be used in many ways".
*/
} elseif ( ! empty( $iptc['2#005'][0] ) ) {
$meta['title'] = trim( $iptc['2#005'][0] );
}
if ( ! empty( $iptc['2#120'][0] ) ) { // Description / legacy caption.
$caption = trim( $iptc['2#120'][0] );
mbstring_binary_safe_encoding();
$caption_length = strlen( $caption );
reset_mbstring_encoding();
if ( empty( $meta['title'] ) && $caption_length < 80 ) {
// Assume the title is stored in 2:120 if it's short.
$meta['title'] = $caption;
}
$meta['caption'] = $caption;
}
if ( ! empty( $iptc['2#110'][0] ) ) { // Credit.
$meta['credit'] = trim( $iptc['2#110'][0] );
} elseif ( ! empty( $iptc['2#080'][0] ) ) { // Creator / legacy byline.
$meta['credit'] = trim( $iptc['2#080'][0] );
}
if ( ! empty( $iptc['2#055'][0] ) && ! empty( $iptc['2#060'][0] ) ) { // Created date and time.
$meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] );
}
if ( ! empty( $iptc['2#116'][0] ) ) { // Copyright.
$meta['copyright'] = trim( $iptc['2#116'][0] );
}
if ( ! empty( $iptc['2#025'][0] ) ) { // Keywords array.
$meta['keywords'] = array_values( $iptc['2#025'] );
}
}
}
$meta['alt'] = wp_get_image_alttext( $file );
$exif = array();
/**
* Filters the image types to check for exif data.
*
* @since 2.5.0
*
* @param int[] $image_types Array of image types to check for exif data. Each value
* is usually one of the `IMAGETYPE_*` constants.
*/
$exif_image_types = apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) );
if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types, true ) ) {
// Don't silence errors when in debug mode, unless running unit tests.
if ( defined( 'WP_DEBUG' ) && WP_DEBUG
&& ! defined( 'WP_RUN_CORE_TESTS' )
) {
$exif = exif_read_data( $file );
} else {
// Silencing notice and warning is intentional. See https://core.trac.wordpress.org/ticket/42480
$exif = @exif_read_data( $file );
}
if ( ! is_array( $exif ) ) {
$exif = array();
}
$exif_description = '';
$exif_usercomment = '';
if ( ! empty( $exif['ImageDescription'] ) ) {
$exif_description = trim( $exif['ImageDescription'] );
}
if ( ! empty( $exif['COMPUTED']['UserComment'] ) ) {
$exif_usercomment = trim( $exif['COMPUTED']['UserComment'] );
}
if ( $exif_description ) {
mbstring_binary_safe_encoding();
$description_length = strlen( $exif_description );
reset_mbstring_encoding();
if ( empty( $meta['title'] ) && $description_length < 80 ) {
// Assume the title is stored in ImageDescription.
$meta['title'] = $exif_description;
}
// If both user comments and description are present.
if ( empty( $meta['caption'] ) && $exif_usercomment ) {
if ( ! empty( $meta['title'] ) && $exif_description === $meta['title'] ) {
$caption = $exif_usercomment;
} else {
if ( $exif_description === $exif_usercomment ) {
$caption = $exif_description;
} else {
$caption = trim( $exif_description . ' ' . $exif_usercomment );
}
}
$meta['caption'] = $caption;
}
if ( empty( $meta['caption'] ) && $exif_usercomment ) {
$meta['caption'] = $exif_usercomment;
}
if ( empty( $meta['caption'] ) ) {
$meta['caption'] = $exif_description;
}
} elseif ( empty( $meta['caption'] ) && $exif_usercomment ) {
$meta['caption'] = $exif_usercomment;
$description_length = strlen( $exif_usercomment );
if ( empty( $meta['title'] ) && $description_length < 80 ) {
$meta['title'] = trim( $exif_usercomment );
}
} elseif ( empty( $meta['caption'] ) && ! empty( $exif['Comments'] ) ) {
$meta['caption'] = trim( $exif['Comments'] );
}
if ( empty( $meta['credit'] ) ) {
if ( ! empty( $exif['Artist'] ) ) {
$meta['credit'] = trim( $exif['Artist'] );
} elseif ( ! empty( $exif['Author'] ) ) {
$meta['credit'] = trim( $exif['Author'] );
}
}
if ( empty( $meta['copyright'] ) && ! empty( $exif['Copyright'] ) ) {
$meta['copyright'] = trim( $exif['Copyright'] );
}
if ( ! empty( $exif['FNumber'] ) && is_scalar( $exif['FNumber'] ) ) {
$meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
}
if ( ! empty( $exif['Model'] ) ) {
$meta['camera'] = trim( $exif['Model'] );
}
if ( empty( $meta['created_timestamp'] ) && ! empty( $exif['DateTimeDigitized'] ) ) {
$meta['created_timestamp'] = wp_exif_date2ts( $exif['DateTimeDigitized'] );
}
if ( ! empty( $exif['FocalLength'] ) ) {
$meta['focal_length'] = (string) $exif['FocalLength'];
if ( is_scalar( $exif['FocalLength'] ) ) {
$meta['focal_length'] = (string) wp_exif_frac2dec( $exif['FocalLength'] );
}
}
if ( ! empty( $exif['ISOSpeedRatings'] ) ) {
$meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? reset( $exif['ISOSpeedRatings'] ) : $exif['ISOSpeedRatings'];
$meta['iso'] = trim( $meta['iso'] );
}
if ( ! empty( $exif['ExposureTime'] ) ) {
$meta['shutter_speed'] = (string) $exif['ExposureTime'];
if ( is_scalar( $exif['ExposureTime'] ) ) {
$meta['shutter_speed'] = (string) wp_exif_frac2dec( $exif['ExposureTime'] );
}
}
if ( ! empty( $exif['Orientation'] ) ) {
$meta['orientation'] = $exif['Orientation'];
}
}
foreach ( array( 'title', 'caption', 'credit', 'copyright', 'camera', 'iso' ) as $key ) {
if ( $meta[ $key ] && ! wp_is_valid_utf8( $meta[ $key ] ) ) {
$meta[ $key ] = utf8_encode( $meta[ $key ] );
}
}
foreach ( $meta['keywords'] as $key => $keyword ) {
if ( ! wp_is_valid_utf8( $keyword ) ) {
$meta['keywords'][ $key ] = utf8_encode( $keyword );
}
}
$meta = wp_kses_post_deep( $meta );
/**
* Filters the array of meta data read from an image's exif data.
*
* @since 2.5.0
* @since 4.4.0 The `$iptc` parameter was added.
* @since 5.0.0 The `$exif` parameter was added.
*
* @param array $meta Image meta data.
* @param string $file Path to image file.
* @param int $image_type Type of image, one of the `IMAGETYPE_XXX` constants.
* @param array $iptc IPTC data.
* @param array $exif EXIF data.
*/
return apply_filters( 'wp_read_image_metadata', $meta, $file, $image_type, $iptc, $exif );
}
/**
* Gets the alt text from image meta data.
*
* @since 7.0.0
*
* @param string $file File path to the image.
* @return string Embedded alternative text.
*/
function wp_get_image_alttext( $file ) {
$alt_text = '';
$img_contents = file_get_contents( $file );
if ( false === $img_contents ) {
return $alt_text;
}
// Find the start and end positions of the XMP metadata.
$xmp_start = strpos( $img_contents, '<x:xmpmeta' );
$xmp_end = strpos( $img_contents, '</x:xmpmeta>' );
if ( false === $xmp_start || false === $xmp_end ) {
// No XMP metadata found.
return $alt_text;
}
// Extract the XMP metadata from the JPEG contents
$xmp_data = substr( $img_contents, $xmp_start, $xmp_end - $xmp_start + 12 );
// Parse the XMP metadata using DOMDocument.
$doc = new DOMDocument();
if ( false === $doc->loadXML( $xmp_data ) ) {
// Invalid XML in metadata.
return $alt_text;
}
// Instantiate an XPath object, used to extract portions of the XMP.
$xpath = new DOMXPath( $doc );
// Register the relevant XML namespaces.
$xpath->registerNamespace( 'x', 'adobe:ns:meta/' );
$xpath->registerNamespace( 'rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#' );
$xpath->registerNamespace( 'Iptc4xmpCore', 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/' );
$node_list = $xpath->query( '/x:xmpmeta/rdf:RDF/rdf:Description/Iptc4xmpCore:AltTextAccessibility' );
if ( $node_list && $node_list->count() ) {
$node = $node_list->item( 0 );
// Get the site's locale.
$locale = get_locale();
// Get the alt text accessibility alternative most appropriate for the site language.
// There are 3 possibilities:
//
// 1. there is an rdf:li with an exact match on the site locale.
// 2. there is an rdf:li with a partial match on the site locale (e.g., site locale is en_US and rdf:li has @xml:lang="en").
// 3. there is an rdf:li with an "x-default" lang.
//
// Evaluate in that order, stopping when we have a match.
$alt_text = $xpath->evaluate( "string( rdf:Alt/rdf:li[ @xml:lang = '{$locale}' ] )", $node );
if ( ! $alt_text ) {
$alt_text = $xpath->evaluate( 'string( rdf:Alt/rdf:li[ @xml:lang = "' . substr( $locale, 0, 2 ) . '" ] )', $node );
if ( ! $alt_text ) {
$alt_text = $xpath->evaluate( 'string( rdf:Alt/rdf:li[ @xml:lang = "x-default" ] )', $node );
}
}
}
return $alt_text;
}
/**
* Validates that file is an image.
*
* @since 2.5.0
*
* @param string $path File path to test if valid image.
* @return bool True if valid image, false if not valid image.
*/
function file_is_valid_image( $path ) {
$size = wp_getimagesize( $path );
return ! empty( $size );
}
/**
* Validates that file is suitable for displaying within a web page.
*
* @since 2.5.0
*
* @param string $path File path to test.
* @return bool True if suitable, false if not suitable.
*/
function file_is_displayable_image( $path ) {
$displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP, IMAGETYPE_ICO, IMAGETYPE_WEBP, IMAGETYPE_AVIF );
$info = wp_getimagesize( $path );
if ( empty( $info ) ) {
$result = false;
} elseif ( ! in_array( $info[2], $displayable_image_types, true ) ) {
$result = false;
} else {
$result = true;
}
/**
* Filters whether the current image is displayable in the browser.
*
* @since 2.5.0
*
* @param bool $result Whether the image can be displayed. Default true.
* @param string $path Path to the image.
*/
return apply_filters( 'file_is_displayable_image', $result, $path );
}
/**
* Loads an image resource for editing.
*
* @since 2.9.0
*
* @param int $attachment_id Attachment ID.
* @param string $mime_type Image mime type.
* @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
* of width and height values in pixels (in that order). Default 'full'.
* @return resource|GdImage|false The resulting image resource or GdImage instance on success,
* false on failure.
*/
function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
$filepath = _load_image_to_edit_path( $attachment_id, $size );
if ( empty( $filepath ) ) {
return false;
}
switch ( $mime_type ) {
case 'image/jpeg':
$image = imagecreatefromjpeg( $filepath );
break;
case 'image/png':
$image = imagecreatefrompng( $filepath );
break;
case 'image/gif':
$image = imagecreatefromgif( $filepath );
break;
case 'image/webp':
$image = false;
if ( function_exists( 'imagecreatefromwebp' ) ) {
$image = imagecreatefromwebp( $filepath );
}
break;
default:
$image = false;
break;
}
if ( is_gd_image( $image ) ) {
/**
* Filters the current image being loaded for editing.
*
* @since 2.9.0
*
* @param resource|GdImage $image Current image.
* @param int $attachment_id Attachment ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
$image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size );
if ( function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
imagealphablending( $image, false );
imagesavealpha( $image, true );
}
}
return $image;
}
/**
* Retrieves the path or URL of an attachment's attached file.
*
* If the attached file is not present on the local filesystem (usually due to replication plugins),
* then the URL of the file is returned if `allow_url_fopen` is supported.
*
* @since 3.4.0
* @access private
*
* @param int $attachment_id Attachment ID.
* @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
* of width and height values in pixels (in that order). Default 'full'.
* @return string|false File path or URL on success, false on failure.
*/
function _load_image_to_edit_path( $attachment_id, $size = 'full' ) {
$filepath = get_attached_file( $attachment_id );
if ( $filepath && file_exists( $filepath ) ) {
if ( 'full' !== $size ) {
$data = image_get_intermediate_size( $attachment_id, $size );
if ( $data ) {
$filepath = path_join( dirname( $filepath ), $data['file'] );
/**
* Filters the path to an attachment's file when editing the image.
*
* The filter is evaluated for all image sizes except 'full'.
*
* @since 3.1.0
*
* @param string $path Path to the current image.
* @param int $attachment_id Attachment ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
$filepath = apply_filters( 'load_image_to_edit_filesystempath', $filepath, $attachment_id, $size );
}
}
} elseif ( function_exists( 'fopen' ) && ini_get( 'allow_url_fopen' ) ) {
/**
* Filters the path to an attachment's URL when editing the image.
*
* The filter is only evaluated if the file isn't stored locally and `allow_url_fopen` is enabled on the server.
*
* @since 3.1.0
*
* @param string|false $image_url Current image URL.
* @param int $attachment_id Attachment ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
$filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size );
}
/**
* Filters the returned path or URL of the current image.
*
* @since 2.9.0
*
* @param string|false $filepath File path or URL to current image, or false.
* @param int $attachment_id Attachment ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size );
}
/**
* Copies an existing image file.
*
* @since 3.4.0
* @access private
*
* @param int $attachment_id Attachment ID.
* @return string|false New file path on success, false on failure.
*/
function _copy_image_file( $attachment_id ) {
$dst_file = get_attached_file( $attachment_id );
$src_file = $dst_file;
if ( ! file_exists( $src_file ) ) {
$src_file = _load_image_to_edit_path( $attachment_id );
}
if ( $src_file ) {
$dst_file = str_replace( wp_basename( $dst_file ), 'copy-' . wp_basename( $dst_file ), $dst_file );
$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), wp_basename( $dst_file ) );
/*
* The directory containing the original file may no longer
* exist when using a replication plugin.
*/
wp_mkdir_p( dirname( $dst_file ) );
if ( ! copy( $src_file, $dst_file ) ) {
$dst_file = false;
}
} else {
$dst_file = false;
}
return $dst_file;
}