wp-includes/media.php:6323Determines the output format for the image editor.
$filenamestring$mime_typestringstring[]One hook fires while wp_get_image_editor_output_format() runs, in this order:
Filters the image editor output format mapping.
function wp_get_image_editor_output_format( $filename, $mime_type ) { $output_format = array( 'image/heic' => 'image/jpeg', 'image/heif' => 'image/jpeg', 'image/heic-sequence' => 'image/jpeg', 'image/heif-sequence' => 'image/jpeg', ); /** * Filters the image editor output format mapping. * * Enables filtering the mime type used to save images. By default HEIC/HEIF images * are converted to JPEGs. * * @see WP_Image_Editor::get_output_format() * * @since 5.8.0 * @since 6.7.0 The default was changed from an empty array to an array * containing the HEIC/HEIF images mime types. * * @param string[] $output_format { * An array of mime type mappings. Maps a source mime type to a new * destination mime type. By default maps HEIC/HEIF input to JPEG output. * * @type string ...$0 The new mime type. * } * @param string $filename Path to the image. * @param string $mime_type The source image mime type. */ return apply_filters( 'image_editor_output_format', $output_format, $filename, $mime_type );}Introduced in 6.7.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
string[] to array<string,.verified against sourcesrc/wp-includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.