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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 770 | $exif = array(); |
| 771 | |
| 772 | /** |
| 773 | * Filters the image types to check for exif data. |
| 774 | * |
| 775 | * @since 2.5.0 |
| 776 | * |
| 777 | * @param array $image_types Image types to check for exif data. |
| 778 | */ |
| 779 | $exif_image_types = apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ); |
| 780 | |
| 781 | if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types, true ) ) { |
| 782 | $exif = @exif_read_data( $file ); |
| 783 | |
| 784 | if ( ! empty( $exif['ImageDescription'] ) ) { |
| 785 | mbstring_binary_safe_encoding(); |
| 786 | $description_length = strlen( $exif['ImageDescription'] ); |
| 787 | reset_mbstring_encoding(); |
| 788 | |