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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 |
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423 | $exif = array(); |
424 |
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425 | /** |
426 | * Filters the image types to check for exif data. |
427 | * |
428 | * @since 2.5.0 |
429 | * |
430 | * @param array $image_types Image types to check for exif data. |
431 | */ |
432 | $exif_image_types = apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ); |
433 |
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434 | if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types ) ) { |
435 | $exif = @exif_read_data( $file ); |
436 |
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437 | if ( ! empty( $exif['ImageDescription'] ) ) { |
438 | mbstring_binary_safe_encoding(); |
439 | $description_length = strlen( $exif['ImageDescription'] ); |
440 | reset_mbstring_encoding(); |
441 |
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