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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 |
|---|---|
| 6026 | /* |
| 6027 | * Only apply the decoding attribute to images that have a src attribute that |
| 6028 | * starts with a double quote, ensuring escaped JSON is also excluded. |
| 6029 | */ |
| 6030 | if ( ! str_contains( $image, ' src="' ) ) { |
| 6031 | return $image; |
| 6032 | } |
| 6033 | |
| 6034 | /** This action is documented in wp-includes/media.php */ |
| 6035 | $value = apply_filters( 'wp_img_tag_add_decoding_attr', 'async', $image, $context ); |
| 6036 | |
| 6037 | if ( in_array( $value, array( 'async', 'sync', 'auto' ), true ) ) { |
| 6038 | $image = str_replace( '<img ', '<img decoding="' . esc_attr( $value ) . '" ', $image ); |
| 6039 | } |
| 6040 | |
| 6041 | return $image; |
| 6042 | } |
| 6043 | |
| 6044 | /** |