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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 |
|---|---|
| 2864 | * |
| 2865 | * @param mixed $value Value of the prefixed post field. |
| 2866 | * @param int $post_id Post ID. |
| 2867 | * @param string $context Context for how to sanitize the field. |
| 2868 | * Accepts 'raw', 'edit', 'db', 'display', |
| 2869 | * 'attribute', or 'js'. Default 'display'. |
| 2870 | */ |
| 2871 | $value = apply_filters( "{$field}", $value, $post_id, $context ); |
| 2872 | } else { |
| 2873 | $value = apply_filters( "post_{$field}", $value, $post_id, $context ); |
| 2874 | } |
| 2875 | |
| 2876 | if ( 'attribute' === $context ) { |
| 2877 | $value = esc_attr( $value ); |
| 2878 | } elseif ( 'js' === $context ) { |
| 2879 | $value = esc_js( $value ); |
| 2880 | } |
| 2881 | } |
| 2882 | |