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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 |
|---|---|
| 2985 | * |
| 2986 | * @param mixed $value Value of the prefixed post field. |
| 2987 | * @param int $post_id Post ID. |
| 2988 | * @param string $context Context for how to sanitize the field. |
| 2989 | * Accepts 'raw', 'edit', 'db', 'display', |
| 2990 | * 'attribute', or 'js'. Default 'display'. |
| 2991 | */ |
| 2992 | $value = apply_filters( "{$field}", $value, $post_id, $context ); |
| 2993 | } else { |
| 2994 | $value = apply_filters( "post_{$field}", $value, $post_id, $context ); |
| 2995 | } |
| 2996 | |
| 2997 | if ( 'attribute' === $context ) { |
| 2998 | $value = esc_attr( $value ); |
| 2999 | } elseif ( 'js' === $context ) { |
| 3000 | $value = esc_js( $value ); |
| 3001 | } |
| 3002 | } |
| 3003 | |