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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 |
---|---|
2862 | * |
2863 | * @param mixed $value Value of the prefixed post field. |
2864 | * @param int $post_id Post ID. |
2865 | * @param string $context Context for how to sanitize the field. |
2866 | * Accepts 'raw', 'edit', 'db', 'display', |
2867 | * 'attribute', or 'js'. Default 'display'. |
2868 | */ |
2869 | $value = apply_filters( "{$field}", $value, $post_id, $context ); |
2870 | } else { |
2871 | $value = apply_filters( "post_{$field}", $value, $post_id, $context ); |
2872 | } |
2873 |
|
2874 | if ( 'attribute' === $context ) { |
2875 | $value = esc_attr( $value ); |
2876 | } elseif ( 'js' === $context ) { |
2877 | $value = esc_js( $value ); |
2878 | } |
2879 | } |
2880 |
|