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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 |
|---|---|
| 3204 | * |
| 3205 | * @since 2.3.0 |
| 3206 | * |
| 3207 | * @param mixed $value Value of the unprefixed post field. |
| 3208 | * @param int $post_id Post ID |
| 3209 | * @param string $context Context for how to sanitize the field. |
| 3210 | * Accepts 'raw', 'edit', 'db', 'display', |
| 3211 | * 'attribute', or 'js'. Default 'display'. |
| 3212 | */ |
| 3213 | $value = apply_filters( "post_{$field}", $value, $post_id, $context ); |
| 3214 | } |
| 3215 | |
| 3216 | if ( 'attribute' === $context ) { |
| 3217 | $value = esc_attr( $value ); |
| 3218 | } elseif ( 'js' === $context ) { |
| 3219 | $value = esc_js( $value ); |
| 3220 | } |
| 3221 | } |
| 3222 | |