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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 |
|---|---|
| 199 | } |
| 200 | |
| 201 | if ( empty( $args ) ) { |
| 202 | $args = func_get_args(); |
| 203 | } |
| 204 | |
| 205 | // don't pass the tag name to WP_Hook |
| 206 | array_shift( $args ); |
| 207 | |
| 208 | $filtered = $wp_filter[ $tag ]->apply_filters( $value, $args ); |
| 209 | |
| 210 | array_pop( $wp_current_filter ); |
| 211 | |
| 212 | return $filtered; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Execute functions hooked on a specific filter hook, specifying arguments in an array. |
| 217 | * |