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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 |
|---|---|
| 329 | */ |
| 330 | do_action( "load-{$pagenow}" ); |
| 331 | |
| 332 | /* |
| 333 | * The following hooks are fired to ensure backward compatibility. |
| 334 | * In all other cases, 'load-' . $pagenow should be used instead. |
| 335 | */ |
| 336 | if ( $typenow == 'page' ) { |
| 337 | if ( $pagenow == 'post-new.php' ) |
| 338 | do_action( 'load-page-new.php' ); |
| 339 | elseif ( $pagenow == 'post.php' ) |
| 340 | do_action( 'load-page.php' ); |
| 341 | } elseif ( $pagenow == 'edit-tags.php' ) { |
| 342 | if ( $taxnow == 'category' ) |
| 343 | do_action( 'load-categories.php' ); |
| 344 | elseif ( $taxnow == 'link_category' ) |
| 345 | do_action( 'load-edit-link-categories.php' ); |
| 346 | } elseif( 'term.php' === $pagenow ) { |
| 347 | do_action( 'load-edit-tags.php' ); |