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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 |
---|---|
376 | * The load-* hook fires in a number of contexts. This hook is for core screens. |
377 | * |
378 | * The dynamic portion of the hook name, `$pagenow`, is a global variable |
379 | * referring to the filename of the current page, such as 'admin.php', |
380 | * 'post-new.php' etc. A complete hook for the latter would be |
381 | * 'load-post-new.php'. |
382 | * |
383 | * @since 2.1.0 |
384 | */ |
385 | do_action( "load-{$pagenow}" ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
386 |
|
387 | /* |
388 | * The following hooks are fired to ensure backward compatibility. |
389 | * In all other cases, 'load-' . $pagenow should be used instead. |
390 | */ |
391 | if ( 'page' === $typenow ) { |
392 | if ( 'post-new.php' === $pagenow ) { |
393 | do_action( 'load-page-new.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
394 | } elseif ( 'post.php' === $pagenow ) { |