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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 |
---|---|
356 | * The load-* hook fires in a number of contexts. This hook is for core screens. |
357 | * |
358 | * The dynamic portion of the hook name, `$pagenow`, is a global variable |
359 | * referring to the filename of the current page, such as 'admin.php', |
360 | * 'post-new.php' etc. A complete hook for the latter would be |
361 | * 'load-post-new.php'. |
362 | * |
363 | * @since 2.1.0 |
364 | */ |
365 | do_action( "load-{$pagenow}" ); |
366 |
|
367 | /* |
368 | * The following hooks are fired to ensure backward compatibility. |
369 | * In all other cases, 'load-' . $pagenow should be used instead. |
370 | */ |
371 | if ( $typenow == 'page' ) { |
372 | if ( $pagenow == 'post-new.php' ) { |
373 | do_action( 'load-page-new.php' ); |
374 | } elseif ( $pagenow == 'post.php' ) { |