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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 |
|---|---|
| 312 | * |
| 313 | * The load-* hook fires in a number of contexts. This hook is for core screens. |
| 314 | * |
| 315 | * The dynamic portion of the hook name, $pagenow, is a global variable |
| 316 | * referring to the filename of the current page, such as 'admin.php', |
| 317 | * 'post-new.php' etc. A complete hook for the latter would be 'load-post-new.php'. |
| 318 | * |
| 319 | * @since 2.1.0 |
| 320 | */ |
| 321 | do_action( 'load-' . $pagenow ); |
| 322 | // Backwards compatibility with old load-page-new.php, load-page.php, |
| 323 | // and load-categories.php actions. |
| 324 | if ( $typenow == 'page' ) { |
| 325 | if ( $pagenow == 'post-new.php' ) |
| 326 | do_action( 'load-page-new.php' ); |
| 327 | elseif ( $pagenow == 'post.php' ) |
| 328 | do_action( 'load-page.php' ); |
| 329 | } elseif ( $pagenow == 'edit-tags.php' ) { |
| 330 | if ( $taxnow == 'category' ) |