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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 |
---|---|
141 | * Fires as an admin screen or script is being initialized. |
142 | * |
143 | * Note, this does not just run on user-facing admin screens. |
144 | * It runs on admin-ajax.php and admin-post.php as well. |
145 | * |
146 | * This is roughly analgous to the more general 'init' hook, which fires earlier. |
147 | * |
148 | * @since 2.5.0 |
149 | */ |
150 | do_action( 'admin_init' ); |
151 |
|
152 | if ( isset($plugin_page) ) { |
153 | if ( !empty($typenow) ) |
154 | $the_parent = $pagenow . '?post_type=' . $typenow; |
155 | else |
156 | $the_parent = $pagenow; |
157 | if ( ! $page_hook = get_plugin_page_hook($plugin_page, $the_parent) ) { |
158 | $page_hook = get_plugin_page_hook($plugin_page, $plugin_page); |
159 | // backwards compatibility for plugins using add_management_page |