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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 |
|---|---|
| 222 | * 3. The plugin basename minus the file extension. |
| 223 | * |
| 224 | * Together, the three parts form the `$page_hook`. Citing the example above, |
| 225 | * the hook name used would be 'load-settings_page_pluginbasename'. |
| 226 | * |
| 227 | * @see get_plugin_page_hook() |
| 228 | * |
| 229 | * @since 2.1.0 |
| 230 | */ |
| 231 | do_action( "load-{$page_hook}" ); |
| 232 | if ( ! isset( $_GET['noheader'] ) ) { |
| 233 | require_once( ABSPATH . 'wp-admin/admin-header.php' ); |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Used to call the registered callback for a plugin screen. |
| 238 | * |
| 239 | * This hook uses a dynamic hook name, `$page_hook`, which refers to a mixture of plugin |
| 240 | * page information including: |