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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 |
|---|---|
| 193 | * 3. The plugin basename minus the file extension. |
| 194 | * |
| 195 | * Together, the three parts form the $page_hook. Citing the example above, |
| 196 | * the hook name used would be 'load-settings_page_pluginbasename'. |
| 197 | * |
| 198 | * @see get_plugin_page_hook() |
| 199 | * |
| 200 | * @since 2.1.0 |
| 201 | */ |
| 202 | do_action( 'load-' . $page_hook ); |
| 203 | if (! isset($_GET['noheader'])) |
| 204 | require_once(ABSPATH . 'wp-admin/admin-header.php'); |
| 205 | |
| 206 | /** |
| 207 | * Used to call the registered callback for a plugin screen. |
| 208 | * |
| 209 | * @internal |
| 210 | * @since 1.5.0 |
| 211 | */ |