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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 |
|---|---|
| 58 | |
| 59 | /** |
| 60 | * Fires before each tab on the Install Plugins screen is loaded. |
| 61 | * |
| 62 | * The dynamic portion of the action hook, `$tab`, allows for targeting |
| 63 | * individual tabs, for instance 'install_plugins_pre_plugin-information'. |
| 64 | * |
| 65 | * @since 2.7.0 |
| 66 | */ |
| 67 | do_action( "install_plugins_pre_$tab" ); |
| 68 | |
| 69 | get_current_screen()->add_help_tab( array( |
| 70 | 'id' => 'overview', |
| 71 | 'title' => __('Overview'), |
| 72 | 'content' => |
| 73 | '<p>' . sprintf(__('Plugins hook into WordPress to extend its functionality with custom features. Plugins are developed independently from the core WordPress application by thousands of developers all over the world. All plugins in the official <a href="%s" target="_blank">WordPress.org Plugin Directory</a> are compatible with the license WordPress uses. You can find new plugins to install by searching or browsing the Directory right here in your own Plugins section.'), 'https://wordpress.org/plugins/') . '</p>' |
| 74 | ) ); |
| 75 | get_current_screen()->add_help_tab( array( |
| 76 | 'id' => 'adding-plugins', |