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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 |
|---|---|
| 69 | */ |
| 70 | do_action( "install_plugins_pre_{$tab}" ); |
| 71 | |
| 72 | /* |
| 73 | * Call the pre upload action on every non-upload plugin installation screen |
| 74 | * because the form is always displayed on these screens. |
| 75 | */ |
| 76 | if ( 'upload' !== $tab ) { |
| 77 | /** This action is documented in wp-admin/plugin-install.php */ |
| 78 | do_action( 'install_plugins_pre_upload' ); |
| 79 | } |
| 80 | |
| 81 | get_current_screen()->add_help_tab( |
| 82 | array( |
| 83 | 'id' => 'overview', |
| 84 | 'title' => __( 'Overview' ), |
| 85 | 'content' => |
| 86 | '<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">WordPress Plugin Directory</a> are compatible with the license WordPress uses.' ), __( 'https://wordpress.org/plugins/' ) ) . '</p>' . |
| 87 | '<p>' . __( 'You can find new plugins to install by searching or browsing the directory right here in your own Plugins section.' ) . ' <span id="live-search-desc" class="hide-if-no-js">' . __( 'The search results will be updated as you type.' ) . '</span></p>', |