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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 |
|---|---|
| 73 | * - `install_plugins_pre_featured` |
| 74 | * - `install_plugins_pre_plugin-information` |
| 75 | * - `install_plugins_pre_popular` |
| 76 | * - `install_plugins_pre_recommended` |
| 77 | * - `install_plugins_pre_search` |
| 78 | * - `install_plugins_pre_upload` |
| 79 | * |
| 80 | * @since 2.7.0 |
| 81 | */ |
| 82 | do_action( "install_plugins_pre_{$tab}" ); |
| 83 | |
| 84 | /* |
| 85 | * Call the pre upload action on every non-upload plugin installation screen |
| 86 | * because the form is always displayed on these screens. |
| 87 | */ |
| 88 | if ( 'upload' !== $tab ) { |
| 89 | /** This action is documented in wp-admin/plugin-install.php */ |
| 90 | do_action( 'install_plugins_pre_upload' ); |
| 91 | } |