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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 |
|---|---|
| 1793 | |
| 1794 | ?></div> |
| 1795 | <?php |
| 1796 | if ( is_multisite() && !is_upload_space_available() ) { |
| 1797 | /** |
| 1798 | * Fires when an upload will exceed the defined upload space quota for a network site. |
| 1799 | * |
| 1800 | * @since 3.5.0 |
| 1801 | */ |
| 1802 | do_action( 'upload_ui_over_quota' ); |
| 1803 | return; |
| 1804 | } |
| 1805 | |
| 1806 | /** |
| 1807 | * Fires just before the legacy (pre-3.5.0) upload interface is loaded. |
| 1808 | * |
| 1809 | * @since 2.6.0 |
| 1810 | */ |
| 1811 | do_action( 'pre-upload-ui' ); |