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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 |
|---|---|
| 1834 | |
| 1835 | ?></div> |
| 1836 | <?php |
| 1837 | if ( is_multisite() && !is_upload_space_available() ) { |
| 1838 | /** |
| 1839 | * Fires when an upload will exceed the defined upload space quota for a network site. |
| 1840 | * |
| 1841 | * @since 3.5.0 |
| 1842 | */ |
| 1843 | do_action( 'upload_ui_over_quota' ); |
| 1844 | return; |
| 1845 | } |
| 1846 | |
| 1847 | /** |
| 1848 | * Fires just before the legacy (pre-3.5.0) upload interface is loaded. |
| 1849 | * |
| 1850 | * @since 2.6.0 |
| 1851 | */ |
| 1852 | do_action( 'pre-upload-ui' ); |