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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 |
|---|---|
| 1724 | |
| 1725 | ?></div> |
| 1726 | <?php |
| 1727 | if ( is_multisite() && !is_upload_space_available() ) { |
| 1728 | /** |
| 1729 | * Fires when an upload will exceed the defined upload space quota for a network site. |
| 1730 | * |
| 1731 | * @since 3.5.0 |
| 1732 | */ |
| 1733 | do_action( 'upload_ui_over_quota' ); |
| 1734 | return; |
| 1735 | } |
| 1736 | |
| 1737 | /** |
| 1738 | * Fires just before the legacy (pre-3.5.0) upload interface is loaded. |
| 1739 | * |
| 1740 | * @since 2.6.0 |
| 1741 | */ |
| 1742 | do_action( 'pre-upload-ui' ); |