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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 |
|---|---|
| 1773 | // to ensure plugins will work. We will then unset those tabs. |
| 1774 | $tabs = array( |
| 1775 | // handler action suffix => tab label |
| 1776 | 'type' => '', |
| 1777 | 'type_url' => '', |
| 1778 | 'gallery' => '', |
| 1779 | 'library' => '', |
| 1780 | ); |
| 1781 | |
| 1782 | $tabs = apply_filters( 'media_upload_tabs', $tabs ); |
| 1783 | unset( $tabs['type'], $tabs['type_url'], $tabs['gallery'], $tabs['library'] ); |
| 1784 | |
| 1785 | $props = array( |
| 1786 | 'link' => get_option( 'image_default_link_type' ), // db default is 'file' |
| 1787 | 'align' => get_option( 'image_default_align' ), // empty default |
| 1788 | 'size' => get_option( 'image_default_size' ), // empty default |
| 1789 | ); |
| 1790 | |
| 1791 | $settings = array( |