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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 |
|---|---|
| 1789 | |
| 1790 | /** |
| 1791 | * Filter the media upload post parameters. |
| 1792 | * |
| 1793 | * @since 3.1.0 As 'swfupload_post_params' |
| 1794 | * @since 3.3.0 |
| 1795 | * |
| 1796 | * @param array $post_params An array of media upload parameters used by Plupload. |
| 1797 | */ |
| 1798 | $post_params = apply_filters( 'upload_post_params', $post_params ); |
| 1799 | |
| 1800 | $plupload_init = array( |
| 1801 | 'runtimes' => 'html5,flash,silverlight,html4', |
| 1802 | 'browse_button' => 'plupload-browse-button', |
| 1803 | 'container' => 'plupload-upload-ui', |
| 1804 | 'drop_element' => 'drag-drop-area', |
| 1805 | 'file_data_name' => 'async-upload', |
| 1806 | 'url' => $upload_action_url, |
| 1807 | 'flash_swf_url' => includes_url( 'js/plupload/plupload.flash.swf' ), |