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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 |
|---|---|
| 1861 | |
| 1862 | /** |
| 1863 | * Filters the media upload post parameters. |
| 1864 | * |
| 1865 | * @since 3.1.0 As 'swfupload_post_params' |
| 1866 | * @since 3.3.0 |
| 1867 | * |
| 1868 | * @param array $post_params An array of media upload parameters used by Plupload. |
| 1869 | */ |
| 1870 | $post_params = apply_filters( 'upload_post_params', $post_params ); |
| 1871 | |
| 1872 | /* |
| 1873 | * Since 4.9 the `runtimes` setting is hardcoded in our version of Plupload to `html5,html4`, |
| 1874 | * and the `flash_swf_url` and `silverlight_xap_url` are not used. |
| 1875 | */ |
| 1876 | $plupload_init = array( |
| 1877 | 'browse_button' => 'plupload-browse-button', |
| 1878 | 'container' => 'plupload-upload-ui', |
| 1879 | 'drop_element' => 'drag-drop-area', |