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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 |
|---|---|
| 2145 | |
| 2146 | /** |
| 2147 | * Filters the media upload post parameters. |
| 2148 | * |
| 2149 | * @since 3.1.0 As 'swfupload_post_params' |
| 2150 | * @since 3.3.0 |
| 2151 | * |
| 2152 | * @param array $post_params An array of media upload parameters used by Plupload. |
| 2153 | */ |
| 2154 | $post_params = apply_filters( 'upload_post_params', $post_params ); |
| 2155 | |
| 2156 | /* |
| 2157 | * Since 4.9 the `runtimes` setting is hardcoded in our version of Plupload to `html5,html4`, |
| 2158 | * and the `flash_swf_url` and `silverlight_xap_url` are not used. |
| 2159 | */ |
| 2160 | $plupload_init = array( |
| 2161 | 'browse_button' => 'plupload-browse-button', |
| 2162 | 'container' => 'plupload-upload-ui', |
| 2163 | 'drop_element' => 'drag-drop-area', |