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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 |
|---|---|
| 1548 | |
| 1549 | $post_params = array( |
| 1550 | "post_id" => $post_id, |
| 1551 | "_wpnonce" => wp_create_nonce('media-form'), |
| 1552 | "type" => $_type, |
| 1553 | "tab" => $_tab, |
| 1554 | "short" => "1", |
| 1555 | ); |
| 1556 | |
| 1557 | $post_params = apply_filters( 'upload_post_params', $post_params ); // hook change! old name: 'swfupload_post_params' |
| 1558 | |
| 1559 | $plupload_init = array( |
| 1560 | 'runtimes' => 'html5,silverlight,flash,html4', |
| 1561 | 'browse_button' => 'plupload-browse-button', |
| 1562 | 'container' => 'plupload-upload-ui', |
| 1563 | 'drop_element' => 'drag-drop-area', |
| 1564 | 'file_data_name' => 'async-upload', |
| 1565 | 'multiple_queues' => true, |
| 1566 | 'max_file_size' => $max_upload_size . 'b', |