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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 |
|---|---|
| 4571 | 'post_parent' => $post_id, |
| 4572 | 'post_mime_type' => $type, |
| 4573 | 'guid' => $upload[ 'url' ] |
| 4574 | ); |
| 4575 | |
| 4576 | // Save the data |
| 4577 | $id = wp_insert_attachment( $attachment, $upload[ 'file' ], $post_id ); |
| 4578 | wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $upload['file'] ) ); |
| 4579 | |
| 4580 | do_action( 'xmlrpc_call_success_mw_newMediaObject', $id, $args ); |
| 4581 | |
| 4582 | $struct = array( |
| 4583 | 'id' => strval( $id ), |
| 4584 | 'file' => $name, |
| 4585 | 'url' => $upload[ 'url' ], |
| 4586 | 'type' => $type |
| 4587 | ); |
| 4588 | return apply_filters( 'wp_handle_upload', $struct, 'upload' ); |
| 4589 | } |