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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 |
|---|---|
| 4967 | 'post_parent' => $post_id, |
| 4968 | 'post_mime_type' => $type, |
| 4969 | 'guid' => $upload[ 'url' ] |
| 4970 | ); |
| 4971 | |
| 4972 | // Save the data |
| 4973 | $id = wp_insert_attachment( $attachment, $upload[ 'file' ], $post_id ); |
| 4974 | wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $upload['file'] ) ); |
| 4975 | |
| 4976 | do_action( 'xmlrpc_call_success_mw_newMediaObject', $id, $args ); |
| 4977 | |
| 4978 | $struct = array( |
| 4979 | 'id' => strval( $id ), |
| 4980 | 'file' => $name, |
| 4981 | 'url' => $upload[ 'url' ], |
| 4982 | 'type' => $type |
| 4983 | ); |
| 4984 | return apply_filters( 'wp_handle_upload', $struct, 'upload' ); |
| 4985 | } |