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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 |
|---|---|
| 4979 | 'post_parent' => $post_id, |
| 4980 | 'post_mime_type' => $type, |
| 4981 | 'guid' => $upload[ 'url' ] |
| 4982 | ); |
| 4983 | |
| 4984 | // Save the data |
| 4985 | $id = wp_insert_attachment( $attachment, $upload[ 'file' ], $post_id ); |
| 4986 | wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $upload['file'] ) ); |
| 4987 | |
| 4988 | do_action( 'xmlrpc_call_success_mw_newMediaObject', $id, $args ); |
| 4989 | |
| 4990 | $struct = array( |
| 4991 | 'id' => strval( $id ), |
| 4992 | 'file' => $name, |
| 4993 | 'url' => $upload[ 'url' ], |
| 4994 | 'type' => $type |
| 4995 | ); |
| 4996 | return apply_filters( 'wp_handle_upload', $struct, 'upload' ); |
| 4997 | } |