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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 |
|---|---|
| 1460 | return $this->error; |
| 1461 | |
| 1462 | set_current_user(0, $user_login); |
| 1463 | if ( !current_user_can('upload_files') ) { |
| 1464 | logIO('O', '(MW) User does not have upload_files capability'); |
| 1465 | $this->error = new IXR_Error(401, __('You are not allowed to upload files to this site.')); |
| 1466 | return $this->error; |
| 1467 | } |
| 1468 | |
| 1469 | if ( $upload_err = apply_filters( "pre_upload_error", false ) ) |
| 1470 | return new IXR_Error(500, $upload_err); |
| 1471 | |
| 1472 | $upload = wp_upload_bits($name, $type, $bits, $overwrite); |
| 1473 | if ( ! empty($upload['error']) ) { |
| 1474 | $errorString = 'Could not write file ' . $name . ' (' . $upload['error'] . ')'; |
| 1475 | logIO('O', '(MW) ' . $errorString); |
| 1476 | return new IXR_Error(500, $errorString); |
| 1477 | } |
| 1478 | // Construct the attachment array |