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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 |
|---|---|
| 537 | elseif ( empty( $slug ) ) // just make a random name |
| 538 | $slug = substr( md5( uniqid( microtime() ) ), 0, 7); |
| 539 | $ext = preg_replace( '|.*/([a-z0-9]+)|', '$1', $_SERVER['CONTENT_TYPE'] ); |
| 540 | $slug = sanitize_file_name( "$slug.$ext" ); |
| 541 | $file = wp_upload_bits( $slug, null, $bits); |
| 542 | |
| 543 | $url = $file['url']; |
| 544 | $file = $file['file']; |
| 545 | |
| 546 | do_action('wp_create_file_in_uploads', $file); // replicate |
| 547 | |
| 548 | // Construct the attachment array |
| 549 | $attachment = array( |
| 550 | 'post_title' => $slug, |
| 551 | 'post_content' => $slug, |
| 552 | 'post_status' => 'attachment', |
| 553 | 'post_parent' => 0, |
| 554 | 'post_mime_type' => $type, |
| 555 | 'guid' => $url |