Validate file extension (smaller code)

Created by Jose Chafardet, last update on 30/10/2008 11:38

this is a file extension validation snipped i wrote some days ago, is smaller than the existing one here, and works really fine, it uses a small regex for the comparison and it does requires the . on the ext.

/**
 *
 * validate_file_ext()
 * Get the file extension of a file and validates if valid.
 * @param $filename Filename to get the extension from
 * @returns bool (returns true if file is allowed, false if isnt )
 * @author Jose L. Chafardet
 *
 */
function validate_file_ext ( $filename ) {
    $file_ext = strrchr ( $filename, '.' );
    if (! preg_match (
"/.mp3|.wma|.mov|.flv|.wmv|.mpg|.mpeg|.jpg|.jpeg|.gif|.png/",
$file_ext )) {
        return false;
    } else {
        return true;
    }
}
 

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