Convert hexadecimal color to rgba

gistfile1.txt

/**
 * Converts hexidecimal to rgb format
 */

function lab_hex_to_rgb( $hex, $opacity = 1 ) {
     
     $hex = str_replace( '#', '', $hex );
     
     // if in 3 digit format
     if( strlen( $hex ) == 3) {
          $r = hexdec( substr( $hex, 0, 1 ) . substr( $hex, 0, 1 ) );
          $g = hexdec( substr( $hex, 1, 1 ) . substr( $hex, 1, 1 ) );
          $b = hexdec( substr( $hex, 2, 1 ) . substr( $hex, 2, 1 ) );
     } else {
          $r = hexdec( substr( $hex, 0, 2 ) );
          $g = hexdec( substr( $hex, 2, 2 ) );
          $b = hexdec( substr( $hex, 4, 2 ) );
     }
     
     return "rgba( $r, $g, $b, $opacity )";

}