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PCode.php

<?php

class PCode
{
    private static $vector = array (
  0 =>
  array (
    'detect' => '247\\d\\d\\d\\d',
    'mask' => '+247-####',
  ),
 // <<<<< more codes here 
);


    /**
     *
     * @param unknown $phs
     * @return string
     */
    public static function format($phn)
    {
        $result = $phn;
        foreach(self::$vector as $row)
        {
            if(preg_match('/'.$row['detect'].'/s', $phn))
            {
                $reverse     = array_reverse( str_split($phn) );
                $reverseMask = array_reverse( str_split($row['mask']) );

                $newresult = array();
                $ridx = 0;

                foreach($reverseMask as $k)
                {
                    if($k=='#')
                    {
                        $newresult[] = $reverse[$ridx];
                        $ridx++;
                    }
                    else
                        $newresult[] = $k;
                }

                $result = implode('', array_reverse( $newresult ));
            }
        }
        return $result;
    }

}