Script to Crack MD5 crypt with a salt

<?php
$hash = 'e626d51g54t54765a88396c35d05';
$wordlist = fopen("/usr/share/wordlists/rockyou.txt","r");
$count  = 0;
$start_time = microtime(true);
while(! feof($wordlist))  {
    $str = fgets($wordlist);
  $str = trim($str);
  $genhash = md5(crypt($str,'fa'));
  if($hash == $genhash){
    echo "Password Found: ". $str."\n";
    $end_time = microtime(true);
    $execution_time = ($end_time - $start_time);
    echo "Tried Passwords:=". $count."\n";
    echo "Time taken in cracking = ".$execution_time." sec";
    fclose($wordlist);
    exit(0);
  }
  else
  {
    $count = $count+1;
  }
  }
fclose($wordlist);
?>