Скрипт коррекции

<?php

   $fnamesrc = "env.fex";
   $fnamecor = "env.img";
   $content  = file_get_contents($fnamesrc,false,null, 4);
   $content  = preg_replace('|loglevel=(\d+)|',"loglevel=2", $content);
   $content  = preg_replace('|bootdelay=(\d+)|',"bootdelay=5", $content);
   $crc      = crc32($content);
   $strcrc   = pack("V",$crc);
   $mcontent = "$strcrc$content";
   $r        = file_put_contents($fnamecor,$mcontent);
   if($r)
       echo "<p>$fnamecor - Ok</p>";
?>