title: php memory_limit issue
body: <p>one of my script required large memory. and probably because of this I am getting following error</p>
  
  <blockquote>
    <p>Fatal error: Out of memory (allocated
    42729472) (tried to allocate 32 bytes)</p>
  </blockquote>
  
  <p>I tried to change memory_limit by using ini_set('memory_limit', '256M'); on the top of my page but still I am getting same issues. I also tried ini_set('memory_limit', '512M'); but no luck.</p>