title: How to find crc32 of big files?
body: <p>The PHP's crc32  support string as input.And For a file , below code will work OFC.</p>
  
  <pre><code>crc32(file_get_contents("myfile.CSV"));
  </code></pre>
  
  <p>But if file goes huge (2 GB) it might raise out of memory Fatal error.</p>
  
  <p>So any way around to find checksum of huge files ?</p>