A simple way to get the file extension in php, _PHP tutorial

How to simply obtain the file extension in php,

The example in this article describes the simple method of obtaining the file extension in php. Share it with everyone for your reference. The specific implementation method is as follows:

<&#63;php
 function get_file_extension($file_name)
 {
  /* may contain multiple dots */
  $string_parts = explode('.', $file_name);
  $extension = $string_parts[count($string_parts) - 1];
  $extension = strtolower($extension);
  return $extension;
 }
 $str="img.jpg";
 echo get_file_extension($str);//输出：jpg
&#63;>

I hope this article will be helpful to everyone’s PHP programming design.