Get file extension program code in PHP _php tutorial

In PHP sometimes we want to get the extension of the upload file, below I summarize the extension in PHP to get a summary of the method, there is a need for friends to refer to.

Method One, my own most kind of get extension method

The code is as follows	Copy Code
function Extend_2 ($file _name) { $extend = PathInfo ($file _name); $extend = Strtolower ($extend ["extension"]); return $extend; }

Method Two, combining operations with the End function using the EXPLODE function

The code is as follows	Copy Code
function Get_extension ($file) { Return End (Explode ('. ', $file)); }

Method Three, is the same as before the extension in the ASP to get the same practice.

The code is as follows	Copy Code
function Get_extension ($file) { substr (STRRCHR ($file, '. '), 1); }

Okay, here are the three kinds of methods, basically to meet you get the file name extension.

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