Get file extension program code in PHP

Method 1: One of my most convenient methods to get an extension

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Function extend_2 ($ file_name) { $ Extend = pathinfo ($ file_name ); $ Extend = strtolower ($ extend ["extension"]); Return $ extend; }

Method 2: use the combination of explode and end functions

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Function get_extension ($ file) { Return end (explode ('.', $ file )); }

Method 3 is the same as getting an extension in asp.

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Function get_extension ($ file) { Substr (strrchr ($ file, '.'), 1 ); }

Okay, there are three methods. Basically, you can get the file extension.