Several ways to get file suffix names in PHP

There are a number of ways to get file suffixes, which can be summed up in 7, 8, basically the principle is divided into two kinds. The first one: Get the last "." in the filename. , and then intercept; the second: Use the explode to "." To split the number of groups, and then take the last value in the array.

Specific implementation of the source code reference:

$file 1 = ' e:/ddd/ww/file.doc.zip ';

$file 2 = ' e:/ddd/ww/file.jpg.png ';

$suffix 1 = end (Explode ('. ', $file 1)); First the filename with "." Split the number of groups, and then use the End function to take the last value of the array

$suffix 2 = substr ($file 2, Strrpos ($file 2, '. ') +1); Strrpos first calculates the last "." , and then use substr to intercept

echo $suffix 1. '. $suffix 2;