How does php remove the last few characters-PHP problem

How to remove the last few characters in php: first create a PHP sample file; then define a string; finally use the “substr($str,0,-4);” method to remove the last specified character. Recommendation: “PHP Video Tutorial” <? php $str='programming'; //Define a string $res=substr($str,-4); //Process string echo "Return the last 4 characters {$res} of {$str} string"; $res=substr($str,0,-4); //Process string echo "Return to the {$str} string to remove the last 4 characters{$res}”;?> The above is the detailed content of how PHP removes the last few characters, and more Please pay more attention to other related articles on 1024programmer.com!