如何通过一定数量的字符缩短字符串？

Question

Is there a php function that can chop let's say 10 chars of the end of a string without calling strlen ? So I can avoid unnecessary repeating of variable names.

all I know is substr($str,0,strlen($str)-10);

Answer 1

It's simple: You should also check to subtract length of the $str if the length is less that your required chars to remove.

substr($str,0,-10);