PHP - 比字符串更快地删除字符串中的最后N个字符（$ s，0， - $ N）

Question

I have a script trimming strings this way billions of times.

$s = substr($s, 0, -$n);

Is there a way to do it faster an without reassigning the string?

Answer 1

By definition strings are not mutable in PHP. To "cut" a string, you'll have to create a new string based on the original string, making it necessary to reassign it. The code you have is probably already the most minimalist way to do it.