regex_match仅用于长度

Question

I have this regex_match here

regex_match[/^{0,100}+$/]

I am trying to just to validate the length of my string, but I get this error

A PHP Error was encountered
Severity: Warning

Message: preg_match(): Compilation failed: nothing to repeat at offset 7

Filename: libraries/Form_validation.php

Line Number: 911

What Am I doing wrong?

Answer 1

although I'm admittedly unclear on what exactly you're trying to accomplish, why not just use strlen?

strlen($string) >= 100 should give the same results.

Answer 2

尝试这个：

regex_match[/^.{0,100}$/]

Answer 3

The {0,100} bit requires something to repeat, eg [az]{0,100} but your examples has nothing. You might want ot use a . for "any character"