I am trying to write an if statement in php with preg_match to say

Question

Editorial Team

Asked: June 17, 20262026-06-17T17:58:04+00:00 2026-06-17T17:58:04+00:00

I am trying to write an if statement in php with preg_match to say allow 4 numbers and then a dot and then 2 numbers…

This is what I have….

$string = "10000.000";

if (preg_match('[/^\d{0,4}(\.\d{1,2})?$/]', $string)){
    return TRUE;
} else {
    return FALSE;
}

is my preg_match code wrong?

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Editorial Team · Answer 1 · 2026-06-17T17:58:05+00:00

Editorial Team

This should work as you want it!

^[0-9]{4}\.[0-9]{2}$

^ start of string,
[0-9] a number from 0 to 9,
{4} 4x times,
\. a dot,
$ end of the string

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