PHP - cannot find correct regex

Question

I am trying to figure out a regex that would match 012 but wound't match 0. So basically if the string is one character and that character equals 0 then it should false but it should work with values like 012, 023, 01, 05, 120.

I tried that but it doesn't do what i want.

^(?=[^0])(?=[0-9]{1,3})$

Any idea?

^(?=\d*[1-9])\d+$ Gleamed from: [stack overflow question](http://stackoverflow.com/questions/7036324/what-is-the-regex-for-any-positive-integer-excluding-0) — Bethany Seeger, Oct 15 '14 at 15:29

score 3 · Accepted Answer · answered Oct 15 '14 at 15:20

3

^(?!0$)\d+$

Try this.See demo.

http://regex101.com/r/dZ1vT6/27

answered Oct 15 '14 at 15:20

vks

67,027
10
91
124

1

Awesome, can you please explain? – pit_ns Oct 15 '14 at 15:23
^(?!0$)[0-9]{1,3}$ , look ahead expression, except when it is starting and ending with 0, it will match others – radar Oct 15 '14 at 15:27
@pit_ns for explaination you probably can take a look at right side of the link that provided – Suganthan Madhavan Pillai Oct 15 '14 at 15:28
1

@pit_ns it captures all numbers but uses negative lookahead to see if a number is just 0. – vks Oct 15 '14 at 15:34

PHP - cannot find correct regex

1 Answers1