PHP regular expressions: No ending delimiter '^' found in

PhpRegexPreg MatchPcre

Php Problem Overview

I've been having some trouble with regular expressions.

This is my code

$pattern = "^([0-9]+)$";

if (preg_match($pattern, $input))
   echo "yes";
else
   echo "nope";

I run it and get:

> Warning: preg_match() [function.preg-match]: No ending delimiter '^' found in

Php Solutions

Solution 1 - Php

PHP regex strings need delimiters. Try:

$numpattern="/^([0-9]+)$/";

Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the regex to /^\d+$/.

Example: <http://ideone.com/Ec3zh>

See also: PHP - Delimiters

Solution 2 - Php

Your regex pattern needs to be in delimiters:

$numpattern="/^([0-9]+)$/";

Solution 3 - Php

You can use T-Regx library, that doesn't need delimiters

pattern('^([0-9]+)$')->match($input);
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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionfingermanView Question on Stackoverflow
Solution 1 - PhpKobiView Answer on Stackoverflow
Solution 2 - PhpDavid PowersView Answer on Stackoverflow
Solution 3 - PhpDanonView Answer on Stackoverflow