PHP preg_match not matching with an expression to pattern

Question

I have this php code

if(preg_match('/BUT[a-zA-Z0-9]+TN/', $id))
{
echo "Match found";
}

For $id as 'BUTEqHLHxJSRr9DJZSMTN' , its not working/matching.But I have tested the regex pattern online with the id and it worked.Please help me find the issue.

Thanks

you failed to close the if function. if(preg_match('/BUT[a-zA-Z0-9]+TN/', $id)) — Avinash Raj
– Avinash Raj, Commented Jun 6, 2014 at 4:15
can you post your full code how you getting id or what error you facing — Rakesh Sharma
– Rakesh Sharma, Commented Jun 6, 2014 at 4:20

hwnd · Accepted Answer · 2014-06-06 04:33:58Z

2

You're missing the closing parentheses for your if statement.

if (preg_match('/BUT[a-zA-Z0-9]+TN/', $id))
                                          ^

EDIT: Your code and regular expression does work, see working demo. Perhaps you have another issue somewhere else inside your code or your variable $id possibly contains something different.

As you can see, this returns a match.

$id = 'BUTEqHLHxJSRr9DJZSMTN';
preg_match('/BUT[a-zA-Z0-9]+TN/', $id, $match);
echo $match[0]; //=> "BUTEqHLHxJSRr9DJZSMTN"

edited Jun 6, 2014 at 4:33

answered Jun 6, 2014 at 4:16

hwnd

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Comments

Vladimir Bashkirtsev · Accepted Answer · 2014-06-06 04:23:19Z

0

Please note that preg_match returns integer, not boolean. Proper if should look like:

if (preg_match('/BUT[a-zA-Z0-9]+TN/', $id) > 0)
  {
    echo "Match found";
  }

answered Jun 6, 2014 at 4:23

Vladimir Bashkirtsev

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2 Comments

Déjà vu Over a year ago

preg_match returns 0, 1 or false. Since you don't want neither 0 nor false, the > 0 is not necessary to catch a successful match.

Vladimir Bashkirtsev Over a year ago

@ring0 preg_match returns false only in case of error. We not going to feed bad regexp to it, do we? PHP is flexible about data types but being strict about types and explicit about values over time proven to be really good way of reducing number of bugs caused by automatic typecasting. Good programming habits will never go out of style :)

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