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simple preg_match not working.

Posted on 2015-02-03
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Medium Priority
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Last Modified: 2015-02-03
This code use to work. I copied it to a new program and now I keep getting - Not a number. So I removed it and put it on a page by itself and get the same - Not a number. It seems to defy logic. Can someone spot something that I missed? Thanks.

<?php

$error = '';
$id = '5';

$pattern = '/^[0-9]{10}$/';
	if (!preg_match($pattern, $id)) {$error = 'Not a number.';}

echo $error;
?>

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Question by:kadin
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5 Comments
 
LVL 35

Accepted Solution

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Terry Woods earned 2000 total points
ID: 40587777
You'll want to update the pattern to this I think:
$pattern = '/^[0-9]{1,10}$/';
?>

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Expert Comment

by:Terry Woods
ID: 40587778
The pattern you had required exactly 10 digits to match; that's what the {10} does.
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 40587780
I don't know what's wrong with your code but this seems to work.  I included two versions, one with a number and one with a letter.
<?php

$error = '';
$id = '5';

//$pattern = '/^[0-9]{10}$/';
$pattern = '/[0-9]/';
	if (!preg_match($pattern, $id)) {$error = 'Not a number.';}
	else {$error = 'a number.';}

echo $id." is ".$error."<br>";

$id = 'A';

//$pattern = '/^[0-9]{10}$/';
$pattern = '/[0-9]/';
	if (!preg_match($pattern, $id)) {$error = 'Not a number.';}
	else {$error = 'a number.';}

echo $id." is ".$error."<br>";
?>

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LVL 84

Expert Comment

by:Dave Baldwin
ID: 40587783
@Terry_Wood's suggestion seems to work.
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Author Closing Comment

by:kadin
ID: 40587786
Thanks Terry and Dave.

I totally missed that.
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