Numeric value only

[udch]

I want to get only numeric from a variable. Example:- $a=1452kk;                               $b=kj4554; I want only numeric value like 1452 and 4554 I can do this with parseFloat and trim in java script but how can get only numeric value in php ?

[Marc Firth]

http://uk2.php.net/trim[^] or :

$a=1452kk;
$a = implode("", explode("kk", $a));
echo $a;

//outputs: 1452

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