How to Remove Characters Except Numbers from a String ?

By | August 2, 2011
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Following Code will remove all character,special characters including space.

 
$givenNumber = "1245fdfd8454D FDFDF434 3$#$#%";
 
$testingNumber = preg_replace('[D]', '', $givenNumber);
 
echo $testingNumber;
 
Output is : 124584544343

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