Non-Alpha numeric characters are any which is not A-Z,a-z or 0-9

A classic example of Non-Alphanumeric characters are !ӣ$%^&*(), Here we will see how to remove Non-Alphanumeric characters using php.

THE CODE

< ?php
$str = "Here! are some numbers 1244 and some non alphanumeric characters !£$%^&";
$new_string = preg_replace("/[^a-zA-Z0-9\s]/", "", $str);
echo $new_string;
?>

This is a very simple script which remove ! and other characters from the string !£$%^&

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