I am passing a string and making sure all the characters in that string
are valid.
Example:
For a persons age I am using:
if (!preg_match("/^[0-9]+$/", $Age)) echo "Enter numeric value for age".
But how would I include the following characters as permissible in preg
match
~!@#$%^&*()-=_+,.?/\|{}[]
since some of these characters have special meaning in PCRE regrex syntax??
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