I did not test it:) function isValid($strData, $bIncludeAlpha=false, $bIncludeNumber=false) { switch(true) { case $bIncludeAlpha && !$bIncludeNumber: $ptr = "/^[a-zA-Z]+/"; break; case !$bIncludeAlpha && $bIncludeNumber: $ptr = "/^[0-9]+/"; break; case $bIncludeAlpha && $bIncludeNumber: $ptr = "/^[a-zA-Z0-9]+/"; break; } return preg_match($ptr, $strData); }
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