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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Ni Shurong <[EMAIL PROTECTED]>

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