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Link: http://codepad.org/7MUwFd2C    [ raw code | output | fork ]

PHP, pasted on May 23:
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<?php
function invert_case($str) {
    $inverted = '';
    for($i=0;$i<strlen($str);$i++) {
        $char = $str[$i];
        $upper = strtoupper($char);
        if($upper == $char) {
            $inverted .= strtolower($char);
        } else {
            $inverted .= $upper;
        }
    }
    return $inverted;
}
echo invert_case("paSS12^");
?>


Output:
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PAss12^


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