compareAttribute [ 1.1 版本 ]

compare的实现：

    /**
     * Compares two values with the specified operator.
     * @param string $operator the comparison operator
     * @param string $type the type of the values being compared
     * @param mixed $value the value being compared
     * @param mixed $compareValue another value being compared
     * @return boolean whether the comparison using the specified operator is true.
     */
    protected function compareValues($operator, $type, $value, $compareValue)
    {
        if ($type === 'number') {
            $value = (float) $value;
            $compareValue = (float) $compareValue;
        } else {
            $value = (string) $value;
            $compareValue = (string) $compareValue;
        }
        switch ($operator) {
            case '==':
                return $value == $compareValue;
            case '===':
                return $value === $compareValue;
            case '!=':
                return $value != $compareValue;
            case '!==':
                return $value !== $compareValue;
            case '>':
                return $value > $compareValue;
            case '>=':
                return $value >= $compareValue;
            case '<':
                return $value < $compareValue;
            case '<=':
                return $value <= $compareValue;
            default:
                return false;
        }
    }

等于用==而非strcmp时，'00' == '000' 返回真。参考示例代码：

if('00' == '0') {
    echo '00 == 0';
}
else echo '00 != 0';

输出：'00 == 0'

这个问题说明compare的type=string的时候，运算符有待商榷，给官方提一个issue。