演算子をオーバーロード

うぉっ、コレは凄いなぁ。（不具合の調査が大変になりそうだけど）面白い。
任意の名前を登録できればいいんだけどなぁ。。。今のトコ固定っぽい。

PHP_OPERATOR_BINARY_OP(ZEND_ADD, "__add")
PHP_OPERATOR_BINARY_OP(ZEND_SUB, "__sub")
PHP_OPERATOR_BINARY_OP(ZEND_MUL, "__mul")
PHP_OPERATOR_BINARY_OP(ZEND_DIV, "__div")
PHP_OPERATOR_BINARY_OP(ZEND_MOD, "__mod")
PHP_OPERATOR_BINARY_OP(ZEND_SL, "__sl")
PHP_OPERATOR_BINARY_OP(ZEND_SR, "__sr")
PHP_OPERATOR_BINARY_OP(ZEND_CONCAT, "__concat")
PHP_OPERATOR_BINARY_OP(ZEND_BW_OR, "__bw_or")
PHP_OPERATOR_BINARY_OP(ZEND_BW_AND, "__bw_and")
PHP_OPERATOR_BINARY_OP(ZEND_BW_XOR, "__bw_xor")
PHP_OPERATOR_UNARY_OP(ZEND_BW_NOT, "__bw_not")
PHP_OPERATOR_UNARY_OP(ZEND_BOOL, "__bool")
PHP_OPERATOR_UNARY_OP(ZEND_BOOL_NOT, "__bool_not")