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<html>
<head>
<title>
PHP 5+MySQL专题练习</title>
</head>
<body>
<?php
$op1 = true;
$op2 = false;
echo $op1 == $op2; // output true == false
echo "<br>";
echo $op1 != $op2; // output true != false
echo "<br>";
echo $op1 < $op2; // output true < false
echo "<br>";
echo $op1 > $op2; // output true > false
echo "<br>";
echo $op1 <= $op2; // output true <= false
echo "<br>";
echo $op1 >= $op2; // output true >= false
echo "<br>";
?>
</body>
</html>