PHP 变量实例 - 自学教程(runoops.com)

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>PHP 变量 实例 - 自学教程(runoops.com)</title>
</head>
<body>
​
    <?php
    $txt = "Hello world!";
    $x = 5;
    $y = 10.5;
    echo $txt;
    ?>
​
</body>
​
</html>