试试下面的例子就明白了所有的赋值运算符。复制并粘贴到test.php文件，将下面的PHP程序，保存它到PHP服务器的文档根目录，使用任何浏览器浏览。
<html>
<head><title>PHP赋值运算符示例</title><head>
<body>
<?php
$a = 42;
$b = 20;
$c = $a + $b; /* Assignment operator */
echo "Addtion Operation Result: $c <br/>";
$c += $a; /* c value was 42 + 20 = 62 */
echo "Add AND Assigment Operation Result: $c <br/>";
$c -= $a; /* c value was 42 + 20 + 42 = 104 */
echo "Subtract AND Assignment Operation Result: $c <br/>";
$c *= $a; /* c value was 104 - 42 = 62 */
echo "Multiply AND Assignment Operation Result: $c <br/>";
$c /= $a; /* c value was 62 * 42 = 2604 */
echo "Division AND Assignment Operation Result: $c <br/>";
$c %= $a; /* c value was 2604/42 = 62*/
echo "Modulus AND Assignment Operation Result: $c <br/>";
?>
</body>
</html>
这将产生以下结果
Addtion Operation Result: 62 Add AND Assigment Operation Result: 104 Subtract AND Assignment Operation Result: 62 Multiply AND Assignment Operation Result: 2604 Division AND Assignment Operation Result: 62 Modulus AND Assignment Operation Result: 20
