变量覆盖

0x01 常见的变量覆盖的函数

1.extract（）将键值“So7cool" "Best" 赋值给 "a" "b" 通俗的讲，将对应的键值赋给对应的键名。

<?php
$a = "So7cool";
$my_array = array("a" => "So7cool","b" => "Best");
extract($my_array);
echo "\$a = $a \$b = $b"
?>
输出结果：$a = So7cool $b = Best

 语法：extract（array，extract_rules，prefix)