PHP初记(2) - extract()方法
PHP小记(2) - extract()方法
定义和用法
PHP extract() 函数从数组中把变量导入到当前的符号表中。
对于数组中的每个元素,键名用于变量名,键值用于变量值。
第二个参数 type 用于指定当某个变量已经存在,而数组中又有同名元素时,extract() 函数如何对待这样的冲突。
本函数返回成功设置的变量数目。
一般用途:
extract($_REQUEST)
extract($_GET)
extract($_POST)
?
这样可以把提交上来的参数直接转换为$变量名和变量值。

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