PHP变量与关联数组的相互转换 (extract 与 compact),工作中很实用！

compact 多个变量转数组

代码如下
<?php     //多个变量转数组     $name='phpff';     $email='[email protected]';     $info=compact('name','email');//传递变量名     print_r($info);     /*     Array     (         [name] => phpff         [email] => [email protected]     )     */ ?>

extract 数组转多个变量

代码如下
<?php //数组转多个变量     $capitalcities['England'] = 'London';     $capitalcities['Scotland'] = 'Edinburgh';     $capitalcities['Wales'] = 'Cardiff';     extract($capitalcities);//转变成三个变量 England，Scotland，Wales     print $Wales;//Cardiff ?>

例

代码如下
<?php $my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse"); extract($my_array); echo "$a = $a; $b = $b; $c = $c"; ?>

结果

$a = Cat; $b = Dog; $c = Horse