PHP中遍历关联数组的方法

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于 2013-12-22 11:23:57 发布

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本文链接：https://blog.youkuaiyun.com/qianglee/article/details/17482879

本文介绍了使用PHP遍历关联数组的三种方法：foreach循环、each函数及结合list和each使用。通过实例展示了如何利用这些方法有效地遍历并操作关联数组。

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下面介绍PHP中遍历关联数组的三种方法：
foreach

<?php  
$sports = array(  
    'football' => 'good',  
    'swimming' => 'very well',  
    'running'  => 'not good'  
    );  
      
foreach ($sports as $key => $value) {  
    echo $key.": ".$value."<br />";  
}  
?>

程序运行结果：
football: good
swimming: very well
running: not good

each

<?php
$sports = array(
    'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good'
);

while ($elem = each($sports)) {
    echo $elem['key'].": ".$elem['value']."<br />";
}
?>

程序运行结果：
football: good
swimming: very well
running: not good

list & each

<?php
$sports = array(
    'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good'
);

while (list($key, $value) = each($sports)) {
    echo $key.": ".$value."<br />";
}
?>