高手讲解PHP遍历数组的方法

在PHP中数组分为两类： 数字索引数组和关联数组。其中数字索引数组和C语言中的数组一样，下标是为0，1，2…而关联数组下标可能是任意类型，与其它语言中的hash，map等结构相似。

下面介绍PHP中遍历关联数组的三种方法：

foreach

[c-sharp]

1. <?php
2. $sports = array(
3. 'football' => 'good',
4. 'swimming' => 'very well',
5. 'running' => 'not good'
6. );
8. foreach ($sports as $key => $value) {
9. echo $key.": ".$value."<br />";
10. }
11. ?>

<?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 />";

}

?>

程序运行结果：

football: good

swimming: very well

running: not good