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
[*]<?php
[*]$sports = array(
[*] 'football' => 'good',
[*] 'swimming' => 'very well',
[*] 'running' => 'not good'
[*] );
[*]
[*]foreach ($sports as $key => $value) {
[*] echo $key.": ".$value."<br />";
[*]}
[*]?>
<?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
页:
[1]