PHP 数组遍历方法大全(foreach,list,each)

PHP 2018-12-30

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：

方法1：foreach

<div class="codetitle"><a style="CURSOR: pointer" data="91012" class="copybut" id="copybut91012" onclick="doCopy('code91012')"> 代码如下:

<div class="codebody" id="code91012">
<?PHP
$sports = array(
'football' => 'good',
'swimming' => 'very well',
'running' => 'not good');
foreach ($sports as $key => $value) {
echo $key.": ".$value."
";
?>

输出结果： football: good
swimming: very well
running: not good

方法2：each

<div class="codetitle"><a style="CURSOR: pointer" data="82726" class="copybut" id="copybut82726" onclick="doCopy('code82726')"> 代码如下:

<div class="codebody" id="code82726">
<?PHP
$sports = array(
'football' => 'good',
'running' => 'not good');
while ($elem = each($sports)) {
echo $elem['key'].": ".$elem['value']."
";
?>

方法3：list & each

<div class="codetitle"><a style="CURSOR: pointer" data="60699" class="copybut" id="copybut60699" onclick="doCopy('code60699')"> 代码如下:

<div class="codebody" id="code60699">
<?PHP
$sports = array(
'football' => 'good',
'running' => 'not good');
while (list($key,$value) = each($sports)) {
echo $key.": ".$value."
";
?>

PHP 数组遍历

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