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php下最灵活的东西就是数组,很多数据都是通过数组的方式显示,整理下数组的遍历方法
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。 方法1:foreach 复制代码 代码如下: <?php $sports = array( 'football' => 'good', 'swimming' => 'very well', 'running' => 'not good'); foreach ($sports as $key => $value) { echo $key.": ".$value."<br />"; } ?> 输出结果: football: good swimming: very well running: not good 方法2:each 复制代码 代码如下: <?php $sports = array( 'football' => 'good', 'swimming' => 'very well', 'running' => 'not good'); while (!!$elem = each($sports)) { echo $elem['key'].": ".$elem['value']."<br />"; } ?> 输出结果: football: good swimming: very well running: not good
方法3:list & each 复制代码 代码如下: <?php $sports = array( 'football' => 'good', 'swimming' => 'very well', 'running' => 'not good'); while (!!list($key, $value) = each($sports)) { echo $key.": ".$value."<br />"; } ?> 输出结果: football: good swimming: very well running: not good |
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