PHP遍历关联数组的方法介绍

2014 年 4 月 14 日3580

PHP遍历关联数组的方法介绍

发布者:chinaitlab

 日期:

2014-04-10 05:59:54 浏览次数:0 (共有_条评论)

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  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>";

  }

  ?>

  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: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

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