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php数组键值用法实例分析_PHP

WBOY
WBOYOriginal
2016-05-31 13:16:43734browse

本文实例讲述了php数组键值用法。分享给大家供大家参考。具体分析如下:

先看一个数组:

<?php
$switching = array(
  10, // key = 0
  5  => 6,
  3  => 7,
  'a' => 4,
  11, // key = 6 (整个数组中整型键索引最大的值是5)
  '8' => 2, // key = 8 (字符串健'8'转换为8)
  '02' => 77, // key = '02'(注意不是2)
  0  => 12 
  /*前面值为10的键被赋予0,而后面重新定义了0键的值为12,
  从而覆盖了前面默认的0键值*/
 );
// empty array
$empty = array();
?>

如果用print_r($switching)打印出来的话结果为:

Array ( [0] => 12 [5] => 6 [3] => 7 [a] => 4 [6] => 11 [8] => 2 [02] => 77 )

注意,两位数的02被排在后面。

希望本文所述对大家的php程序设计有所帮助。

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