php数组使用规则分析_PHP
本文实例分析了php中数组的使用规则。分享给大家供大家参考。具体分析如下:
数组在php中处于灰常重要的地位。字符串、图片、数码、视频等值都以数组的形式存在,所以了解清楚数组的各种规则十分必要。
1、键、值。
数组的基本形式:
array( [key =>] value , ... )
key=>value,其中,key只能是两种,integer、string。而value可以是各种形式,除了数字,其它值都须用''或""把string括起来。下面示例说明了规则:
<?php $a = array(-1=>2, -2=>3, '01'=>'99.jpg', 8, 'a', 'b'=>TRUE, NULL, "", 1.2=>0.5, ); print_r($a); ?>
输出结果:Array ( [-1] => 2 [-2] => 3 [01] => 99.jpg [0] => 8 [1] => 0.5 => 1 [2] => [3] => )
希望本文所述对大家的php程序设计有所帮助。

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