PHP数组遍历语法讲解
欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 PHP是一门编写WEB开发的脚本语言,对于它我想大家也有深入的理解了,这里我就PHP数组遍历和大家探讨一下,希望对大家有帮助。 关于Apache 2.0和PHP5.0安装详解 高手指南PHP安装配置 主流Apache 2 PHP
欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入
PHP是一门编写WEB开发的脚本语言,对于它我想大家也有深入的理解了,这里我就PHP数组遍历和大家探讨一下,希望对大家有帮助。
关于Apache 2.0和PHP5.0安装详解
高手指南PHP安装配置
主流Apache 2 PHP5安装使用介绍
深入学习PHP配置
PHP数组循环操作详细介绍
我们大家都认识到了数组的优越性,现在我们将学习怎样PHP数组遍历中的数据。这种操作数组方法的应用是非常普遍的,我相信你会掌握得很好。比如你的网站存有大量的网址数据,你想在一个页面显示门户网站网址,这些数据已经保存到了一个数组变量$url里,那么怎样把这些数据一个一个输出到网页里呢?你还想象上节课那样一个一个echo输出吗?别忘了数据量是非常大而且数据的个数是经常变化的噢。
PHP数组遍历语法:
foreach(array_expressionas$key=>$value)statement
第二种格式做同样的事,只除了当前单元的键值也会在每次循环中被赋给变量$key.
例如1:
注:当foreach开始执行时,数组内部的指针会自动指向第一个单元。这意味着不需要在foreach循环之前调用reset()。注:此外注意foreach所操作的是指定数组的一个拷贝,而不是该数组本身。因此即使有each()的构造,原数组指针也没有变,数组单元的值也不受影响。注:foreach不支持用"@"来禁止错误信息的能力。

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