php命令行用法入门实例教程_php技巧
本文实例讲述了php命令行用法,分享给大家供大家参考。具体用法分析如下:
Php是一个非常流行的web服务端脚本语言。其实,php不仅仅可以在web服务器中充当重要角色。在命令行一样可以执行。
本文中,笔者为各位介绍下php在命令行中的使用方法。
1、查看php的版本、配置
在命令行中输入php –v 即可查看当前php的版本。
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
with Zend Optimizer v3.3.9, Copyright (c) 1998-2009, by Zend Technologies
with eAccelerator v0.9.6.1, Copyright (c) 2004-2010 eAccelerator, by eAccelerator
其他的选项有: –m、-i。笔者在这里就不给出列子了。
-m 会显示当前php加载的有效模块。
-i 则输出无html格式的phpinfo。
使用 –ini 选项可以输出当前php加载ini配置文件的数量、路径信息。
如下图所示:
2、在命令行中运行php程序
从命令行运行php非常简单。但有些注意事项需要各位了解下。诸如$_SESSION之类的服务器变量是无法在命令行中使用的,其他代码的运行则和web服务器中完全一样^_^。
?>
把上面的代码另存为hello.php 。在命令行中敲入 php –f hello.php。显示结果如下图所示:
在命令行中执行php文件的好处之一就是可以通过脚本实现一些计划任务的执行。而毋须通过web服务器^_^。
当然,我们也可以直接在php中调试代码:输入php –r 指令,会出现一个”>”符号。这表示已经进入到php的shell中,可以直接写代码,并执行。
> for($i=0;$i > echo "Number: {$i}\n";
> }
> '
Number: 0
Number: 1
还可以使用php –a 命令打开交互模式,输入一行代码,php会实时输出结果。
3、检测php语法、高亮输出
不用执行代码,我们可以在命令行下检测php文件的语法错误。
No syntax errors detected in hello.php
程序员经常会需要将php代码高亮原样输出,使用php –s 即可
<span style="color: #000000"> <br>
<span style="color: #0000BB"></span> <br>
<span style="color: #007700">echo </span> <br>
<span style="color: #DD0000">'ddd'</span> <br>
<span style="color: #007700">;<br></span><span></span>
style="color: #0000BB">?><br></span> <br>
在浏览器中的显示效果如下所示:
4、查看php手册
从php5.1.2开始,程序员们可以在php命令行下查看手册了,输入php –rf function。会打印出该函数的语法简介
Function [
- Parameters [2] {
Parameter #0 [
Parameter #1 [
}
}
如果要查看类使用 –rc;查看扩展使用 –re。
Php命令行的使用方法介绍到这里就结束了。希望本文所述对大家的PHP程序设计有所帮助

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