如何正确实现PHP命令行读取参数
如果想实现PHP命令行读取参数,CLI可以从$_SERVER['argc']和$_SERVER['argv'']取得参数的个数和值。我们再建立一个文件,名字为testargs.php,脚本代码如下:
- #!C:phpphp.exe –q
- ?php
- //UNIX和Linux平台下应该为
#!/usr/local/bin/php –q - echo "测试获取参数:n";
- echo $_SERVER["argc"]."n";
- //显示传入的参数值,从索引1开始显示
- echo $_SERVER["argv"][1]."n";
- echo $_SERVER["argv"][2]."n";
- echo $_SERVER["argv"][3]."n";
- echo $_SERVER["argv"][4]."n";
- ?>
在命令行输入如下代码:
C:UsersJohn>testargs.php Always To Be Best
测试获取参数:
4
Always
To
Be
Best
因为我们输入了一串单词,为“Always To Be Best”,脚本参数以空格分隔。因此,PHP将其计为4个参数,下面对此说明。
$_SERVER["argc"]数组返回一个整型的数,代表从命令行上回车后一共输入了几个参数。
从PHP命令行读取参数范例中的结果已经看出,要访问已经传入的参数值,需要从索引1开始。因为脚本本身的文件已经占用了索引0,即$_SERVER["argv"][0]。

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