How to make a PHP script accept input of options and values ​​when executed in cli mode

Users who are used to Linux systems should know that many commands in Linux support the input of options and values, such as rm -f hello.txt, ls -al, netstat -tnl, etc. So what? How to make PHP scripts also support the input of options and values ​​when executed in cli mode? There are two methods:

Use the getopt() function

Suppose now you need a PHP script to support the input of three options:
-a: Do not accept value input
-b: accept value input
-c: Accept value input, and the value is optional

According to the above requirements, you can write a PHP script:

<code><span><span>function</span><span>main</span><span>(<span>$args</span>)</span> {</span>
    var_dump(<span>$args</span>);
}

<span>/*
 * 选项字符后面不带冒号，表示该选项不支持值输入
 * 选项字符后面带一个冒号，表示该选项支持值输入
 * 选项字符后面带两个冒号，表示该选项支持值输入，且值可选
 */</span><span>$args</span> = getopt(<span>'ab:c::'</span>);
main(<span>$args</span>);</code>

Then use the command to execute the script. Here, Linux is used as an example, and assuming the script is named test.php, note. No need for -f option between /php and test.php:
./php test.php -a -b=valueOfB -c=valueOfC

Output:

because the value of c option is optional , let’s try what happens if option c does not pass a value:

As you can see, the array value corresponding to the option without a value is false

One thing to note here is that the options and values ​​are connected using the equal sign "=", or you can omit the equal sign, and you cannot use spaces. to separate options and values, such as -b valueOfB, otherwise the value may not be obtained.

getopt() also supports options starting with two dashes, such as --a. For details, please refer to the second parameter $longopts of getopt()

use the $argv variable

if only If you simply want to pass some values ​​to the script, you can use the variable $argv. For detailed information about this variable, please refer to: http://php.net/manual/zh/reserved.variables.argv.php

PHP script:

<code>var_dump(<span>$argv</span>);</code>

Execute command./php test.php valueOfA valueOfB valueOfC

Output:

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