php interprets command line arguments

In php cli mode, you can use $argc, $argv to read all parameters and their numbers, such as:

ghostwu@ghostwu:~/php/php1/1$ cat go1
#!/usr/bin/php
<?php

    echo 'Number of arguments:' . $argc . PHP_EOL ;
     echo 'Print arguments:' . PHP_EOL ;
     print_r ( $argv ) . PHP_EOL ;

Add executable permissions to the file:

ghostwu@ghostwu:~/php/php1/1$ ls -l
total 8 
-rwxrwxr-x 1 ghostwu ghostwu 337 4   22  09 : 15 go
 -rw-rw-r-- 1 ghostwu ghostwu 126 4   22  09 : 20 go1
ghostwu@ghostwu:~/php/php1/1$ chmod a+x go1
ghostwu@ghostwu:~/php/php1/1$ ls -l
total 8 
-rwxrwxr -x 1 ghostwu ghostwu 337 4   22  09 : 15 go
 -rwxrwxr -x 1 ghostwu ghostwu 126 4   22  09 : 20 go1
ghostwu@ghostwu:~/php/php1/1$ ./go1
Number of parameters: 1
print parameters:
Array
(
    [0] => ./go1
)
ghostwu@ghostwu:~/php/php1/1$ ./go1 a b c
Number of parameters: 4
print parameters:
Array
(
    [0] => ./go1
    [1] => a
    [2] => b
    [3] => c
)

If we want to execute the file go1 in any directory of the operating system, we need to add environment variables. I create a directory mybin under the home directory to put the commands developed by myself.

ghostwu@ghostwu:~/mybin$ tail -2 ~/.bashrc
fi
export PATH=~/mybin:$PATH
ghostwu@ghostwu:~/mybin$ pwd
/home/ghostwu/mybin
ghostwu@ghostwu:~/mybin$

ghostwu@ghostwu:~/mybin$ echo $PATH
/home/ghostwu/mybin:/home/ghostwu/bin:/home/ghostwu/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
ghostwu@ghostwu:~/mybin$

Print $PATH again, it has been added. At this time, copy the developed command to the ~/mybin directory, and then you can execute go1 in any directory of the system

ghostwu@ghostwu:~/mybin$ cp ~/php/php1/1/go1 .
ghostwu@ghostwu:~/mybin$ ls -l
total 8 
-rwxrwxr -x 1 ghostwu ghostwu 126 4   22  09 : 44 go1

ghostwu@ghostwu:~/mybin$ go1
Number of parameters: 1
print parameters:
Array
(
    [0] => /home/ghostwu/mybin/go1
)
ghostwu@ghostwu:~/mybin$ cd /
ghostwu@ghostwu:/$ go1
Number of parameters: 1
print parameters:
Array
(
    [0] => /home/ghostwu/mybin/go1
)
ghostwu@ghostwu:/$ cd /tmp
ghostwu@ghostwu:/tmp$ go1
Number of parameters: 1
print parameters:
Array
(
    [0] => /home/ghostwu/mybin/go1
)

Under the Linux command line, many commands or software have a -v parameter to display the version number. How to do this function?

$res = '';
if( $argc >= 2 ) $argv[1] == '-v' && $res = 'go version is 1.0';
    echo $res . PHP_EOL;

Isn't it very simple, 3 lines of code can be done

ghostwu@ghostwu:~/mybin$ go - v
go version is 1.0
ghostwu@ghostwu:~/mybin$ ls -l
total 8 
-rwxrwxr -x 1 ghostwu ghostwu 336 4   22  09 : 49 go
 -rwxrwxr -x 1 ghostwu ghostwu 126 4   22  09 : 44 go1
ghostwu@ghostwu:~/mybin$

php interprets command line arguments

Guess you like