Php is a very popular web server-side scripting language. In fact, php can not only play an important role in the web server. It can also be executed from the command line.
In this article, the author introduces how to use php in the command line.
1. Check the version and configuration of php
Enter php -v on the command line to view the current php version.
Other options are: –m, -i. The author will not give any examples here.
-m will display the valid modules currently loaded by php.
-i outputs phpinfo without html format.
Use the –ini option to output the number and path information of the ini configuration files currently loaded by php.
2. Run the php program in the command line
Running php from the command line is very simple. But there are some precautions that you need to understand. Server variables such as $_SESSION cannot be used in the command line, and other code runs exactly the same as in the web server^_^.
The code is as follows:
echo "Run php command line echo";
?>
Save the above code as hello.php. Type php –f hello.php at the command line. The results are displayed as follows:
One of the benefits of executing php files on the command line is that you can execute some scheduled tasks through scripts. No need to go through the web server^_^.
Of course, we can also debug the code directly in php: enter the php -r command, and a ">" symbol will appear. This means that you have entered the PHP shell and can write code directly and execute it.
The code is as follows:
-bash-3.2$ php -r '
> for($i=0;$i<2;$i++){
> echo "Number: {$i}n";
> }
> '
Number: 0
Number: 1
You can also use the php –a command to open the interactive mode, enter a line of code, and php will output the results in real time.
3. Detect PHP syntax and highlight output
Without executing code, we can detect syntax errors in php files from the command line.
The code is as follows:
-bash-3.2$ php -l hello.php
No syntax errors detected in hello.php
Programmers often need to highlight the php code and output it as is, just use php –s
The code is as follows:
-bash-3.2$ php -s hello.php
echo
'ddd'
;
style="color: #0000BB">?>
Display effect in browser
4. View the php manual
Starting from php5.1.2, programmers can view the manual on the php command line and enter php –rf function. A syntax introduction to the function will be printed
The code is as follows:
-bash-3.2$ php --rf strip_tags
Function [ function strip_tags ] {
- Parameters [2] {
Parameter #0 [ $str ]
Parameter #1 [ $allowable_tags ]
}
}
To view classes use –rc; to view extensions use –re.
The introduction to how to use the Php command line ends here. Hope you all like it
