PHP command line usage introductory example tutorial, PHP command line example tutorial_PHP tutorial

php command line usage introductory example tutorial, php command line example tutorial

The examples in this article describe the usage of php command line and are shared with everyone for your reference. The specific usage analysis is as follows:

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.

Copy code The code is as follows:

PHP 5.2.17(cli) (built: Feb 2 2011 11:19:21)
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

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.

As shown below:

2. Run the php program in the command line

Running php from the command line is very easy. 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^_^.

Copy code 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 displayed result is as shown below:

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.

Copy code 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.

Copy code 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 it is. Use php –s

Copy code The code is as follows:

-bash-3.2$ php -s hello.php


echo
'ddd'
;
style="color: #0000BB">?>



The display effect in the browser is as follows:

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

Copy code 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. I hope this article will be helpful to everyone’s PHP programming

PHP uses the command line to call the application. Online guidance. I will give you all my points. No problem.

Is there any error message? Check the security level of php.ini and see if the exec function is restricted

You cannot run php files using the php command line

Either PHP is not installed in your system; or your PHP file has syntax errors.
Use: php -v command first to see if PHP version information will be displayed. If not, it means PHP installation An error occurred;
If there is no error, write a xx.php file with the content: Then save it and execute php -f xx. php command to see if it is running correctly.

http://www.bkjia.com/PHPjc/901288.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/901288.htmlTechArticlephp command line usage introductory example tutorial, php command line example tutorial This article describes the php command line usage, share it with For your reference. The specific usage analysis is as follows: Php is a non...