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List of the contents of this article:

• 1,Hearthstone arena class win rates reddit Rookie Help: Why some commands always fail to call system commands in PHP
< Li style='margin-bottom: 3px;list-style: none'>2. phplinux common command linuxphp command< Li style='margin-bottom: 3px;list-style: none'>3, php how to execute linux's curl command
• 4, How to execute linux commands through PHP
5, How to let PHP execute LINUX commands through ROOT permission
• 6, PHP executes linux system command

Rookie Help: Why do some commands always fail to call system commands in PHP

1. In safe mode, only external programs in a specific directory can be executed, for other programs The call will be rejected. This directory can be specified by using the safe_mode_exec_dir instruction in the PhP.ini file, or by adding the --with-exec-dir option to compile PHP.

2. There are 2 functions in php that cannot execute system commands. According to the public information related to the query, the two functions are assert. When exception=0, Warning: assert (): assert (1=2). Deprecated: assert (): Callingassert () withastringargumentisdeprecated.

3. If you call an external command that should be able to output the result (which means that the PHP script has no errors), but you get a blank space, then it is likely that your network manager has run PHP in safe mode.

4. Solve the officeMethod: Enter under the cmd command line: sc delete mysql to delete the mysql service. When we use the sc delete service name in cmd to delete the service, an error is reported. SC OpenService failed 5: Access denied, which seems to be due to insufficient permissions.

5. This upgrade method is also suitable for refreshing the system BIOS, etc., but the parameters of the FLASH command are different and the file names of the updated FIRMWARE and BIOS are different. Please refer to the instructions of the server for the parameters.

6. Mysql has been installed before, and MySQL in the system service should be deleted and MySQL service should be left. Solution: Enter under the cmd command line: sc delete mysql to delete the mysql service.

phplinux common command linuxphp command

You need to install and configure PHP when running the web server, and then you can use the web browser to access the output of the PHP program, that is, browse the PHP page of the server.If it's just an experimental PHP programming, all of these can be run on your home computer. Please refer to the installation chapter for more information. (2) Command line script.

General asynchronous executable file exec.phpsleep (8); data=---type.date (Y-m-dH: i: s).---n; file_put_contents (../log.txt, $da Ta, FILE_APPEND); popen opens the process file pointer through the popen() function, so that the script file can be executed asynchronously.

After installing PHP and Apache2, we need to install the PHP command line interpreter.

Only call the command and output the running result of the command directly to the standard output device as it is.

Let Apache treat the PHP file as a code file to execute AddTypeapplication/x-httpd-php.php.phtml. If LZ is a beginner and can't configure the PHP running environment, it is recommended that you search for XA. MPP, this is a PHP fool package under Linux, which directly deploys Apache, PHP, MYSQL, etc. automatically.

How to execute linux's curl instructions

There are several ways to execute system commands in PHP: system(): and syste in C language M() functionThe usage is the same. The parameter is the command line. If it succeeds, it will return the last line of the command output, and if it fails, it will return FALSE. Shell_exec (): execute the command, and then return the stdout output after the command is executed.

PHP uses cURL to set the method of Get and Post requests: first initialize [curl_init()] and set the variable; then execute and get the result [curl_exec()]; finally release the cURL handle [curl_clos E ()].

Just initiate a request directly based on curl. As for the requirement of pushing once each time, you can do it by timing and only execute it once at a time.

How to execute linux commands through PHP

1, echo /var/www/html/infophp.php Then, visit the browser http://10.1/infop Hp.php, which will open the file in the web browser. Checking PHP information does not require any browser, and the same result can be obtained in the Linux terminal.

2. php can use system or exec to execute linux commands, as long as safemode is turned on, but some systems that do not execute commands are not allowed to be called. If you want to use some commands such as zip, write them directly with php. Just exec that sh in a shell script file.

3. There are several ways to execute system commands in PHP: system (): the usage of the system() function in C language is the same. The parameter is the command line, and the last line of the command output is returned if it fails, and FALSE is returned if it fails. Shell_exec (): execute the command, and then return the stdout output after the command is executed.

4. The method we take is to write a service with VC. The running identity of the service is root, that is, give it the maximum permission, and php calls the service for operation. Of course, there is another way. This is my guess. You might as well try to change the running user of php to root, which may have certain risks.

How to let PHP execute LINUX commands through ROOT permission

Change the running user of php to root, which may have certain risks. Specify in apache that you can operate on a file or directory with a root permission, which has not been tested. If you can succeed in the experiment, please give me feedback.

First, start the system and log in as a guest, as shown in the figure below. After logging in, there will be a prompt, and the operations performed will disappear after exiting. At this time, open the terminal and want to switch to root mode, as shown in the figure below. Then click the icon in the upper right corner to select root user or switch user, as shown in the figure below.

We can use phpinfo (), a very valuable debugging tool, directly on the Linux command line without calling from the file. Just execute the following command: php -r phpinfo (); PHP debugging tool Here, '-r' option It will allow the PHP code to be executed directly in the Linux terminal without the sum tag.

After installing the pagoda and creating the website, there is a .user.ini file in the site directory, which is the PHP access directory permission limit. At this time, I want to modify this file, but the problem comes. You can see that the owner and the group they belong to are both root, but even the root user cannot change this file.

This is because in general, PHP is a module of APACHE, that is to say, PHP is part of APACHE, and APACHE cannot execute commands with different user IDs except for the suEXEC mechanism, but the suEXEC mechanism can only be valid for CGI.

PHP executes linux system command

1. After installing PHP and Apache2, we need to install the PHP command line interpreter.

2. Specific execution process: first run the Web server, then install and configure php, and finally use the web browser to access the output of the php program, that is, browse the php page (or data output) of the server.

3. Command line script. You can write a PHP script without any server or browser to run it. In this way, only a PHP parser is needed to execute. This usage is an ideal choice for daily running scripts that rely on cron (Unix or Linux environment) or TaskScheduler (Windows environment).

4. php can use system or exec to execute linux commands, as long as safemode is turned on, but some commands at the bottom of the system are not allowed to be called. If you really want to use some commands such as zip, write them directly with php. Just exec that sh in a shell script file.

5. The method we take is to write a service with VC. The running identity of the service is root, that is, give it the maximum permission, and php calls the service to operate. Of course, there is another way. This is my guess. You might as well try to change the running user of php to root, which may have certain risks.