10 recommended articles about php popen() function

1. How does PHP popen realize the concurrent execution of multiple processes? The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes to be started. How to start 5 processes at a time, close one process every time it is completed, and start the next process at the same time, which means that only 5 processes can be executed at the same time. //Start 2 processes for($i = 0;$i < 2;$i++){ $command = "$phpPath $destPHPFile >> $logFile$i"; echo "Process start time".date('Y-m-d H:i:s')."\n"; $resource = popen($command,'r'); if(is

1. Recommended articles about php pclose() function

##Introduction: 1. How does PHP popen realize the concurrent execution of multiple processes? The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes to be started, how to start 5 processes each time , and every time a process is completed, one process is closed and the next process is opened at the same time, which means that only 5 processes can be executed at the same time at most //Start 2 processes for($i = 0;$i < 2;$i++){ $command = "$phpPath $destPHPFile >> $logF...

2. How does popen implement concurrent execution of multiple processes? pclose in the loop will wait for the process to complete Then proceed to the next cycle

Introduction: 1. How does PHP popen realize the concurrent execution of multiple processes. The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes need to be started. How to start 5 processes at a time, close one process every time it is completed, and start the next process at the same time, which means that at most...

3. ffmpeg - php uses the popen method to implement asynchronous operations

Introduction: Use the popen method to perform a video transcoding operation. Asynchronous execution, how to know that the transcoding is completed?

##Introduction: Use the popen method to perform a video transcoding operation. In order for the transcoding to be executed asynchronously, how do you know that the transcoding is completed? .

##5. The popen function calls the local script and passes the parameters

##Introduction: The boss wants me to implement a php asynchronous For the function of sending emails, I searched for information on the Internet and found that popen can be used, so I initially wrote it like this: {Code...} This script uses phpmailer to send an email to my account. Now I want to pass parameters to this function: $to--recipient $content--within...

6. How to obtain root permissions on a mobile phone and let PHP execute system commands with ROOT permissions

Introduction: How to obtain root permissions on mobile phones: How to obtain root permissions on mobile phones and let PHP execute system commands with ROOT permissions: Used as a solution to the problem that some ordinary users cannot execute php with root permissions. A reference to a command or application. In fact, the popen() function in PHP can solve this problem, but due to system security considerations in some versions of Linux (such as Centos 5 I use), it makes solving this problem a lot more troublesome. Let’s first look at an example of a netizen using the popen() function. Copy the code as follows:/* How to add a system user in PHP. The following is a routine to add a user named james, roo

7. PHP Dangerous Functions Complete Analysis

Introduction:: Full analysis of PHP dangerous functions: When compiling PHP, if there is no special need, it must be prohibited to compile and generate PHP parsing support for CLI command line mode. Can be compiled using –disable-CLI. Once PHP in CLI mode is compiled and generated, an intruder may use the program to establish a WEB Shell backdoor process or execute arbitrary code through PHP. phpinfo() function description: Output PHP environment information and related module, WEB environment and other information. Danger level: Medium passthru() function description: Allow execution

8. How to let PHP execute system commands with ROOT permissions_PHP tutorial

Introduction: Let PHP execute system commands with ROOT permissions method. It is used as a reference to solve the problem of php executing some commands or applications that ordinary users cannot execute with root permissions. In fact, the popen() function in php can solve this problem, but due to some versions

9. linux exec and shell_exec function_PHP tutorial

Introduction: linux exec and shell_exec functions. ?php tutorial $test = ls /tmp/test; $out = shell_exec($test); echo $out; ? The return results of popen, passthru, proc_open, shell_exec are as follows: [root@krlcgcms01 shell]# php test.php 1001 .log 1

10. php popen implements multitasking_PHP tutorial

Introduction: php popen implements multitasking . Php code?php $update_num = 1000; $limit = 100; $p_num = 0; $line_cmd = ps -ef | grep doit.php | grep -v grep | wc -l; $exec_cmd = /usr/local/php/ bin/php doit.php %s /dev/null 21;

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