PHP Multi-process implementation of pro-test

PHP Multi-process implementation

PHP has a set of process control functions (–ENABLE-PCNTL and POSIX extensions are required at compile time), which enables PHP to create sub-processes like C in the Nginx system, execute programs using the EXEC function, and process signals.

CentOS 6 under the Yum install PHP, the default is not to install PCNTL, so you need to compile the installation separately, first download the corresponding version of PHP, after decompression

1     CD php-version/ext/pcntl  2    phpize  3     ./configure && Make && make install  4     cp/usr/lib/php/modules/pcntl.so/usr/lib64/php/ Modules/pcntl. so   5     Echo "Extension=pcntl.so" >>/etc/php. INI   6     /ETC/INIT.D/HTTPD restart  

It's very convenient.

Here is the sample code:

1<?PHP2     Header(' Content-type:text/html;charset=utf-8 ' ); 3       4     //extension must be loaded5     if(!function_exists("Pcntl_fork")) {  6          die("Pcntl extention is must!")); 7     }  8     //the number of total processes9     $totals= 3; Ten     //number of scripts executed One     $CMDARR=Array();  A     //an array of the number of scripts executed -      for($i= 0;$i<$totals;$i++) {   -         $CMDARR[] =Array("Path" = __dir__. "/run.php", ' pid ' =$i, ' total ' =$totals);  the     }   -        -     /*  - Expand: $cmdArr + Array -     (  + [0] = = Array A             (  at [path] =/var/www/html/company/pcntl/run.php - [PID] = 0 - [Total] = 3 -             )  -       - [1] = = Array in             (  - [path] =/var/www/html/company/pcntl/run.php to [PID] = 1 + [Total] = 3 -             )  the       * [2] = = Array $             ( Panax Notoginseng [path] =/var/www/html/company/pcntl/run.php - [PID] = 2 the [Total] = 3 +             )  A       the     )  +     */   -        $Pcntl_signal (SIGCHLD, sig_ign);//If the parent process does not care what time the child process ends, the kernel is reclaimed after the child process is finished.  $     foreach($CMDARR   as   $cmd) {   -         $pid= Pcntl_fork ();//Create Child process - //parent and child processes will execute the following code the         if($pid= =-1) {   -             //error Handling: Returns 1 when creating a child process failure. Wuyi              die(' could not fork ');  the}Else if($pid) {   -             //The parent process gets the child process number, so this is the logic that the parent process executes Wu //If you do not need to block the process and want the exit status of the child process, you can comment out the pcntl_wait ($status) statement, or write: -Pcntl_wait ($status, Wnohang);//wait for the child process to break to prevent the child process from becoming a zombie process.  About}Else {   $             //the child process gets a $pid of 0, so here is the logic that the child process executes.  -             $path=$cmd["Path"];  -             $pid=$cmd[' PID '] ;  -             $total=$cmd[' Total '] ;  A             Echo exec("/usr/bin/php {$path} {$pid} {$total}")." \ n ";  +             Exit(0) ;  the         }   -     }   $?>

PHP Multi-process implementation of pro-test