CascadiaPHP 2024


(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pcntl_execВыполняет указанную программу в пространстве текущего процесса


pcntl_exec(string $path, array $args = [], array $env_vars = []): bool

Функция выполняет программу с заданными аргументами.

Список параметров


Значение параметра path путь до исполняемой программы или скрипта с корректным указанием пути до интерпретатора в первой строке (например, #!/usr/local/bin/perl). Для получения дополнительной информации обратитесь к системному руководству execve(2).


args массив строк аргументов переданных программе


Значение параметра env_vars — массив строк, которые передали программе как переменные окружения. Массив формата name => value, где name — имя переменной окружения и value - значение переменной окружения.

Возвращаемые значения

Возвращает false.

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User Contributed Notes 3 notes

eric kilfoil
17 years ago
The pcntl_exec() function works exactly like the standard (unix-style) exec() function. It differs from the regular PHP exec() function in that the process calling the pcntl_exec() is replaced with the process that gets called. This is the ideal method for creating children. In a simple example (that does no error checking):

switch (pcntl_fork()) {
case 0:
$cmd = "/path/to/command";
$args = array("arg1", "arg2");
pcntl_exec($cmd, $args);
// the child will only reach this point on exec failure,
// because execution shifts to the pcntl_exec()ed command

// parent continues
echo "I am the parent";


since this is not being executed through a shell, you must provide the exact path from the filesystem root. Look at the execve() man page for more information.
agodong at verizon dot net
17 years ago
Some people might find it useful to run other program using the same process as a different user. This is very usefull if the script is running under root. Here is a simple code to achieve that under *nix PHP CLI:

#!/usr/bin/php -q
//Enter run-as user below (argument needed to be passed when the script is called), otherwise it will run as the caller user process.

$username = $_SERVER['argv'][1];

$user = posix_getpwnam($username);

I use this as a part of socket program so that a program can be run under different user from remote location.
rbemrose at vgmusic dot com
16 years ago
As a side note, if I'm reading the comments below correctly, you should not run this if you're using a PHP webserver module, as it will replace the webserver's process with whatever process you're telling it to run.
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