pcntl_fork
(PHP 4 >= 4.1.0)
pcntl_fork -- Forks the currently running process
Description
int pcntl_fork ( void )
The pcntl_fork() function creates a child process that differs
from the parent process only in its PID and PPID. Please
see your system's fork(2) man page for specific details
as to how fork works on your system.
On success, the PID of the child process is returned in
the parent's thread of execution, and a 0 is returned in
the child's thread of execution. On failure, a -1 will be
returned in the parent's context, no child process will
be created, and a PHP error is raised.
Example 1. pcntl_fork() example
<?php
$pid = pcntl_fork();
if ($pid == -1) {
die("could not fork");
} else if ($pid) {
// we are the parent
} else {
// we are the child
}
?>
See also pcntl_waitpid() and pcntl_signal().
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