pcntl_wait

pcntl_wait

Waits on or returns the status of a forked child

int **pcntl_wait** int $status int $flags array $resource_usage

The wait function suspends execution of the current process until a child has exited, or until a signal is delivered whose action is to terminate the current process or to call a signal handling function. If a child has already exited by the time of the call (a so-called "zombie" process), the function returns immediately. Any system resources used by the child are freed. Please see your system's wait(2) man page for specific details as to how wait works on your system.

Opmerking: > This function is equivalent to calling with a and no . pcntl_waitpid``-1``process_id``flags

status will store status information in the parameter which can be evaluated using the following functions: , , , , and . pcntl_wait``status``pcntl_wifexited``pcntl_wifstopped``pcntl_wifsignaled``pcntl_wexitstatus``pcntl_wtermsig``pcntl_wstopsig

flags If wait3 is available on your system (mostly BSD-style systems), you can provide the optional parameter. If this parameter is not provided, wait will be used for the system call. If wait3 is not available, providing a value for will have no effect. The value of is the value of zero or more of the following two constants 'ed together:

  `flags``flags``flags``OR`




returns the process ID of the

child which exited, -1 on error or zero if WNOHANG was provided as an option (on wait3-available systems) and no child was available. pcntl_wait

pcntl_fork``pcntl_signal``pcntl_wifexited``pcntl_wifstopped``pcntl_wifsignaled``pcntl_wexitstatus``pcntl_wtermsig``pcntl_wstopsig``pcntl_waitpid