exec

exec

Execute an external program

 **exec** string $command array $output int $result_code

executes the given

. exec``command

commandThe command that will be executed.

output If the argument is present, then the specified array will be filled with every line of output from the command. Trailing whitespace, such as , is not included in this array. Note that if the array already contains some elements, will append to the end of the array. If you do not want the function to append elements, call on the array before passing it to . output``\n``exec``unset``exec

result_code If the argument is present along with the argument, then the return status of the executed command will be written to this variable. result_code``output

The last line from the result of the command. If you need to execute a command and have all the data from the command passed directly back without any interference, use the function. passthru

Returns false on failure.

To get the output of the executed command, be sure to set and use the parameter. output

Emits an if is unable to execute the . E_WARNING``exec``command

Throws a if is empty or contains null bytes. ValueError``command

Voorbeeld: An example

<?php
// outputs the username that owns the running php/httpd process
// (on a system with the "whoami" executable in the path)
$output=null;
$retval=null;
exec('whoami', $output, $retval);
echo "Returned with status $retval and output:\n";
print_r($output);
?>

Returned with status 0 and output:
Array
(
    [0] => cmb
)

system``passthru``escapeshellcmd``pcntl_execbacktick operator