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4.x is outdated, please check the latest version 22.x
Latest version:
pecl install openswoole-22.1.2
<?php Swoole\Coroutine\System::exec(string $cmd): array
The Linux command you want to execution on the command line. A shell instruction.
Returns an array which contains information about the command during its execution. If the command failed to execution, then false is returned.
Execute a Linux command within a coroutine context, this method does not block other processes.
Note: You should consider using coroutine hooks because they allow you to use native PHP functions. The Coroutine System API was mainly used before coroutine hooks were implemented. Checkout the supported hook for exec() or shell_exec(): SWOOLE_HOOK_BLOCKING_FUNCTION.
<?php
go(function()
{
$result = Co\System::exec("md5sum " . __FILE__);
var_dump($result);
});
Output:
<?php
array(3) {
["code"]=>
int(0)
["signal"]=>
int(0)
["output"]=>
string(56) "2cbbb45d3dde31c1bad89a5fb60feb79 /root/swoole.php"
}
We get the status code of the command, the exit signal and the actual contents if the command returned any result.