ext-uv/examples/spawn.php

<?php

$out = uv_pipe_init(uv_default_loop,0);
$process = uv_spawn(uv_default_loop(), "php", array('-r','var_dump($_ENV);'), array(
    "cwd" => "/usr/bin/",
    "pipes" => array(
        $out,
    ),
    "env" => array(
        "KEY" => "VALUE",
        "HELLO" => "WORLD",
    )
),function($process, $stat, $signal){
    echo "spawn_close_cb\n";
    
    var_dump($process);
    var_dump($stat);
    var_dump($signal);
    
    uv_close($process,function(){
        echo "close";
    });
});

uv_read_start($out,function($buffer,$stat) use ($out){
    var_dump($out);
    var_dump($stat);
    var_dump($buffer);
    uv_close($out,function(){
    });

});

uv_run();