任何与PHP中的子进程等价的东西？

Question

在Java和Python,你有ProcessBuilder或子流程,让您轻松使用转义字符串例如启动一个进程模块["ls", "some unescaped directory name"]-他们也给你强大的工具,如访问从标准输出读取,标准错误.PHP的任何等价功能是否比仅仅更加智能和有用exec()？

Answer 1

允许您通过双向通信访问stdin、stdout和的最接近的等效项是。stderrproc_open()

这是文档中的示例：

<?php
$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
   2 => array("file", "/tmp/error-output.txt", "a") // stderr is a file to write to
);

$cwd = '/tmp';
$env = array('some_option' => 'aeiou');

$process = proc_open('php', $descriptorspec, $pipes, $cwd, $env);

if (is_resource($process)) {
    // $pipes now looks like this:
    // 0 => writeable handle connected to child stdin
    // 1 => readable handle connected to child stdout
    // Any error output will be appended to /tmp/error-output.txt

    fwrite($pipes[0], '<?php print_r($_ENV); ?>');
    fclose($pipes[0]);

    echo stream_get_contents($pipes[1]);
    fclose($pipes[1]);

    // It is important that you close any pipes before calling
    // proc_close in order to avoid a deadlock
    $return_value = proc_close($process);

    echo "command returned $return_value\n";
}
?>

如果您只需要stdoutand stdin，则可以使用popen().

这是我修改后的示例，因为手册很糟糕：

<?php
$handle = popen('/path/to/executable', 'r');

$lines = [];
while (!feof($handle))
{
    $lines[] = fgets($handle);
}

pclose($handle);

这会将 的输出读/path/to/executable入输出行数组中。

您还询问了有关逃避争论的问题。你可以这样做escapeshellarg()：

$escapedArg = escapeshellarg($arg);