<?PHP
foreach($arr as $key => $value){
   some_function($key,$value); //This function does SSH and SFTP stuff
}
?>

这取决于您的实施. PHP中99％的函数都是阻塞的.在当前函数完成之前,意义处理将不会继续.但是,如果函数包含循环,则可以添加自己的代码,以在满足某个条件后中断循环.

像这样的东西：

foreach ($array as $value) {
  PErform_task($value);
}

function perform_task($value) {
  $start_time = time();

  while(true) {
    if ((time() - $start_time) > 300) {
      return false; // timeout,function took longer than 300 seconds
    }
    // Other PRocessing
  }
}

另一个不可能中断处理的例子：

foreach ($array as $value) {
  perform_task($value);
}

function perform_task($value) {
    // preg_replace is a blocking function
    // There's no way to break out of IT after a certain amount of time.
    return preg_replace('/pattern/','replace',$value);
}