php - RecursiveDirectoryIterator - 在路径中找到第一个字符串实例时发出信号

Question

我正在使用 RecursiveDirectoryIterator()。我有一种情况，我想向我的程序发出信号，应该在目录层次结构中指定字符串的第一个实例上创建一个文件。我希望 RecursiveDirectoryIterator() 适合这个，但如果有另一个更有意义的选择，我也愿意接受。
有关我的问题的详细信息，请参见下文...谢谢。

代码：

$in_dir = 'none';
$path = '.';
$dir  = new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::SKIP_DOTS);
$files = new RecursiveIteratorIterator($dir, RecursiveIteratorIterator::SELF_FIRST);

foreach($files as $object){
  //if this is a directory... find out which one it is.
  if($object->isDir()){
    if(strpos($object->getPathname(), 'dir1') == true){
      //i need a file (file1.txt) created here, upon the first instance found
      $in_dir = 'dir1';
    }else if(strpos($object->getPathname(), 'dir2') == true){
      //i need a file (file2.txt) created here, upon the first instance found
      $in_dir = 'dir2';
    }
}

Answer 1

您只需要记录您第一次访问该目录的时间...

$in_dir = 'none';
$path = '.';
$dir  = new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::SKIP_DOTS);
$files = new RecursiveIteratorIterator($dir, RecursiveIteratorIterator::SELF_FIRST);
// not seen yet
$foundDir1 = false;
$foundDir2 = false;

foreach($files as $object){
    //if this is a directory... find out which one it is.
    if($object->isDir()){
        if(strpos($object->getPathname(), 'dir1') == true){
            //i need a file (file1.txt) created here, upon the first instance found
            if (!$foundDir1) {
                // first time we've seen it, create file...

                // mark as found
                $foundDir1 = true;
            }
        }else if(strpos($object->getPathname(), 'dir2') == true){
            //i need a file (file2.txt) created here, upon the first instance found
            if (!$foundDir2) {
                // first time we've seen it, create file...

                // mark as found
                $foundDir2 = true;
            }
        }
    }
}