php遍历目录，生成目录下每个文件的md5值并写入到结果文件中

实例代码：

<?php
  
/**
 * @author Administrator
 *
 */
class TestGenerate {
  public static $appFolder = "";
  public static $ignoreFilePaths = array (
    "xxxx/xxx.php"
  );
  public static function start() {
    $AppPath = "E:\\myApp";
    TestGenerate::$appFolder = $AppPath;
    $destManifestPath = "E:\\temp2\\dest.md5.txt";
      
    // dest file handle
    $manifestHandle = fopen ( $destManifestPath, "w+" );
      
    // write header
    TestGenerate::writeMaifestHeader ( $manifestHandle );
      
    // write md5
    TestGenerate::traverse ( $AppPath, $manifestHandle );
      
    // write footer
    TestGenerate::writeMaifestFooter ( $manifestHandle );
      
    // close file
    fclose ( $manifestHandle );
  }
    
  /**
   * 遍历应用根目录下的文件，并生成对应的文件长度及md5信息
   *
   * @param unknown $AppPath
   *     应用根目录，如：xxx/xxx/analytics
   * @param string $destManifestPath
   *     生成的manifest文件存放位置的文件句柄
   */
  public static function traverse($AppPath, $manifestHandle) {
    if (! file_exists ( $AppPath )) {
      printf ( $AppPath . " does not exist!" );
      return;
    }
    if (! is_dir ( $AppPath )) {
      printf ( $AppPath . " is not a directory!" );
      return;
    }
    if (! ($dh = opendir ( $AppPath ))) {
      printf ( "Failure while read diectory!" );
      return;
    }
      
    // read files
    while ( ($file = readdir ( $dh )) != false ) {
      $subDir = $AppPath . DIRECTORY_SEPARATOR . $file;
        
      if ($file == "." || $file == "..") {
        continue;
      } else if (is_dir ( $subDir )) {
        // rescure
        TestGenerate::traverse ( $subDir, $manifestHandle );
      } else {
        // Sub is a file.
        TestGenerate::writeOneFieToManifest ( $subDir, $manifestHandle );
      }
    }
      
    // close dir
    closedir ( $dh );
  }
    
  /**
   * 写一个文件的md5信息到文件中
   *
   * @param unknown $filePath    
   * @param unknown $fileHandle     
   */
  public static function writeOneFieToManifest($filePath, $fileHandle) {
    if (! file_exists ( $filePath )) {
      continue;
    }
      
    $relativePath = str_replace ( TestGenerate::$appFolder . DIRECTORY_SEPARATOR, '', $filePath );
    $relativePath = str_replace ( "\\", "/", $relativePath );
      
    // ignore tmp directory
    if (strpos ( $relativePath, "tmp/" ) === 0) {
      return;
    }
      
    $fileSize = filesize ( $filePath );
    $fileMd5 = @md5_file ( $filePath );
      
    $content = "\t\t";
    $content .= '"';
    $content .= $relativePath;
    $content .= '"';
    $content .= ' => array("';
    $content .= $fileSize;
    $content .= '","';
    $content .= $fileMd5;
    $content .= '"),';
    $content .= "\n";
      
    if (! fwrite ( $fileHandle, $content )) {
      print ($filePath . " can not be written!") ;
    }
  }
    
  /**
   * 在manifes文件中写入头信息
   *
   * @param unknown $fileHandle     
   */
  public static function writeMaifestHeader($fileHandle) {
    $header = "<?php";
    $header .= "\n";
    $header .= "// This file is automatically generated";
    $header .= "\n";
    $header .= "namespace test;";
    $header .= "\n";
    $header .= "class MyFile {";
    $header .= "\n";
    $header .= "\tstatic \$allFiles=array(";
    $header .= "\n";
      
    if (! fwrite ( $fileHandle, $header )) {
      printf ( "Failure while write file header." );
    }
  }
    
  /**
   * 在manifes文件中写入尾部信息
   *
   * @param unknown $fileHandle     
   */
  public static function writeMaifestFooter($fileHandle) {
    $footer = "\t);";
    $footer .= "\n";
    $footer .= "}";
    $footer .= "\n";
      
    if (! fwrite ( $fileHandle, $footer )) {
      printf ( "Failure while write file header." );
    }
  }
}
  
// Start application
TestGenerate::start ();
  
?>