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

<?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 ();
 
?>