遍历目录并生成缩略图的PHP程序

gistfile1.php

<?php
/**
 * 生成缩略图
 */
function makethumb ($srcFile, $dstFile, $dstW, $dstH) {
	$dstW = intval($dstW);
	$dstH = intval($dstH);

	if($dstW == 0 && $dstH == 0)
		return false;

	$size = @GetImageSize($srcFile,$info);

	$newWidth = $size[0];
	$newHeight = $size[1];

	if($size[0] > $dstW) {
		$newWidth = $dstW;
		$newHeight = intval(($newWidth / $size[0]) * $size[1]);
	}
	if($newHeight > $dstH) {
		$newHeight = $dstH;
		$newWidth = intval(($newHeight / $size[1]) * $size[0]);
	}
	
	if($newWidth == 0 || $newHeight == 0)
		return false;
  
	switch ($size[2]) {
		case 1:
			$im = @ImageCreateFromGIF($srcFile);
			break;
		case 2:
			$im = @imagecreatefromjpeg($srcFile);    
			break;
		case 3:
			$im = @ImageCreateFromPNG($srcFile);    
			break;
	}
	if($im) {
		$srcW= $size[0];
		$srcH= $size[1];

		$ni=@imagecreatetruecolor($newWidth,$newHeight);
		if($ni) {
			if(@ImageCopyResized($ni,$im,0,0,0,0,$newWidth,$newHeight,$srcW,$srcH)) {
        switch ($size[2]) {
          case 1:
            return @ImageGif($ni,$dstFile);
          case 2:
            return @Imagejpeg($ni,$dstFile);
          case 3:
            return @ImagePng($ni,$dstFile);
        }
      }
		}
	}

	return false;
}

/**
 * 文件类
 */
class TFile {
  var $err_msg = "";
  var $report = false;
  //新建目录
  function newdir ($path) {
    $tmp = explode("/",$path);
    if(count($tmp) > 0) {
      for($i=0; $i<count($tmp); $i++) {
        @$path1 .= $tmp[$i]."/";
        if(!file_exists($path1)) {
          if(!mkdir($path1,0777)) {
            $this->err_msg  = "Create directory $path1 fail!";
            $this->error();
          }
          if(!@chmod($path1,0777)) {
            $this->err_msg = "Change directory $path1 attribute fail!";
            $this->error();
          }
        }
      }
    }
    else {
      if(!file_exists($path)) {
        if(!mkdir($path,0777)) {
          $this->err_msg  = "Create directory $path fail!";
          $this->error();
        }
        if(!@chmod($path,0777)) {
          $this->err_msg = "Change directory $path attribute fail!";
          $this->error();
        }
      }
    }
  }
  //新建立文件
  function newfile($filename) {
    $fp = @fopen($filename,"wb");
    @fclose($fp);
    if(!@chmod($filename,0777)) {
      $this->err_msg = "Change directory attribute fail!";
      $this->error();
    }
  }
  //读文件
  function readfile($filename) {
    if(!file_exists($filename)) {
      $this->err_msg = "File $filename not exists!";
      $this->error();
    }
    $html_mod = file_get_contents($filename);
    return $html_mod;
  }
  //写文件末尾
  function appendfile($filename,$append) {
    $fp = @fopen($filename,"a");
    @fputs($fp,$append);
    @fclose($fp);
  }
  //写文件
  function writefile($filename,$content) {
    if(empty($filename))
      return false;
    $this->newdir(substr($filename,0,strrpos($filename,"/")));
    
    $fp = @fopen($filename,"w+b");
    @fwrite($fp,$content);
    @fclose($fp);
    
    if(!@chmod($filename,0777)) {
      $this->err_msg = "Change directory attribute fail!";
      $this->error();
    }
  }
  //检查文件是否存在
  function checkfile($filename) {
    if(!file_exists($filename))
      return false;
    else
      return true;
  }
  //错误
  function error() {
    if($this->err_msg == "") $this->err_msg = "Unknow error!";
    if($this->report) {
      print "<font color=#999999>".$this->err_msg."</font>";
      @mysql_close();
      exit;
    }
  }
}

/**
 * 写文件内容
 */
function writeFileContent($path,$buffer) {
	$fileOpt = new TFile;
	$fileOpt->writefile($path,$buffer);
}

function printLine ($str) {
  echo "$str\n";
}

/**
 * 遍历目录，生成缩略图
 */
function expandDirectory ($spicDir, $dir) {
  if(is_dir($dir)) {
    if ($dh = opendir($dir)) {
      printLine('Expand directory: '.$dir);
      while (($file= readdir($dh)) !== false) {
        if ($file == '.' || $file == '..')
          continue;
        $filename = "$dir/$file";
        if((is_dir($filename)) && $filename != $spicDir) {
          expandDirectory($spicDir, $filename);
        }
        else {
          $spicFilename = "$spicDir/$filename";
          writeFileContent($spicFilename, 'SPIC');
          $ret = makethumb($filename, $spicFilename, 250, 250);
          printLine(' - make thumb '.($ret ? 'success' : 'fail').': '.$spicFilename);
        }
      }
      closedir($dh);
    }
  }
}


expandDirectory('./spic', '.');
printLine('==============================');
printLine('Finish.');