使用ImageMagick，您可以轻松，更快地创建缩略图，比使用PHP的容易得多。

 <?php  // Location to upload main image:  $mainDir = $_SERVER['DOCUMENT_ROOT'].'/images/l/';  // Location to create the thumb image:  $smalDir = $_SERVER['DOCUMENT_ROOT'].'/images/s/';  // Command to use:  $command = '/usr/bin/convert';  // Thumbnail width:  $size = 210;  // Make sure we have an image:  if(isset($_POST['submit'])){      if(getimagesize($_FILES['photo']['tmp_name'])){          $name = $_FILES['photo']['name'];          $uploadfile = $mainDir . $name;          move_uploaded_file($_FILES['photo']['tmp_name'], $uploadfile);          $lrgImg = $mainDir . $name;          $smlImg = $smalDir . $name;          $imageMagick = $command . " '". $lrgImg . "' -resize '$size' '" . $smlImg . "'";                  shell_exec($imageMagick);      }      header("Location: /test.php");      exit;  }else{  ?>      <form action=" <?php echo $_SERVER['PHP_SELF']; ?> " method="post" enctype="multipart/form-data">          <p><input type="file" name="photo" /></p>          <p><input type="submit" value="Upload!" name="submit" /></p>      </form>  <?php      foreach(glob($smalDir.'*') as $img){          echo ' <img src="'.str_replace($_SERVER['DOCUMENT_ROOT'], '',$img).'" /> ';      }  }  ?>