我正在将产品屏幕截图上传到我的网站... 我想上传原始图像，并为其创建缩略图，但在上传两个文件后，所创建的缩略图文件大小比预期稍大。 有没有办法在php或使用Imagemagick（我不知道如何使用，但如果需要的话我愿意学习）的情况下减少缩略图的文件大小而又不会过分影响质量...以下是我用于上传文件的代码..
<form action="<?php echo $_server['php-self']; ?>" method="post" enctype="multipart/form-data" id="something" class="uniForm">
<input name="new_image" id="new_image" size="30" type="file" class="fileUpload" />
<button name="submit" type="submit" class="submitButton">Upload/Resize Image</button>
<?php
if(isset($_POST['submit'])){
if (isset ($_FILES['new_image'])){
$imagename = $_FILES['new_image']['name'];
$source = $_FILES['new_image']['tmp_name'];
$target = "images/".$imagename;
move_uploaded_file($source, $target);
$imagepath = $imagename;
$save = "images/" . $imagepath; //This is the new file you saving
$file = "images/" . $imagepath; //This is the original file
list($width, $height) = getimagesize($file) ;
$tn = imagecreatetruecolor($width, $height) ;
$image = imagecreatefromjpeg($file) ;
imagecopyresampled($tn, $image, 0, 0, 0, 0, $width, $height, $width, $height) ;
imagejpeg($tn, $save, 100) ;
$save = "images/sml_" . $imagepath; //This is the new file you saving
$file = "images/" . $imagepath; //This is the original file
list($width, $height) = getimagesize($file) ;
$modwidth = 130;
$diff = $width / $modwidth;
$modheight = 185;
$tn = imagecreatetruecolor($modwidth, $modheight) ;
$image = imagecreatefromjpeg($file) ;
imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;
imagejpeg($tn, $save, 100) ;
echo "Large image: <img src='images/".$imagepath."'><br>";
echo "Thumbnail: <img src='images/sml_".$imagepath."'>";
}
} ?>
请指引我正确的方向...谢谢