Problem uploading JPG images in IE_PHP tutorial

I made a small program for uploading pictures some time ago, but today someone said that jpg pictures cannot be uploaded. I tested it in local Chrome and Firefox and found that there was no problem and the upload was normal. I asked him what browser he was using, and it turned out to be Window of the World, and 360... I was embarrassed. I wonder if it's a problem with IE? So I tested it under IE, and sure enough it didn't work. The original procedure is as follows:

	switch($type)
	{
		case "image/jpeg":
		$resultImage = imagecreatefromjpeg($original);
		imagejpeg($resultImage, $target, $quality); 
		break;
		
		case "image/png":
		$resultImage = imagecreatefrompng($original);
		imagepng($resultImage, $target, $quality_png);
		break;
		
		case "image/gif":
		$resultImage = imagecreatefromgif($original);
		imagegif($resultImage, $target, $quality);
		break;
		
		default :
		die("不支持此文件类型");
        exit;
	}

Later, I googled and found that there are indeed some differences in jpg format images under IE.

Upload a jpg image under IE, and then print the information of the uploaded file as follows:

Array
(
	[name] => bkjia.jpg
	[type] => image/pjpeg
	[tmp_name] => /tmp/phprY0loE
	[error] => 0
	[size] => 71189
)

The Mimetype of images in jpg format is image/pjpeg. Since Chrome or Firefox is used during development, image/pjpeg is not added during judgment, so images in jpg format cannot be recognized by IE-based browsers.

The following is a comparison of the formats of images in different browsers:

firefox image/jpeg image/bmp image/gif image/png
ie 6 image/pjpeg image/bmp image/gif image/x-png
ie 7 image/pjpeg image/bmp image/gif image/x-png
ie 8 image/pjpeg image/bmp image/gif image/x-png

When uploading pictures, IE will translate jpg and jpeg into image/pjpeg, and png into image/x-png. Firefox is very standard: jpg and jpeg are translated into image/jpeg, and png is translated into image/png.

It will be OK if the program is changed to this.

	switch($type)
	{
		case "image/jpeg":
		$resultImage = imagecreatefromjpeg($original);
		imagejpeg($resultImage, $target, $quality); 
		break;
		
		case "image/pjpeg":
		$resultImage = imagecreatefromjpeg($original);
		imagejpeg($resultImage, $target, $quality); 
		break;
		
		case "image/png":
		$resultImage = imagecreatefrompng($original);
		imagepng($resultImage, $target, $quality_png);
		break;
		
		case "image/gif":
		$resultImage = imagecreatefromgif($original);
		imagegif($resultImage, $target, $quality);
		break;
		
		default :
		die("不支持此文件类型");
        exit;
	}

http://www.bkjia.com/PHPjc/752535.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/752535.htmlTechArticleI made a small program for image uploading some time ago, but today someone said that jpg images cannot be uploaded. I tested it in local Chrome and Firefox and found that there was no problem and the upload was normal. I asked him what...