Simple file upload to local file for PHP development (2)

and provided some restrictions on uploading files.

In this section we use PHP code to perform if judgments on various conditions

First we must determine the value passing method:

Judge whether the image exists in the directory:

$_FILES["upfile"]["tmp_name"] is the original path name of the image.

Determine the size of the uploaded file:

$_FILES["upfile"]["size"] is the size of the uploaded file, expressed here in bytes.

Determine whether there are files with the same name in the same directory:

Here we add a section to determine whether to add a watermark for everyone’s benefit Study reference.

Complete example code:

       
   上传文件:  
 允许上传的文件类型为:  已经成功上传
文件名: ".$destination_folder.$fname."
"; echo " 宽度:".$image_size[0]; echo " 长度:".$image_size[1]; echo "
 大小:".$file["size"]." bytes"; if($watermark==1) //是否添加水印 { $iinfo=getimagesize($destination,$iinfo); $nimage=imagecreatetruecolor($image_size[0],$image_size[1]); $white=imagecolorallocate($nimage,255,255,255); $black=imagecolorallocate($nimage,0,0,0); $red=imagecolorallocate($nimage,255,0,0); imagefill($nimage,0,0,$white); switch ($iinfo[2]) { case 1: $simage =imagecreatefromgif($destination); break; case 2: $simage =imagecreatefromjpeg($destination); break; case 3: $simage =imagecreatefrompng($destination); break; case 6: $simage =imagecreatefromwbmp($destination); break; default: die("不支持的文件类型"); exit; } imagecopy($nimage,$simage,0,0,0,0,$image_size[0],$image_size[1]); imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$white); switch($watertype) { case 1: //加水印字符串 imagestring($nimage,2,3,$image_size[1]-15,$waterstring,$black); break; case 2: //加水印图片 $simage1 =imagecreatefromgif("xplore.gif"); imagecopy($nimage,$simage1,0,0,0,0,85,15); imagedestroy($simage1); break; } switch ($iinfo[2]) { case 1: //imagegif($nimage, $destination); imagejpeg($nimage, $destination); break; case 2: imagejpeg($nimage, $destination); break; case 3: imagepng($nimage, $destination); break; case 6: imagewbmp($nimage, $destination); //imagejpeg($nimage, $destination); break; } //覆盖原上传文件 imagedestroy($nimage); imagedestroy($simage); } if($imgpreview==1) //是否预览图片 { echo "
图片预览:
"; echo ""; } } ?>