Code for php GD library to upload images and create thumbnails

Image upload- bbs.it-home.org


File upload (only jpg type images are allowed to be uploaded)

2. Process page upload_img.php

 //Upload image saving address
 $uploadfile = "upfiles/".$_FILES['upfile']['name'];
 //Thumbnail saving Address
 $smallfile = "upfiles/small_".$_FILES['upfile']['name'];

 if($_FILES['upfile']['type'] ! = "image/jpeg")
 {
 echo 'Wrong file type';
 }
 else
 {
 move_uploaded_file($_FILES['upfile']['tmp_name'],$uploadfile); //Upload file
 $dstW=200;//Thumbnail width
 $dstH=200;//Thumbnail height
 $src_image=ImageCreateFromJPEG($uploadfile);
 $srcW =ImageSX($src_image); //Get the image width
 $srcH=ImageSY($src_image); //Get the image height
 $dst_image=ImageCreateTrueColor($dstW,$dstH);
 ImageCopyResized($dst_image,$src_image,0,0,0,0,$dstW,$dstH,$srcW,$srcH);
 ImageJpeg($dst_image,$smallfile);
 echo 'File uploaded successfully';
 echo "";
 }
?>

the above code, It is relatively simple. Friends who are interested can study the gd library function in the PHP manual.