PHP generates thumbnail sample code sharing (implemented using gd library)_PHP tutorial

Copy code The code is as follows:

header("content-type:text/html;charset=gbk");
ini_set("date.timezone","Asia/chong");
//Determine whether the file is empty
if(empty($_FILES)){
echo "The uploaded file is too large";
exit;
}
//Determine file upload Is there an error?
if($_FILES['pic']['error']){
echo "Upload file";
exit;
}
//Determine whether the file type is illegal Get file suffix
$allowtype=array("jpg","png","jpeg","gif");
$a=explode('.',$_FILES['pic']['name ']);
$index=count($a)-1;
$ex=strtolower($a[$index]);
if(!in_array($ex,$allowtype)){
echo "Illegal file upload";
exit;
}
$file=date('YmdHis').rand().".".$ex;
$src=$ _FILES['pic']['tmp_name'];
$des="upload/".$file;
$rs=move_uploaded_file($src,$des);

//Condensation Thumbnail image
//Read uploaded images
$image=imagecreatefromjpeg($des);
$a=getimagesize($des);
$w=$a[0];
$h=$a[1];
if($w>$h){
$width=300;
$height=$width/$w*$h;
}else if ($w<$h){
$height=300;
$width=$height/$h*$w;
}else{
$width=300;
$height =300;
} www.jbxue.com
//Create a blank new image
$newimage=imagecreatetruecolor($width, $height);
//Copy source image content copy new image
imagecopyresized($newimage, $image, 0,0, 0,0, $width, $height, $w, $h);
$filename="upload/s_".$file;
imagejpeg( $newimage,$filename);

http://www.bkjia.com/PHPjc/718620.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/718620.htmlTechArticleCopy the code as follows: form method="post" action="suo_do.php" enctype="multipart/form -data" input type="file" name="pic" / input type="submit" value="Upload 1" / /form ?php head...