PHP support to generate thumbnail file upload Code _php tutorial

PHP tutorial support to generate thumbnail file upload code
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<title>Untitled Document</title>

Class Upfileclass {

var $upfile, $upfile _name, $upfile _size;
# $upfile temporary filename $_files[' tmp_name '), $upfile _name filename $_files[' name '], $upfile _size file size $_files[' size '];

var $new _upfile_name; # The file name after uploading;
var $fleth, $fileextent; # file extension (type);
var $f 1, $f 2, $f 3; # File save path (multilevel) upfiles/2008-01/08/;
var $filename; # file (with path);
var $filepath; #相对路径用来删除文件;
var $maxsize, $file _type; # Allow upload file size allows uploading of file types;

var $buildfile, $newfile, $file _width, $file _height, $rate;

function Upfileclass ($upfile, $upfile _name, $upfile _size) {
$this->upfile = $upfile;
$this->upfile_name = $upfile _name;
$this->upfile_size = $upfile _size;
$this->new_upfile_name = $this->createnewfilename ($this->upfile_name);
$this->f1 = "Upfiles";
$this->f2 = $this->f1. " /". Date (' Y ')." -". Date (' m ');
$this->f3 = $this->f2. " /". Date (' d ');
$this->filename = $this->f3. "/" . $this->new_upfile_name;
$this->maxsize = 500*1024; # File Size 500kb
$this->file_type = "Gif/jpg/jpeg/png/bmp"; # allowed file types to upload
}

# Create new file name (original filename)
function Createnewfilename ($file _name) {
$this->fleth = Explode (".", $file _name);
$this->fileextent = $this->fleth[(int) count ($this->fleth)-1]; # get file suffix;
$tmps Tutorial tr = date (' Ymd '). Rand (0,time ()). ".". $this->fileextent; # Create a new file name;
return $tmpstr;
}

# Detect file type is correct
function Chk_fileextent () {
$iwtrue = 0;
$fle = Explode ("/", $this->file_type);
for ($i =0; $i < count ($fle); $i + +) {
if ($this->fileextent = = $fle [$i]) {
$iwtrue = (int) $iwtrue + 1;
}
}
if ($iwtrue = = 0) {
$this->msg ("file does not match". $this->file_type. "Format!");
}
}

# Prompt error message and terminate operation
function msg ($error) {
echo "n";
Die ();
}

# Save File
function SaveFile () {
$this->chk_fileextent ();
$this->chk_filesize ();
$this->createfolder (". /". $this->f1);
$this->createfolder (". /". $this->f2);
$this->createfolder (". /". $this->f3);
return $this->chk_savefile ();
}

# Check if upload results are successful
function Chk_savefile () {
$copymsg = Copy ($this->upfile, ".. /". $this->filename);
if ($copymsg) {
return $this->filename;
}
else{
$this->msg ("File upload failed! nn please re-upload! ");
}
}

# Create a folder
function CreateFolder ($foldername) {
if (!is_dir ($foldername)) {
mkdir ($foldername, 0777);
}
}

# Detect File Size
function Chk_filesize () {
if ($this->upfile_size > $this->maxsize) {
$this->msg ("Destination file cannot be greater than". $this->maxsize/1024. "KB");
}
}

# Delete Files ($filepath file relative path)
function DeleteFile ($filepath) {
if (!is_file ($filepath)) {
return false;
}
else{
$ending = @unlink ($filepath);
return $ending;
}
}

/*
Functions: Generating thumbnails
Makebuild ("/www.bkjia.c0m/a.jpg", "news/b.jpg", "100");
Parameters:
Echo $buildfile; Original with Path
Echo $newfile; Generated thumbnail with path
echo $file _width; Thumbnail width value
echo $file _height; Thumbnail height value (default is the width of the scale value)
Echo $rate; thumbnail image quality;
*/
function Makebuild ($buildfile, $newfile, $file _width, $file _height=0, $rate =100) {
if (!is_file ($buildfile)) {
$this->msg ("file". $buildfile. "is not a valid graphics file! The NN system cannot generate thumbnails for this file! ");
return false;
}
$data = getimagesize ($buildfile);
Switch ($data [2]) {
Case 1:
$im = @imagecreatefromgif ($buildfile);
Break
Case 2:
$im = @imagecreatefromjpeg ($buildfile);
Break
Case 3:
$im = @imagecreatefrompng ($buildfile);
Break
}
if (! $im) {
return false;
}
else{
$SRCW = Imagesx ($im); # get the original width;
$srch = Imagesy ($im); # get the original height;
$DSTX = 0;
$dsty = 0;

if ($file _height==0) {
$file _height = $file _width/$SRCW * $srch;
}

if ($SRCW * $file _height> $srch * $file _width) {
$ffile _height = Round ($srch * $file _width/$SRCW);
$dsty = Floor (($file _height-$ffile _height)/2);
$ffile _width = $file _width;
}
else {
$ffile _width = Round ($SRCW * $file _height/$srch);
$DSTX = Floor (($file _width-$ffile _width)/2);
$ffile _height = $file _height;
}
$ni = Imagecreatetruecolor ($file _width, $file _height);
$dstx = ($dstx <0)? 0: $dstx;
$dsty = ($dstx <0)? 0: $dsty;
$DSTX = ($dstx > ($file _width/2)) floor ($file _WIDTH/2): $DSTX;
$dsty = ($dsty > ($file _height/2)) floor ($file _height/s): $dsty;
Imagecopyresized ($ni, $im, $dstx, $dsty, 0,0, $ffile _width, $ffile _height, $SRCW, $srch);

Imagejpeg ($ni, $newfile, $rate); # Generate thumbnails;
Imagedestroy ($im); # Imagedestroy (Resource) releases the memory associated with the image
}
}

}
?>

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