PHP upload image for equal ratio scaling can add watermark function _php Tutorial

Do not say anything, directly on the code, you can add the watermark function on their own:
Copy CodeThe code is as follows:
/**
*
* @author Zhao Jinhan
* @date January 13, 2014 11:54:30
* @email xb_zjh@126.com
*
*/
Header (' content-type:text/html; Charset=utf-8 ');
Define the width height of the thumbnail image
Define (' Thumb_width ', 300);
Define (' Thumb_height ', 300);

/**
* Regenerate the uploaded file name
* @return String
* @author Zhao Jinhan
*
*/
function _file_type ($filetype = null) {
Switch ($filetype)
{
Case "Image/jpeg":
$fileextname = "JPG";
Break
Case "Image/gif":
$fileextname = "gif";
Break
Case "Image/png":
$fileextname = "png";
Break
Default
$fileextname = false;
Break
}
return $fileextname date (' Ymdhis ', Time ()). $fileextname: false;
}

/**
*
* @param string $filename
* @param string $width
* @param string $height
* @param string $quality
* @param string $savepath
* @return Boolean
*/
function _make_thumb ($filename = ", $width =thumb_width, $height =thumb_height, $savepath = './upload ') {
if (file_exists ($filename)) {
Size of the uploaded image
$imagesize =getimagesize ($filename);
$imagewidth = $imagesize [0];
$imageheight = $imagesize [1];
$mime = $imagesize [' MIME '];
Width/height ratio
$ratio = $imagewidth/$imageheight;

Create a new background image
$bgimg = Imagecreatetruecolor ($width, $height);
$white = Imagecolorallocate ($bgimg, 255, 255, 255);
Fill background color to white
Imagefill ($bgimg, 0,0, $white);
if ($mime = = ' Image/gif ') {
$im = @imagecreatefromgif ($filename); /* Attempt to open */
$outfun = ' imagegif ';
}elseif ($mime = = ' Image/png ') {
$im = @imagecreatefrompng ($filename); /* Attempt to open */
$outfun = ' imagepng ';
}else{
$im = @imagecreatefromjpeg ($filename); /* Attempt to open */
$outfun = ' imagejpeg ';
}

if ($ratio > 1) {
Large width
if ($imagewidth > $width) {
Zoom the picture onto the background image
$new _width = $width;
$new _height = ($width * $imageheight)/$imagewidth;
$BG _y = Ceil (ABS (($height-$new _height)/2);
Imagecopyresampled ($bgimg, $im, 0, $bg _y, 0, 0, $new _width, $new _height, $imagewidth, $imageheight);
}else{
Copy picture to background image
$copy = true;
}
}else{
Highly large
if ($imageheight > $height) {
Zoom picture
$new _height = $height;
$new _width = ($height * $imagewidth)/$imageheight;
$BG _x = Ceil (($width-$new _width)/2);
Imagecopyresampled ($bgimg, $im, $bg _x, 0, 0, 0, $new _width, $new _height, $imagewidth, $imageheight);
}else{
Copy picture to background image
$copy = true;
}
}
if ($copy) {
Copy picture to background image
$BG _x = Ceil (($width-$imagewidth)/2);
$BG _y = Ceil (($height-$imageheight)/2);
Imagecopy ($bgimg, $im, $bg _x, $bg _y, 0, 0, $imagewidth, $imageheight);
}
$ext = _file_type ($mime);
$outfun ($bgimg, $savepath. ' /'. $ext);
Imagedestroy ($BGIMG);
return $savepath. ' /'. $ext;
}else{
return false;
}
}

if ($_post) {
$size = $_post[' size ']?strtoupper (Trim ($_post[' size ')): ' 2M ';
$imgsize = $_files[' img ' [' Size ']?$_files[' img '] [' Size ']/(1024*1024): 0;
$imgwidth = $imgheight = $_post[' Width-height ']?intval ($_post[' Width-height ']): 300;
Custom definition File Upload size
Ini_set (' upload_max_filesize ', $size);
$mathsize = Str_replace (' M ', ' ', $size);
if ($imgsize > $mathsize) {
echo "Picture size must not exceed {$size}!";
Return
}
if ($file _name = _file_type ($_files[' img ' [' type '])) {
if ($_files[' img ' [' error '] = = UPLOAD_ERR_OK) {
$savepath = ' upload/';
if (!is_dir ($savepath)) {
mkdir ($savepath, 0644);
}
Generate thumbnail images
$thumb _file = _make_thumb ($_files[' img ' [' tmp_name '], $imgwidth, $imgheight, $savepath);
Move_uploaded_file ($_files[' img '] [' tmp_name '], $savepath. $file _name);
echo "The resulting image is:";
}else{
echo $_files[' img ' [' ERROR '];
Return
}
}else{
echo "image format is not correct, please upload jpg,gif,png format!";
Return
}



}else{
Echo <<



Zoom picture Save to Square





EOT;
}

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