Add watermark to php image upload (automatically add watermark)_PHP tutorial

PHP image upload and watermark (automatically add watermark)/*This is a perfect PHP file upload code. After the image is uploaded successfully, it will automatically add a watermark to the image. This is very good and fast. You have to add it one by one manually. watermark effect.

php tutorial picture upload and watermark (automatically add watermark)
/*
This is a perfect php file upload code. After the picture is uploaded successfully, it will automatically add a watermark to the picture, which is very fast and fast. To improve, you have to manually add the watermark effect one by one.
*/

function upload($uploadfile,$watermark=1,$watertype=1,$content){
foreach($uploadfile['name'] as $key=>$name) { // Multi-file upload function
uploadall($uploadfile,$key,$watermark,$watertype,$content);
}
}
function uploadall($uploadfile,$i,$watermark,$watertype ,$content) {
$watermark=$watermark; //Whether to attach a watermark (1 is watermark, others are not watermarked);
$watertype=$watertype; //Watermark type (1 is text, 2 is the picture)
$watercontent=$content; //The content of the watermark
if(empty($uploadfile['name'][$i])) {
die("No file uploaded" );
}
if($uploadfile['error'][$i] == 2) { //Verify the html judgment result
die("The uploaded file is too large");
}
$allow_filemaxsize = 2048000; // 2m
$filesize = $uploadfile['size'][$i];
if($filesize > $allow_filemaxsize) {
die(" The uploaded file is too large");
}
$allow_filetypes = array("jpeg", "gif", "png","jpg","pjpeg");//Unified resources for files allowed to be uploaded Type mimetype
$allow = false; $t) {
if(strpos($mimetype, $t) !== false) {
$allow = true; //File type that meets the upload conditions was found
break;
}
}
if($allow == false) {
die("The uploaded file type is not allowed");
}
$result = is_uploaded_file($uploadfile['tmp_name' ][$i]); //Determine whether it is generated by the upload action
if(!$result) {
die("The uploaded file is incorrect");
}
$uploaddir = "img/"; //Upload file saving directory
if(!file_exists($uploaddir)) mkdir($uploaddir, 0777, true);//If the upload saving directory does not exist, create it recursively
/* *Rename file**/
$filetype = explode(".", $uploadfile['name'][$i]);
$filetype = array_pop($filetype);
$uploadfilename = time ().".".$filetype;
$_session['filename'] = $uploadfilename;
//end
$result = move_uploaded_file($uploadfile['tmp_name'][$i], $uploaddir.$uploadfilename);
if($result) {
echo "File uploaded successfully";
}else{
switch($uploadfile['error'][$i]) {
case 1:return "The uploaded file exceeds the maximum value set in php.ini";break;
case 2:return "The uploaded file exceeds the maximum value set in html";break;
case 3:return "Only part of the file was uploaded";break;
case 4;return "No file was uploaded";break;
default:die("File upload failed");
}
}
if($watermark==1) {
$iinfo=getimagesize($uploaddir.$uploadfilename); //Get the relevant information of the image and get the array
$nimage=imagecreatetruecolor( $iinfo[0],$iinfo[1]);
$white=imagecolorallocate($nimage,255,255,255); //Set the background color to white
$black=imagecolorallocate($nimage,0,0,0 ); //Set the background color to black
$red=imagecolorallocate($nimage,255,0,0); //Set the background color to red
imagefill($nimage,0,0,$white); //The background is filled with white
switch ($iinfo[2]) {
case 1:
$simage =imagecreatefromgif($uploaddir.$uploadfilename);
break;
case 2:
$simage =imagecreatefromjpeg($uploaddir.$uploadfilename);
break;
case 3:
$simage =imagecreatefrompng($uploaddir.$uploadfilename);
break;
case 6:
$simage =imagecreatefromwbmp($uploaddir.$uploadfilename);
break;
default:
die("Unsupported file type");
exit;
}
imagecopy($nimage,$simage,0,0,0,0,$iinfo['0'],$iinfo['1']);
switch($watertype) {
case 1: // Watermark string
imagestring($nimage,5,$iinfo['0']/2-50,$iinfo['1']-30,$watercontent,$black ; $simage1,$iinfo['0']/2+50,$iinfo['1']-100,0,0,$size[0],$size[1]);
imagedestroy($simage1) ;
break;
}

switch ($iinfo[2]) {
case 1:
imagejpeg($nimage, $uploaddir.$uploadfilename); //Change the image $nimage creates a jpeg format file with the $destination file name
break;

case 2:

imagejpeg($nimage, $uploaddir.$uploadfilename);
break;
case 3:
imagepng($nimage, $uploaddir.$uploadfilename);
break;
case 6:
imagewbmp($nimage, $uploaddir.$uploadfilename);
break;
}
imagedestroy($nimage); //Overwrite the original uploaded file
imagedestroy($simage);
}
}
if(@$_get['act'] == "insert" ) { //No parameter verification is done
//The four parameters of this function are: the name value of the upload control; whether to add a watermark (1 is plus, other numbers are bad);
//Watermark Type (1 is a string, 2 is a picture); the content of the watermark, write the data when it is a string, and write the address of the picture when it is a picture;
$picture = upload($_files['picture'],1,2, "img/watermark.gif");//Upload the file and return the uploaded file path name

}

?>

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TechArticlephp image upload with watermark (automatically add watermark)/*This is a perfect php file upload code, picture After the upload is successful, a watermark will be automatically added to the image, which will improve the quality quickly...