Copy the code The code is as follows:

/*
* Function: PHP image watermark (watermark supports pictures or text)
* Parameters:
* $groundImage Background image, that is, the image that needs to be watermarked, currently only supports GIF, JPG, PNG formats ;
* $waterPos Watermark position, there are 10 states, 0 is a random position;
* 1 means the top is on the left, 2 means the top is in the middle, 3 is the top is on the right;
* 4 is the middle on the left, 5 is the middle in the middle for The middle is on the right;
* 7 is the bottom on the left, 8 is the bottom on the center, 9 is the bottom on the right;
* $waterImage Image watermark, that is, the image used as a watermark, currently only supports GIF, JPG, and PNG formats;
* $waterText Text watermark, that is, text is treated as a watermark, supports ASCII code, does not support Chinese;
* $textFont Text size, the value is 1, 2, 3, 4 or 5, the default is 5;
* $textColor Text color, The value is a hexadecimal color value, the default is #FF0000 (red);
*
* Note: Support GD 2.0, Support FreeType, GIF Read, GIF Create, JPG, PNG
* It is best not to use $waterImage and $waterText at the same time To use, just choose one of them, $waterImage is used first.?
* ? When $waterImage is valid, the parameters $waterString, $stringFont, and $stringColor will not take effect.?
* ? The file name of the watermarked image is the same as $groundImage.
* Author: longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($groundImage,$waterPos=0,$waterImage=”",$waterText=””,$textF
{
$isWaterImage = FALSE;
$formatMsg = "This file format is not supported yet. Please use image processing software to convert the image to GIF, JPG, or PNG format.”;
//Read watermark file
if(!emptyempty($waterImage) && file_exists($waterImage))
{
$isWaterImage = TRUE;
$water_info = getimagesize( $waterImage);
$water_w = $water_info[ 0];//Get the width of the watermark image
$water_h = $water_info[1];//Get the height of the watermark image
switch($water_info[2])//Get the format of the watermark image
{
case 1:$ water_im = imagecreatefromgif($waterImage);break; ??default:die($formatMsg); ??
}}} 讀 // Read the background picture
IF (! Emptyempty ($ GROUNDIMAGE) && File_exists ($ GROUNDIMAGE)) {
$ GROUND_INFO = GetImageSize ($ GROUNDIMAGE); N $ GROUND_W = $ Group_info [0]; // Get the width of the background image
$ground_h = $ground_info[1];//Get the height of the background image
switch($ground_info[2])//Get the format of the background image
case 1:$ground_im = imagecreatefromgif( $ groundImage);break; ?????????????????????????????????????????????????????????????? ?g);
}
}
else
{
die("The picture that needs to be watermarked does not exist! ”);
}
//Watermark position
if($isWaterImage)//Picture watermark
{
$w = $water_w;
$h = $water_h;
????????????????????????????????????????????????????????????????????????$label?????????????????/Text watermark
{
$temp = imagettfbbox(ceil($textFont*5),0,"./cour.ttf",$waterText);//Get the range of text using TrueType fonts
$w = $temp[ 2] - $temp[6];
$h = $temp[3] - $temp[7];
unset($temp);
$label = "text area";
}
if( ($ground_w< $w) || ($ground_h<$h) )
{
echo “The length or width of the image to be watermarked is smaller than the watermark “.$label.”, so the watermark cannot be generated!”;
} return;
switch($waterPos)
{
case 0://random
$posX = rand(0,($ground_w - $w));
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?- $h));
??????? break;
case 2://2 is top-centered
$posX = ($ ground_w - $w) / 2;
$posY = 0;
break;
case 3://3 is top right
$posX = $ground_w - $w;
$posY = 0;
break;
case 4 ://4 means the center is on the left ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? $posX?????????????????????????????????????????????????????????????????$posX = ($ground_w - $w ) / 2;
$posY = ($ground_h - $h) / 2;
????????? break;
??????? $posY = ($ground_h - $h) / 2;
???????????????????????????????????????????????????????????????????????????? ?break;
case 8://8 is the bottom center
???????? $posX??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? $posX???????????????????????????????????????????????????????????????????????????????$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://random
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ ground_h - $h) );
break;
}
//Set the color blending mode of the image
imagealphablending($ground_im, true);
if($isWaterImage)//Image watermark
{

imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $ water_w,$water_h);//Copy the watermark to the target file
}
else//Text watermark
{ if(!emptyempty($textColor) && (strlen($textColor)==7))
{????????????????????????????????????????????????????????????????????????????????????????????????hexdec(substr($textColor,1,2));
} $G = hexdec(substr($textColor,3,2));
$B = hexdec(substr($textColor,5));
}
else
{(DIE ("Watermark text color format is incorrect!”);
}
imagestring ($ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B)); After pictures
@unlink($groundImage);
switch($ground_info[2])//Get the format of the background image
{ case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$ groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:die($errorMsg);
}
//Release memory
if(isset($water_info)) unset($water _info) ;
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im); ——————————————
$id=$_REQUEST['id'];
$num = count($_FILES['userfile']['name']);
print_r($ _FILES['userfile']);
print_r($_FILES['userfile']['name']);
echo $num;
echo "
";
if(isset($id)){
for($i=0;$i<$id;$i++){
if(isset($_FILES) && !emptyempty($_FILES['userfile']) && $_FILES['userfile']['size'] > uploadfile;
if (copy($_FILES['userfile']['tmp_name'][$i], $uploadfile))
{ echo “OK
”;
//Text watermark
// imageWaterMark($ uploadfile,5,"","HTTP://www.lvye.info",5,"#cccccc");
//Image watermark $waterImage="logo_ok1.gif";//Watermark image path
imageWaterMark( $uploadfile,9,$waterImage);
echo “”;
else
{
echo “Fail }
}
}}
? & Gt;
& lt; form entype = "Multipart/form-data" method = "post" & gt;
& lt;? Php
For ($ a = 0; $ ID; $ id; $ id; $a++){
echo “File:
”;
}
?>




The above introduces the watermarking PHP class used to add watermarks to pictures, including watermarking. I hope it will be helpful to friends who are interested in PHP tutorials.