PHP class used to add watermark to images_PHP tutorial

Copy code The code is as follows:

/*
* Function: PHP image watermark (watermark supports pictures or text)
* Parameters:
* $groundImage Background image, that is, watermarking is required Pictures currently only support GIF, JPG, PNG formats;
* $waterPos watermark position, there are 10 states, 0 is a random position;
* 1 is top left, 2 is top center, 3 is top center Right;
* 4 is the middle on the left, 5 is the middle on the middle, 6 is the middle 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, which is a picture used as a watermark, currently only supports GIF, JPG, PNG formats;
* $waterText Text watermark, which uses text as a watermark, supports ASCII code, and 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. Just choose one of them, and use $waterImage first.​ ​
* ​​When $waterImage is valid, the parameters $waterString, $stringFont, and $stringColor are not valid. ​
* ​ 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=”",$waterText=””,$ textFont=5,$textColor=”#FF0000″) 
{ 
$isWaterImage = FALSE; 
$formatMsg = “This file format is not supported yet, please use image processing software to convert the image to GIF, JPG , PNG format.”;                                                $water_info = getimagesize($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($waterImage);break; 
 case 2:$water_im = imagecreatefromjpeg($waterImage) ;break;
case 3:$water_im = imagecreatefrompng($waterImage);break;
default:die($formatMsg);
}
}

//Read background Image IF (! Emptyempty ($ GROUNDIMAGE) && FILE_EXISTS ($ Group)
{
$ Group_Info = GetimageSize ($ GROUNDIMAGE);
$ GROUND_W = $ GROUND_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($groundImage);break;
case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
case 3:$ground_im = imagecreatefrompng($groundImage) ;break;
default:die($formatMsg);
} }
else
die("The picture that needs to be watermarked does not exist! ”);  
}                              $water_h ;
$label = "image";
}
else//Text watermark
{ $temp = imagettfbbox(ceil($textFont*5),0,"./cour .ttf",$waterText);//Get the range of text using TrueType font 
 $w = $temp[2] - $temp[6]; 
$h = $temp[3] - $temp [7];
unset($temp);
$label = "Text area";
}
if( ($ground_w {
echo "The length or width of the image that needs to be watermarked is smaller than the watermark ".$label.", so the watermark cannot be generated!";
return;
switch($waterPos)
{
case 0://random w)) ;
$posY = rand(0,($ground_h - $h));
break;
case 1://1 is top left
$posX = 0;
        $posY = 0;
break;
case 2://2 is top-centered         break;            🎜> case 3://3 is the top on the right
$posX = $ground_w - $w;
$posY = 0;
break;
case 4://4 is on the left
$posX = 0;
$posY = ($ground_h - $h) / 2;
break;
case 5://5 is centered in the middle
$posX = ($ground_w - $ w)/2; > $ posy = ($ GROUND_H-$ h)/2;
Break;
Case 6: // 6 is the middle right
$ POSX = $ Ground_w-$ $ $ w;
$posY = ($ground_h - $h) / 2;
break;
case 7://7 is bottom on the left
$posX = 0;
        $posY = $ground_h - $h;
break;
case 8://8 is bottom centered
$posX = ($ground_w - $w) / 2;
$posY = $ground_h - $ h;
break;
case 9://9 is bottom on the right
$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://random
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h)); ;  
 }

//Set the color blending mode of the image
imagealphablending($ground_im, true);

if($isWaterImage)//Image watermark
{ ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//Copy watermark to target file                                                                                                                                                                         !emptyempty($textColor) && (strlen($textColor)==7) )
{ $R = hexdec(substr($textColor,1,2));
$G = hexdec(substr ($ TextColor, 3,2));
$ B = HexDEC (Substr ($ TextColor, 5)); correct!”);                                              
//Generate the image after watermarking
@unlink($groundImage);
switch($ground_info[2])//Get the format of the background image
{
case 1:imagegif( $ground_im,$groundImage);break; $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
if(isset($_FILES) && !emptyempty($_FILES[ 'userfile']) && $_FILES['userfile']['size']>0)
{
$uploadfile = “./”.time().”_”.$_FILES['userfile '][name][$i];
echo "
";
echo $uploadfile;
if (copy($_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 “”; 🎜> echo “Fail
”;
}
}
}
} method="POST">
for($a=0;$aecho "File:
";                                                                                   /form> 





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Copy the code code as follows: ?php /* *Function: PHP image watermark (watermark supports images or text) *Parameters ： *$groundImage background image, that is, the image that needs to be watermarked, currently only supports GIF, JPG, P...