Find the Watermark code on the Internet:
/*
* Function: PHP image watermark (watermark supports picture or text)
Parameters
* $product _img background image, that is, need to add a watermark image, temporarily only support gif,jpg,png format;
* $waterPos watermark position, there are 10 kinds of states, 0 is a random position;
* 1 for the top left, 2 for the top center, 3 for the top right;
* 4 for the middle of the left, 5 for the Middle center, 6 for the middle right;
* 7 for the bottom of the left, 8 for the bottom center, 9 for the bottom of the right;
* $waterImage image watermark, that is, as a watermark image, temporarily only support gif,jpg,png format;
* $waterText text watermark, that is, the text as a watermark, support ASCII code, does not support Chinese;
* $textFont Text size, value 1, 2, 3, 4 or 5, default is 5;
* $textColor text color, value is hexadecimal color value, default is #ff0000 (red);
*
* Note: Support GD 2.0,support FreeType, gif Read, GIF Create, JPG, PNG
* $waterImage and $waterText best not to use at the same time, choose one of them, priority to use the $waterImage.
* When the $waterimage is valid, the parameters $waterstring, $stringFont, $stringColor are not effective.
* The watermark image has the same file name as the $product _img.
* Author: longware @ 2004-11-3 14:15:13
*/
function Imagewatermark ($product _img, $waterPos =0, $waterImage = "", $waterText = "", $textFont =5, $textColor = "#FF0000")
{
$isWaterImage = FALSE;
$FORMATMSG = "Does not support this file format, please use the picture processing software to convert the picture to GIF, JPG, PNG format. ";
Read Watermark File
if (!empty ($waterImage) && file_exists ($waterImage))
{
$isWaterImage = TRUE;
$water _info = getimagesize ($waterImage);
$water _w = $water _info[0];//To obtain the width of the watermark picture
$water _h = $water _info[1];//To obtain a high watermark image
Switch ($water _info[2])//Get the format of the watermark picture
{
Case 1water_im = imagecreatefromgif ($waterImage);
Case 2water_im = Imagecreatefromjpeg ($waterImage);
Case 3water_im = imagecreatefrompng ($waterImage);
Default:die ($FORMATMSG);
}
}
Read background picture
if (!empty ($product _img) && file_exists ($product _img))
{
$ground _info = getimagesize ($product _img);
$ground _w = $ground _info[0];//Get the width of the background image
$ground _h = $ground _info[1];//get a high background picture
Switch ($ground _info[2])//Get the format of the background picture
{
Case 1: $ground _im = imagecreatefromgif ($product _img);
Case 2: $ground _im = imagecreatefromjpeg ($product _img);
Case 3: $ground _im = imagecreatefrompng ($product _img);
Default:die ($FORMATMSG);
}
}
Else
{
Die ("The picture that needs watermark does not exist!") ");
}
Watermark Location
if ($isWaterImage)//Picture watermark
{
$w = $water _w;
$h = $water _h;
$label = "Picture";
}
else//text watermark
{
$temp = Imagettfbbox (ceil ($textFont *2.5), 0, "Arial.ttf", $waterText);//Get text using TrueType fonts The scope of this
$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 picture that needs to be watermarked is more than a watermark". $label. " Still small, unable to generate watermark! ";
Return
}
Switch ($waterPos)
{
Case 0://Random
$posX = rand (0, ($ground _w-$w));
$posY = rand (0, ($ground _h-$h));
Break
Case 1://1 for top left
$posX = 0;
$posY = 0;
Break
Case 2://2 centered on the top
$posX = ($ground _w-$w)/2;
$posY = 0;
Break
Case 3://3 for top right
$posX = $ground _w-$w;
$posY = 0;
Break
Case 4://4 for the middle left
$posX = 0;
$posY = ($ground _h-$h)/2;
Break
Case 5://5 centered in the middle
$posX = ($ground _w-$w)/2;
$posY = ($ground _h-$h)/2;
Break
Case 6://6 for the middle right
$posX = $ground _w-$w;
$posY = ($ground _h-$h)/2;
Break
Case 7://7 for Bottom left
$posX = 0;
$posY = $ground _h-$h;
Break
Case 8://8 centered at bottom
$posX = ($ground _w-$w)/2;
$posY = $ground _h-$h;
Break
Case 9://9 for bottom right
$posX = $ground _w-$w;
$posY = $ground _h-$h;
Break
default://Random
$posX = rand (0, ($ground _w-$w));
$posY = rand (0, ($ground _h-$h));
Break
}
To set the color blending mode of an image
Imagealphablending ($ground _im, true);
if ($isWaterImage)//Picture watermark
{
Imagecopy ($ground _im, $water _im, $posX, $posY, 0, 0, $water _w, $water _h);//copy watermark to target file
}
else//text watermark
{
if (!empty ($textColor) && (strlen ($textColor) ==7))
{
$R = Hexdec (substr ($textColor,));
$G = Hexdec (substr ($textColor, 3,2));
$B = Hexdec (substr ($textColor, 5));
}
Else
{
Die ("Watermark text color format is not correct! ");
}
Imagestring ($ground _im, $textFont, $posX, $posY, $waterText, Imagecolorallocate ($ground _im,
$R, $G, $B));
}
Create a picture after a watermark
@unlink ($product _img);
Switch ($ground _info[2])//Get the format of the background picture
{
Case 1:imagegif ($ground _im, $product _img);
Case 2:imagejpeg ($ground _im, $product _img);
Case 3:imagepng ($ground _im, $product _img);
Default:die ($ERRORMSG);
}
Freeing memory
if (Isset ($water _info)) unset ($water _info);
if (Isset ($water _im)) Imagedestroy ($water _im);
unset ($ground _info);
Imagedestroy ($ground _im);
} //---------------------------------------------------------------------------------------
if (Isset ($_files) &&!empty ($_files[' userfile ']) && $_files[' userfile ' [' Size ']>0]
{
$uploadfile = "./". Time (). " _ ". $_files[' userfile ' [' name '];
if (copy ($_files[' userfile ' [' tmp_name '], $uploadfile))
{
echo "OK
";
Text watermark
Imagewatermark ($uploadfile, 0, "", http://www.bkjia.com,5, "#FF0000");
Image watermark
$waterImage = "images/bz.gif";//Watermark Picture Path
Imagewatermark ($uploadfile, 0, $waterImage);
echo "";
}
Else
{
echo "Fail
";
}
} |
