Nonsense not to say, paste code:
Copy CodeThe code is as follows:
/************************************
Function: Watermark ($bigimg, $smallimg, $coord = 1)
Role: Adding watermarks
Parameters:
$bigimg must be selected. Big picture--a picture to add a watermark
$smallimg must be selected. Small picture
$coord is optional. The position of the watermark in the larger image,
1 upper left corner, 2 right upper corner, 3 right lower corner, 4 lower left corner, 5 middle
Example: Watermark (' datu.png ', ' Xiaotu.png ', 3); Watermark the datu.png in the lower right corner
*************************************/
function watermark ($bigimg, $smallimg, $coord = 1) {
Load two images and turn it into a PHP encoded format for identification,
is equivalent to the Imagecreate function, except that it is not an empty image created here.
$bi = getimagesize ($bigimg);
Switch ($bi [2]) {
Case 1:
$im 1 = imagecreatefromgif ($bigimg);
Case 2;
$im 1 = imagecreatefromjpeg ($bigimg);
Case 3;
$im 1 = imagecreatefrompng ($bigimg);
}
$si = getimagesize ($smallimg);
Switch ($si [2]) {
Case 1:
$im 2 = imagecreatefromgif ($smallimg);
Case 2;
$im 2 = imagecreatefromjpeg ($smallimg);
Case 3;
$im 2 = imagecreatefrompng ($smallimg);
}
Create a watermark-principle: Copy the small image onto the larger image. Note the calculation of the coordinate values here
Switch ($coord) {
Case 1:
Imagecopy ($im 1, $im 2, 0, 0, 0, 0, $si [0], $si [1]); Break
Case 2:
Imagecopy ($im 1, $im 2, $bi [0]-$si [0], 0, 0, 0, $si [0], $si [1]); Break
Case 3:
Imagecopy ($im 1, $im 2, $bi [0]-$si [0], $bi [1]-$si [1], 0, 0, $si [0], $si [1]); Break
Case 4:
Imagecopy ($im 1, $im 2, 0, $bi [1]-$si [1], 0, 0, $si [0], $si [1]); Break
Case 5:
Imagecopy ($im 1, $im 2, ($bi [0]-$si [0])/2, ($bi [1]-$si [1])/2, 0, 0, $si [0], $si [1]); Break
}
Generate picture files in different formats based on suffix name
Switch ($bi [2]) {
Case 1:
Imagegif ($im 1); break;
Case 2;
Imagejpeg ($im 1); break;
Case 3;
Imagepng ($im 1); break;
}
Imagedestroy ($im 1);
}
/************************************************
function: Thumbnail ($srcimg, $multiple)
Function: Generate a thumbnail image
Parameters:
$srcimg must be selected. Source Picture file name
$multiple is optional. The default is twice times, which is reduced to the original 1/2
Note: Only gif, JPG, PNG format pictures are supported.
Example: Thumbnail (' My pictures. jpg ', 5);
*************************************************/
function thumbnail ($srcimg, $multiple = 2) {
Load a picture and save its information to an array
$srcimg _arr = getimagesize ($srcimg);
Calculating the thumbnail multiples
$thumb _width = $srcimg _arr[0]/$multiple;
$thumb _height = $srcimg _arr[1]/$multiple;
Judging: What format to create the image (converted to PHP identification code)
Switch ($srcimg _arr[2]) {
Case 1:
$im = Imagecreatefromgif ($srcimg);
Case 2;
$im = Imagecreatefromjpeg ($srcimg);
Case 3;
$im = Imagecreatefrompng ($srcimg);
}
Start thumbnail operation
$thumb = Imagecreatetruecolor ($thumb _width, $thumb _height);
Imagecopyresized ($thumb, $im, 0, 0, 0, 0, $thumb _width, $thumb _height, $srcimg _arr[0], $srcimg _arr[1]);
Switch ($srcimg _arr[2]) {
Case 1:
Imagegif ($THUMB); Break
Case 2;
Imagejpeg ($THUMB); Break
Case 3;
Imagepng ($THUMB); Break
}
Imagepng ($THUMB);
Imagedestroy ($THUMB);
}
Do not use both functions at the same time for testing.
Watermark (' datu.png ', ' xiaotu.png ', 5);
Thumbnail (' Abc.png ', 3);
?>
http://www.bkjia.com/PHPjc/322620.html www.bkjia.com true http://www.bkjia.com/PHPjc/322620.html techarticle nonsense, paste code: Copy the Code as follows:? PHP/************************************//function: Watermark ($bigimg, $smallimg, $coord = 1)//function : Add Watermark/...
