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PHP ??? ???? ??

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???? ??? ? ? ?? ??? ?????.

1. ?? ???(?? ?? ?????? ?)? ???.

2. ???? ??? ?? (???? ?? ?????? ?)

3. imagecopymerge? ???? ?? ???? ? ???? ??? ??? ??

4. ??? ??

.5 ??? ??

1. ?? ??? ????

????? ??? ?? ???(d:/? ???? ??? ??) www/img/meinv.jpg ? ???), ??? ??? ????.

99.png

???? ? ?? ??(d:/? ???? ??? ??) www/img/logo.png ? ???) ??? ??? ????.

document_2015-09-22_56010df4559d3.png

?? ??? ?? ? ??? ???? ????.

bool imagecopymerge (resource $ target image, resources $ source image, int $ target start x, int $target start y, int $source x, int $source y, int $source width, int $source height, int $transparency )

??:
??? ?? 0~100? ?????. imagecopy? imagecopymerge? ???? ??? ???? ?? ?? ??? ???? ??? ????.

??? ??? ?? ??? ??? ?????.

<?php
//打開目標圖片
$dst = imagecreatefrompng('/upload/course/000/000/002/5833ebba648cf229.png');

//打開Logo來源圖片
$src = imagecreatefrompng('/upload/course/000/000/002/5833ebe90cc11285.png');

//得到目標圖片的寬高
$dst_info = getimagesize('5833ebba648cf229.png');

//得到logo圖片的寬高
$src_info = getimagesize('5833ebe90cc11285.png');

//放到最右下腳可得出圖片水印圖片需要開始的位置即:
//x點位置:需要大圖的寬 - 小圖的寬;
//y點位置:放大圖的高 - 小圖的高

$dst_x = $dst_info[0] - $src_info[0];

$dst_y = $dst_info[1] - $src_info[1];

//要將圖片加在右下腳
imagecopymerge($dst, $src, $dst_x, $dst_y, 0, 0, $src_info[0], $src_info[1], 100);

header('Content-type:image/png');
imagepng($dst);

imagedestroy($dst);

imagedestroy($src);

?>

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11.png

2. A? ???. ??? ??? ???? ??

1. ???? ???? ?? ??? ?? ? ????

??? ??? ??? ?? ?? ??? ?? ??? ?? ?????.

1.

2.imagecreatetruecolor

3.imagecreatefromjpeg ?

??? ???. ???? MIME ??? ?? ??? ?? ? ??? MIME ??? ???? ??? ?? ??? ?? ? ????.

??? ? ??? ? ???? ????.

1. ?? MIME ??? ?? ??? ?????.

2. ??? ????, ??? ??, ???? ?????.

???? ?? ? ??? ? ?? ???? ?? ? ????.

??? ??? ????, ???? ??, ??, MIME ??? ??? ????, ??? ? ?? ????? ?????.

$data? ?? ?? ??? MIME ??? ??? ? ????. ??? ??? ????.

function getImageInfo($path) {
    $info = getimagesize($path);
    $data['width'] = $info[0];
    $data['height'] = $info[1];
    $data['type'] = $info['mime'];
    return $data;
}

??? ?? ??? ??? ???? ??? ??? ???? ???? ??? ??? ??? ???? ?????.

?? ???? $type? switch...case? ???? ?????. imagejpeg? ?? $path? ??? ??? ??? ??? ?? ? imagecreatefromjpeg? ?????. ????? ??? ??? ?????.

function openImg($path, $type) {
    switch ($type) {
        case 'image/jpeg':
        case 'image/jpg':
        case 'image/pjpeg':
            $img = imagecreatefromjpeg($path);
            break;
        case 'image/png':
        case 'image/x-png':
            $img = imagecreatefrompng($path);
            break;
        case 'image/gif':
            $img = imagecreatefromgif($path);
            break;
        case 'image/wbmp':
            $img = imagecreatefromwbmp($path);
            break;
        default:
            exit('圖片類型不支持');
    }
    return $img;
}

?? ?? ??:

??? 0~9 ??? 10? ??? ?? ? ????.

??? ???? ??? ?????.

document_2015-09-22_5600ef919671d.png


??:
0? ??? ???? ??? ? ????. ???? ?? ????. ??? ??? ??? ??? ?? ????.

0? ??:

x = 0 至 (大圖寬 - 小圖寬)
y = 0 至  (大圖高 - 小圖高)

1? ??:

x = 0 
y = 0

2? ??:

x = (大圖寬 - 小圖寬) /2 
y = 0

3? ??: :

x = 大圖寬 - 小圖寬
y = 0

4? ???

x = 0
y = (大圖高 - 小圖高) / 2

... ...????.

0~9? ?? ??? ?? ??? ?????.

 switch($pos){
        case 1:
            $x=0;
            $y=0;
            break;
        case 2:
            $x=ceil(($info['width']-$logo['width'])/2);
            $y=0;
            break;
        case 3:
            $x=$info['width']-$logo['width'];
            $y=0;
            break;
        case 4:
            $x=0;
            $y=ceil(($info['height']-$logo['height'])/2);
            break;
        case 5:
            $x=ceil(($info['width']-$logo['width'])/2);
            $y=ceil(($info['height']-$logo['height'])/2);
            break;
        case 6:
            $x=$info['width']-$logo['width'];
            $y=ceil(($info['height']-$logo['height'])/2);
            break;
        case 7:
            $x=0;
            $y=$info['height']-$logo['height'];
            break;
        case 8:
            $x=ceil(($info['width']-$logo['width'])/2);
            $y=$info['height']-$logo['height'];
            break;
        case 9:
            $x=$info['width']-$logo['width'];
            $y=$info['height']-$logo['height'];
            break;
        case 0:
        default:
            $x=mt_rand(0,$info['width']-$logo['width']);
            $y=mt_rand(0,$y=$info['height']-$logo['height']);
            break;
    }

????? ??? ??, ?? ? ?? ??? ?????.

imagecopymerge($dst,$src,$x,$y,0,0,$logo['width'],$logo['height'],$tm);

? ? ?? ??? ?????. , ??? ? ? ?? ??? ?????:

rree

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??? ?? ??? ??? ??? ???? ????. ?? ???? Fan Bingbing ??? ?? ??? ????.

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??? ?????!


???? ??
||
<?php water('zxy.jpg','logo.gif',0,50); function water($img,$water,$pos=9,$tm=100){ $info=getImageInfo($img); $logo=getImageInfo($water); $dst=openImg($img,$info['type']); $src=openImg($water,$logo['type']); switch($pos){ case 1: $x=0; $y=0; break; case 2: $x=ceil(($info['width']-$logo['width'])/2); $y=0; break; case 3: $x=$info['width']-$logo['width']; $y=0; break; case 4: $x=0; $y=ceil(($info['height']-$logo['height'])/2); break; case 5: $x=ceil(($info['width']-$logo['width'])/2); $y=ceil(($info['height']-$logo['height'])/2); break; case 6: $x=$info['width']-$logo['width']; $y=ceil(($info['height']-$logo['height'])/2); break; case 7: $x=0; $y=$info['height']-$logo['height']; break; case 8: $x=ceil(($info['width']-$logo['width'])/2); $y=$info['height']-$logo['height']; break; case 9: $x=$info['width']-$logo['width']; $y=$info['height']-$logo['height']; break; case 0: default: $x=mt_rand(0,$info['width']-$logo['width']); $y=mt_rand(0,$y=$info['height']-$logo['height']); break; } imagecopymerge($dst,$src,$x,$y,0,0,$logo['width'],$logo['height'],$tm); imagejpeg($dst); imagedestory($dst); imagedestory($src); } function openImg($path,$type){ switch($type){ case 'image/jpeg': case 'image/jpg': case 'image/pjpeg': $img=imagecreatefromjpeg($path); break; case 'image/png': case 'image/x-png': $img=imagecreatefrompng($path); break; case 'image/gif': $img=imagecreatefromgif($path); break; case 'image/wbmp': $img=imagecreatefromwbmp($path); break; default: exit('圖片類型不支持'); } return $img; } ?>