這裏我們實現一種水印的效果,微博,淘寶挺多這樣的 於是就嘗試寫了一個方法
這裏我們寫代碼:(postion是水印的位置,9個位置,不在之間隨機存在)
<?php
/*
*@prame resource $bigImage
*@prame resource $smallImage
*@prame string $type;
*@prame string $path;
*@prame bool $isfileName
*@prame int $postion
*@prame int $apahle
*
*
*/
function shuiyin($bigImage,$smallImage,$type ='png',$path = "path",$isfileName = true,$postion =5,$apahle=100){
//打開兩個圖片
$bigImageRes = open($bigImage);
$smallImageRes = open($smallImage);
//獲取大圖和小圖的信息來爲水印的位置做準備
$bigImageInfo = getimagesize($bigImage);
$smallImageInfo = getimagesize($smallImage);
//位置
switch($postion){
case 1:
$x = 0;
$y = 0;
break;
case 2:
$x = ($bigImageInfo[0]-$smallImageInfo[0])/2;
$y = 0;
break;
case 3:
$x = $bigImageInfo[0]-$smallImageInfo[0];
$y = 0;
break;
case 4:
$x = 0;
$y = ($bigImageInfo[1]-$smallImageInfo[1])/2;
break;
case 5:
$x = ($bigImageInfo[0]-$smallImageInfo[0])/2;
$y = ($bigImageInfo[1]-$smallImageInfo[1])/2;
break;
case 6:
$x = $bigImageInfo[0]-$smallImageInfo[0];
$y = ($bigImageInfo[1]-$smallImageInfo[1])/2;
break;
case 7:
$x = 0;
$y= $bigImageInfo[1]-$smallImageInfo[1];
break;
case 8:
$x = ($bigImageInfo[0]-$smallImageInfo[0])/2;
$y = $bigImageInfo[1]-$smallImageInfo[1];
break;
case 9:
$x = $bigImageInfo[0]-$smallImageInfo[0];
$y = $bigImageInfo[1]-$smallImageInfo[1];
break;
default :
$x = mt_rand(0,$bigImageInfo[0]-$smallImageInfo[0]);
$y = mt_rand(0,$bigImageInfo[1]-$smallImageInfo[1]);
break;
}
//合併圖片
imagecopymerge($bigImageRes,$smallImageRes,$x,$y,0,0,$smallImageInfo[0],$smallImageInfo[1],$apahle);
//文件隨機
if($isfileName){
$name = uniqid().'.'.$type;
}else{
$info = pathinfo($path);
$name = $info['filename'].'.'.$type;
}
$path = rtrim($path,'/').'/'.$name;
//輸出圖片
$func = 'image'.$type;
if(!function_exists($func)){
return false;
}
$func($bigImageRes,$path);
imagedestroy($bigImageRes);
imagedestroy($smallImageRes);
return $path;
}
function open($path){
//判斷文件是否存在
if(!file_exists($path)){
return '不存在';
}
$info = getimagesize($path);
switch($info['mime']){
case 'image/jpg':
case 'image/jpeg':
case 'image/jpe':
case 'image/pjpeg':
$res = imagecreatefromjpeg($path);
break;
case 'image/png':
$res = imagecreatefrompng($path);
break;
case 'image/gif':
$res = imagecreatefromgif($path);
break;
}
return $res;
}
shuiyin('big.jpg','small.jpg');