PHP图片水印效果的实例代码

  烈火网(LieHuo.Net)教程 PHP图片水印效果的实例代码

以下为引用的内容:
<?php

//$backFile: 背景图
//$copyFile: 待拷贝的图
//$resultFile: 生成文件保存地址
//$copyToX: 拷贝到背景图上的X坐标
//$copyToY: 拷贝到背景图上的Y坐标
//$copyToWidth: 把待拷贝的图变为多宽
//$copyToHeight: 把待拷贝的图变为多高
function ImgMerge($backFile,$copyFile,$resultFile,$copyToX,$copyToY,$copyToWidth,$copyToHeight)
{
//如果文件名后缀不是"PNG"则返回""
if (GetFileUpperExt($backFile) != "PNG")
return "";
//如果文件名后缀不是"PNG"则返回""
if (GetFileUpperExt($copyFile) != "PNG")
return "";
$backImg = ImageCreateFromPng($backFile);
//如果值没有设置,则返回""
if (!isset($backImg ))
{
return "";
}
$backImgX = ImageSX($backImg);
$backImgY = ImageSX($backImg);

$copyImg = ImageCreateFromPng($copyFile);
//如果值没有设置,则返回""
if (!isset($copyImg ))
{
return "";
}
$copyResizeImg = ImageResize($copyImg, $copyToWidth, $copyToHeight);

$bCopy = ImageCopy($backImg,$copyResizeImg,$copyToX,$copyToY,0,0,$copyToWidth,$copyToHeight);
if (!$bCopy )
{
return "";
}
ImageAlphaBlending($backImg, true);
ImageSaveAlpha($backImg, true);

if (!ImagePng($backImg,$resultFile))
return "";
return $resultFile;
}

//获得传入文件的文件名
function GetFileUpperExt($fullFile)
{
if (!File_Exists($fullFile))
return "";
$pathInfo = PathInfo($fullFile );
return StrToUpper($pathInfo['extension']);
}

function ImageResize($rImage, $iWidth, $iHeight)
{
$iCanvas = ImageCreate($iWidth, $iHeight);
$iWidthX = ImageSX($rImage);
$iHeightY = ImageSY($rImage);
ImageCopyResampled($iCanvas, $rImage, 0, 0, 0, 0, $iWidth, $iHeight, $iWidthX, $iHeightY);
return $iCanvas;
}

ImgMerge("06.png","123.png","07.png",370,285,150,15);

?>

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