PHP 이미지 업로드 및 워터마킹 예-PHP 튜토리얼-php.cn

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PHP 이미지 업로드 및 워터마킹 예

Jul 25, 2016 am 08:52 AM

有关php图片上传与php加水印的实例代码，一个完整的php上传图片的例子，需要的朋友参考下。

1、send.html

<html>  
 <head>  
  <title>File Uploader</title>
  <meta charset="utf-8">  
 </head>  
 <body>  
  <h3 id="File-Upload">File Upload</h3>  
  Select a file to upload:<br>  
  <form action="img_receive.php" method="post" enctype="multipart/form-data">  
  <input type="file" name="upfile" size="45">  
  <br>  
  <input type="submit" value="Upload File">  
  </form>  
 </body>  
</html>

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2，接收 img_receive.php

<meta charset="utf-8">  
<?php  
//上传文件类型列表  
$uptypes=array(  
    'image/jpg',  
    'image/jpeg',  
    'image/png',  
    'image/pjpeg',  
    'image/gif',  
    'image/bmp',  
    'image/x-png'  
);  
$max_file_size=2000000;   //上传文件大小限制, 单位BYTE  
$destination_folder="up/"; //上传文件路径  
$watermark=1;  //是否附加水印(1为加水印,其他为不加水印);  
$watertype=1;  //水印类型(1为文字,2为图片)  
$waterposition=1; //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);  
$waterstring="http://jbxue.com";  //水印字符串  
$waterimg="xplore.gif";    //水印图片  
$imgpreview=1;      //是否生成预览图(1为生成,其他为不生成);  
$imgpreviewsize=1/2;    //缩略图比例  
  
if ($_SERVER['REQUEST_METHOD'] == 'POST')  
{  
    if (!is_uploaded_file($_FILES["upfile"]['tmp_name']))  
    //是否存在文件  
    {  
         echo "图片不存在!";  
         exit;  
    }  
    $file = $_FILES["upfile"];  
    if($max_file_size < $file["size"])  
    //检查文件大小  
    {  
        echo "文件太大!";  
        exit;  
    }  
    if(!in_array($file["type"], $uptypes))  
    //检查文件类型  
    {  
        echo "文件类型不符!".$file["type"];  
        exit;  
    }  
    if(!file_exists($destination_folder))//检查目标文件是否存在  
    {  
        mkdir($destination_folder);  
    }  
    $filename=$file["tmp_name"];//文件上传的临时文件名  
    $image_size = getimagesize($filename);//专业获取图片大小的方法是一个数组  
    $pinfo=pathinfo($file["name"]);//获取客户端储存文件的地址，是一个数组  
    $ftype=$pinfo['extension'];//从该数组中获取文件的扩展名  
    $destination = $destination_folder.time().".".$ftype;//目标文件起名为当前时间＋扩展名  
    if (file_exists($destination) && $overwrite != true)  
    {  
        echo "同名文件已经存在了";  
        exit;  
    }  
    if(!move_uploaded_file ($filename, $destination))  
    {  
        echo "移动文件出错";  
        exit;  
    }  
    $pinfo=pathinfo($destination);//获取目标文件地址  
    $fname=$pinfo[basename];//获取基础文件名，包括了扩展名  
    echo " <font color=red>已经成功上传</font><br>文件名:  <font color=blue>".$destination_folder.$fname."</font><br>";  
    echo " 宽度:".$image_size[0];  
    echo " 长度:".$image_size[1];  
    echo "<br> 大小:".$file["size"]." bytes";  
    if($watermark==1)//1为添加水印  
    {  
        $iinfo=getimagesize($destination,$iinfo);  
        $nimage=imagecreatetruecolor($image_size[0],$image_size[1]);  
        $white=imagecolorallocate($nimage,255,255,255);  
        $black=imagecolorallocate($nimage,0,0,0);  
        $red=imagecolorallocate($nimage,255,0,0);  
        imagefill($nimage,0,0,$white);  
        switch ($iinfo[2])  
        {  
            case 1:  
            $simage =imagecreatefromgif($destination);  
            break;  
            case 2:  
            $simage =imagecreatefromjpeg($destination);  
            break;  
            case 3:  
            $simage =imagecreatefrompng($destination);  
            break;  
            case 6:  
            $simage =imagecreatefromwbmp($destination);  
            break;  
            default:  
            die("不支持的文件类型");  
            exit;  
        }  
        imagecopy($nimage,$simage,0,0,0,0,$image_size[0],$image_size[1]);  
        imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$white);  
        switch($watertype)  
        {  
            case 1:   //加水印字符串  
            imagestring($nimage,2,3,$image_size[1]-15,$waterstring,$black);  
            break;  
            case 2:   //加水印图片  
            $simage1 =imagecreatefromgif("xplore.gif");  
            imagecopy($nimage,$simage1,0,0,0,0,85,15);  
            imagedestroy($simage1);  
            break;  
        }  
        switch ($iinfo[2])  
        {  
            case 1:  
            //imagegif($nimage, $destination);  
            imagejpeg($nimage, $destination);  
            break;  
            case 2:  
            imagejpeg($nimage, $destination);  
            break;  
            case 3:  
            imagepng($nimage, $destination);  
            break;  
            case 6:  
            imagewbmp($nimage, $destination);  
            //imagejpeg($nimage, $destination);  
            break;  
        }  
        //覆盖原上传文件  
        imagedestroy($nimage);  
        imagedestroy($simage);  
    }  
    if($imgpreview==1)  
    {  
    echo "<br>图片预览:<br>";  
    echo "<img src=\"".$destination."\"    style="max-width:90%" height=".($image_size[1]*$imgpreviewsize);  
    echo " alt=\"图片预览:\r文件名:".$destination."\r上传时间:\">";  
    }  
}

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