PHP添加图片水印、压缩、剪切的封装类
发布:smiling 来源: PHP粉丝网 添加日期:2021-06-16 11:50:30 浏览: 评论:0
为了防止自己辛苦制作的作品被别人窃取,经常给作品添加水印,以此保证作品的唯一性,那么该怎么给图片添加水印呢,如果作品尺寸过大,该如何处理呢,下面小编给大家详细介绍有关PHP给图片添加水印 压缩 剪切的封装类,需要的朋友可以参考下
给图片添加水印,其实就是把原来的图片和水印添加在一起,下面小编把最近整理的资料分享给大家。
php对图片文件的操作主要是利用GD库扩展。当我们频繁利用php对图片进行操作时,会自然封装很多函数,否则会写太多重复的代码。当有很多对图片的相关函数的时候,我们可以考虑将这些函数也整理一下,因而就有了封装成类的想法。
操作图片主要历经四个步骤:
第一步:打开图片
第二步:操作图片
第三步:输出图片
第四步:销毁图片
1,3,4三个步骤每次都要写,每次又都差不多。真正需要变通的只有操作图片的这一步骤了。操作图片又往往通过1或多个主要的GD函数来完成。
本文封装类里面的四种方法,文字水印(imagettftext()),图片水印(imagecopymerge()),图片压缩,图片剪切(imagecopyresampled()),其余的常用GD函数便不赘述。
直接上代码:
- <?php
- class Image
- {
- private $info;
- private $image;
- public $type;
- public function __construct($src)
- {
- $this->info=getimagesize($src);
- $this->type=image_type_to_extension($this->info['2'],false);
- $fun="imagecreatefrom{$this->type}";
- $this->image=$fun($src);
- }
- /**
- * 文字水印
- * @param [type] $font 字体
- * @param [type] $content 内容
- * @param [type] $size 文字大小
- * @param [type] $col 文字颜色(四元数组)
- * @param array $location 位置
- * @param integer $angle 倾斜角度
- * @return [type]
- */
- public function fontMark($font,$content,$size,$col,$location,$angle=0){
- $col=imagecolorallocatealpha($this->image, $col['0'], $col['1'], $col['2'],$col['3']);
- imagettftext($this->image, $size, $angle, $location['0'], $location['1'], $col,$font,$content);
- }
- /**
- * 图片水印
- * @param [type] $imageMark 水印图片地址
- * @param [type] $dst 水印图片在原图片中的位置
- * @param [type] $pct 透明度
- * @return [type]
- */
- public function imageMark($imageMark,$dst,$pct){
- $info2=getimagesize($imageMark);
- $type=image_type_to_extension($info2['2'],false);
- $func2="imagecreatefrom".$type;
- $water=$func2($imageMark);
- imagecopymerge($this->image, $water, $dst[0], $dst[1], 0, 0, $info2['0'], $info2['1'], $pct);
- imagedestroy($water);
- }
- /**
- * 压缩图片
- * @param [type] $thumbSize 压缩图片大小
- * @return [type] [description]
- */
- public function thumb($thumbSize){
- $imageThumb=imagecreatetruecolor($thumbSize[0], $thumbSize[1]);
- imagecopyresampled($imageThumb, $this->image, 0, 0, 0, 0, $thumbSize[0], $thumbSize[1], $this->info['0'], $this->info['1']);
- imagedestroy($this->image);
- $this->image=$imageThumb;
- }
- /**
- * 裁剪图片
- * @param [type] $cutSize 裁剪大小
- * @param [type] $location 裁剪位置
- * @return [type] [description]
- */
- public function cut($cutSize,$location){
- $imageCut=imagecreatetruecolor($cutSize[0],$cutSize[1]);
- imagecopyresampled($imageCut, $this->image, 0, 0, $location[0], $location[1],$cutSize[0],$cutSize[1],$cutSize[0],$cutSize[1]);
- imagedestroy($this->image);
- $this->image=$imageCut;
- }
- /**
- * 展现图片
- * @return [type] [description]
- */
- public function show(){
- header("content-type:".$this->info['mime']);
- $funn="image".$this->type;
- $funn($this->image);
- }
- /**
- * 保存图片
- * @param [type] $newname 新图片名
- * @return [type] [description]
- */
- public function save($newname){
- header("content-type:".$this->info['mime']);
- $funn="image".$this->type;
- $funn($this->image,$newname.'.'.$this->type);
- }
- public function __destruct(){
- imagedestroy($this->image);
- }
- }
- ?>
如果还需要其他操作,只需要再往这个类里面添加就好啦~~
给图片添加水印代码:
先看文件check_image_addwatermark.php代码
- <?php
- //修改图片效果
- $db = mysql_connect('localhost','root','Ctrip07185419') or die('can not connect to database');
- mysql_select_db('moviesite',$db) or die(mysql_error($db));
- //上传文件的路径
- $dir = 'D:\Serious\phpdev\test\images';
- //设置环境变量
- putenv('GDFONTPATH='.'C:\Windows\Fonts');
- $font = "arial";
- //upload_image.php页面传递过来的参数,如果是上传图片
- if($_POST['submit'] == 'Upload')
- {
- if($_FILES['uploadfile']['error'] != UPLOAD_ERR_OK)
- {
- switch($_FILES['uploadfile']['error'])
- {
- case UPLOAD_ERR_INI_SIZE:
- die('The uploaded file exceeds the upload_max_filesize directive');
- break;
- case UPLOAD_ERR_FORM_SIZE:
- die('The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form');
- break;
- case UPLOAD_ERR_PARTIAL:
- die('The uploaded file was only partially uploaded');
- break;
- case UPLOAD_ERR_NO_FILE:
- die('No file was uploaded');
- break;
- case UPLOAD_ERR_NO_TMP_DIR:
- die('The server is missing a temporary folder');
- break;
- case UPLOAD_ERR_CANT_WRITE:
- die('The server fail to write the uploaded file to the disk');
- break;
- case UPLOAD_ERR_EXTENSION:
- die('The upload stopped by extension');
- break;
- }
- }
- $image_caption = $_POST['caption'];
- $image_username = $_POST['username'];
- $image_date = date('Y-m-d');
- list($width,$height,$type,$attr) = getimagesize($_FILES['uploadfile']['tmp_name']);
- $error = 'The file you upload is not a supported filetype';
- switch($type)
- {
- case IMAGETYPE_GIF:
- $image = imagecreatefromgif($_FILES['uploadfile']['tmp_name']) or die($error);
- break;
- case IMAGETYPE_JPEG:
- $image = imagecreatefromjpeg($_FILES['uploadfile']['tmp_name']) or die($error);
- break;
- case IMAGETYPE_PNG:
- $image = imagecreatefrompng($_FILES['uploadfile']['tmp_name']) or die($error);
- break;
- default:
- break;
- }
- $query = 'insert into images(image_caption,image_username,image_date) values("'.$image_caption.'" , "'.$image_username.'","'.$image_date.'")';
- $result = mysql_query($query,$db) or die(mysql_error($db));
- $last_id = mysql_insert_id();
- // $imagename = $last_id.'.jpg';
- // imagejpeg($image,$dir.'/'.$imagename);
- // imagedestroy($image);
- $image_id = $last_id;
- imagejpeg($image , $dir.'/'.$image_id.'.jpg');
- imagedestroy($image);
- }
- else //如果图片已经上传,则从数据库中取图片名字
- {
- $query = 'select image_id,image_caption,image_username,image_date from images where image_id='.$_POST['id'];
- $result = mysql_query($query,$db) or die(mysql_error($db));
- extract(mysql_fetch_assoc($result));
- list($width,$height,$type,$attr) = getimagesize($dir.'/'.$image_id.'.jpg');
- }
- //如果是保存图片
- if($_POST['submit'] == 'Save')
- {
- if(isset($_POST['id']) && ctype_digit($_POST['id']) && file_exists($dir.'/'.$_POST['id'].'.jpg'))
- {
- $image = imagecreatefromjpeg($dir.'/'.$_POST['id'].'.jpg');
- }
- else
- {
- die('invalid image specified');
- }
- $effect = (isset($_POST['effect'])) ? $_POST['effect'] : -1;
- switch($effect)
- {
- case IMG_FILTER_NEGATE:
- imagefilter($image , IMG_FILTER_NEGATE); //将图像中所有颜色反转
- break;
- case IMG_FILTER_GRAYSCALE:
- imagefilter($image , IMG_FILTER_GRAYSCALE); //将图像转换为灰度的
- break;
- case IMG_FILTER_EMBOSS:
- imagefilter($image , IMG_FILTER_EMBOSS); //使图像浮雕化
- break;
- case IMG_FILTER_GAUSSIAN_BLUR:
- imagefilter($image , IMG_FILTER_GAUSSIAN_BLUR); //用高斯算法模糊图像
- break;
- }
- if(isset($_POST['emb_caption']))
- {
- imagettftext($image , 12 , 0 , 20 , 20 , 0 , $font , $image_caption);
- }
- if(isset($_POST['emb_logo']))
- {
- //获取水印图片的尺寸并创建水印
- list($wmk_width , $wmk_height) = getimagesize('images/logo.png');
- $x = ($width-$wmk_width) / 2;
- $y = ($height-$wmk_height)/2;
- $wmk = imagecreatefrompng('images/logo.png');
- //把水印图片和原图片合并在一起
- imagecopymerge($image , $wmk , $x , $y , 0 , 0 , $wmk_width , $wmk_height , 20);
- //清除水印图片
- imagedestroy($wmk);
- }
- imagejpeg($image , $dir.'/'.$_POST['id'].'.jpg' , 100);
- ?>
- <html>
- <head>
- <title>Here is your pic!</title>
- </head>
- <body>
- <h1>Your image has been saved!</h1>
- <img src="images/<?php echo $_POST['id'];?>.jpg" alt="" />
- </body>
- </html>
- <?php
- }
- else
- {
- ?>
- <html>
- <head>
- <title>Here is your pic!</title>
- </head>
- <body>
- <h1>So how does it feel to be famous?</h1>
- <p>Here is the picture you just uploaded to your servers:</p>
- <!--<img src="images/<?php echo $imagename;?>" alt="" style="float:left;" />-->
- </body>
- </html>
- <?php
- if($_POST['submit'] == 'Upload')
- {
- $imagename = 'images/'.$image_id.'.jpg';
- }
- else
- {
- $imagename = 'image_effect.php?id='.$image_id.'&e='.$_POST['effect'];
- if(isset($_POST['emb_caption']))
- {
- $imagename .= '&capt='.urlencode($image_caption);
- }
- if(isset($_POST['emb_logo']))
- {
- $imagename .= '&logo=1';
- }
- }
- ?>
- <img src="<?php echo $imagename;?>" style="float:left;" alt="" />
- <table>
- <tr>
- <td>Image save as:</td>
- <td><?php $image_id?></td>
- </tr>
- <tr>
- <td>Height:</td>
- <td><?php echo $height;?></td>
- </tr>
- <tr>
- <td>Widht:</td>
- <td><?php echo $width;?></td>
- </tr>
- <tr>
- <td>Upload date:</td>
- <td><?php echo $image_date;?></td>
- </tr>
- </table>
- <p>You may apply a special effect to your image from the list of option below.
- Note:saving an image with any of the filters applied <em>can be undone</em>
- </p>
- <form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">
- <div>
- <input type="hidden" name="id" value="<?php echo $image_id;?>"/>
- Filter:<select name="effect" id="">
- <option value="-1">None</option>
- <?php
- echo '<option value="'.IMG_FILTER_GRAYSCALE.'" ';
- if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_GRAYSCALE)
- {
- echo 'selected="selected"';
- }
- echo ' >Black and white</option>';
- echo '<option value="'.IMG_FILTER_GAUSSIAN_BLUR.'"';
- if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_GAUSSIAN_BLUR)
- {
- echo ' selected="selected"';
- }
- echo '>Blur</option>';
- echo '<option value="'.IMG_FILTER_EMBOSS.'"';
- if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_EMBOSS)
- {
- echo 'selected="selected"';
- }
- echo '>Emboss</option>';
- echo '<option value="'.IMG_FILTER_NEGATE.'"';
- if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_NEGATE)
- {
- echo 'selected="selected"';
- }
- echo '>Negative</option>';
- ?>
- </select><br />
- <?php
- echo '<input type="checkbox" name="emb_caption"';
- if(isset($_POST['emb_caption']))
- {
- echo ' checked="checked"';
- }
- echo ' />Embed caption in image?';
- echo '<br />';
- //添加水印选项
- echo '<input type="checkbox" name="emb_logo" ';
- if(isset($_POST['emb_logo']))
- {
- echo 'checked="checked"';
- }
- echo ' />Embed watermarked logo in image?';
- ?>
- <input type="submit" value="Preview" name="submit" /><br /><br />
- <input type="submit" value="Save" name="submit" />
- </div>
- </form>
- <?php
- }
- ?>
这里面主要是添加水印选项,如果选中添加水印则将logo.png作为水印图片和原来的图片合并在一起。
在预览文件中添加了对应的逻辑,代码如下:
- <?php
- $dir = 'D:\Serious\phpdev\test\images';
- //设置环境变量
- putenv('GDFONTPATH='.'C:\Windows\Fonts');
- $font = "arial";
- if(isset($_GET['id']) && ctype_digit($_GET['id']) && file_exists($dir.'/'.$_GET['id'].'.jpg'))
- {
- $image = imagecreatefromjpeg($dir.'/'.$_GET['id'].'.jpg');
- }
- else
- {
- die('invalid image specified');
- }
- $effect = (isset($_GET['e'])) ? $_GET['e'] : -1;
- switch($effect)
- {
- case IMG_FILTER_NEGATE:
- imagefilter($image , IMG_FILTER_NEGATE);
- break;
- case IMG_FILTER_GRAYSCALE:
- imagefilter($image , IMG_FILTER_GRAYSCALE);
- break;
- case IMG_FILTER_EMBOSS:
- imagefilter($image , IMG_FILTER_EMBOSS);
- break;
- case IMG_FILTER_GAUSSIAN_BLUR:
- imagefilter($image , IMG_FILTER_GAUSSIAN_BLUR);
- break;
- }
- if(isset($_GET['capt']))
- {
- //echo $_GET['capt'];
- imagettftext($image, 12, 0, 20, 20, 0, $font, $_GET['capt']);
- }
- if(isset($_GET['logo']))
- {
- list($widht , $height) = getimagesize($dir.'/'.$_GET['id'].'.jpg');
- list($wmk_width , $wmk_height) = getimagesize('images/logo.png');
- $x = ($widht-$wmk_width) / 2;
- $y = ($height-$wmk_height) / 2;
- $wmk = imagecreatefrompng('images/logo.png');
- imagecopymerge($image , $wmk , $x , $y , 0 , 0 , $wmk_width , $wmk_height , 20);
- imagedestroy($wmk);
- }
- header('Content-Type:image/jpeg');
- imagejpeg($image , '' , 100);
- ?>
最后上传的水印图片效果如下:
注意主要的逻辑就是通过 imagecopymerge() 方法把两个图片合并在一起造成水印效果。来看看这个方法的方法原型和参数:
bool imagecopymerge ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int$src_x , int $src_y , int $src_w , int $src_h , int $pct )
将 src_im 图像中坐标从 src_x,src_y 开始,宽度为 src_w,高度为 src_h 的一部分拷贝到 dst_im 图像中坐标为 dst_x 和 dst_y 的位置上。两图像将根据 pct 来决定合并程度,其值范围从 0 到 100。当 pct = 0 时,实际上什么也没做,当为 100 时对于调色板图像本函数和 imagecopy() 完全一样,它对真彩色图像实现了 alpha 透明。
以上内容是本文介绍PHP给图片添加水印 压缩 剪切的封装类的全部内容,希望大家对本文介绍感兴趣。
Tags: PHP图片水印 PHP压缩 PHP剪切
相关文章
- ·PHP为图片添加水印的实例(2013-11-14)
- ·php给图片加水印实例函数(2014-08-18)
- ·php图片加中文水印实现代码(2014-08-19)
- ·php 图片上传代码,支持水印,缩略图(2014-08-19)
- ·php图片增加中文与图片水印代码(2014-08-19)
- ·php图片水印代码 (2014-08-19)
- ·php生成艺术字体图片水印代码(2014-08-19)
- ·php 图片水印中文乱码解决方法(2014-08-19)
- ·php上传图片加水印,图片水印,文字水印(2014-08-19)
- ·php给图片加水印函数(2014-08-20)
- ·php实现图片添加文字水印程序代码(2014-08-26)
- ·php图片上传自动给图片加水印(2014-09-22)
- ·利用php GD库 文字图片水印 缩略图(2015-12-24)
- ·php使用GD库实现文字图片水印及缩略图教程(2016-01-20)
- ·php图片水印添加、压缩、剪切的封装类实现(2021-06-17)
- ·PHP按一定比例压缩图片的方法(2021-10-31)
推荐文章
热门文章
最新评论文章
- 写给考虑创业的年轻程序员(10)
- PHP新手上路(一)(7)
- 惹恼程序员的十件事(5)
- PHP邮件发送例子,已测试成功(5)
- 致初学者:PHP比ASP优秀的七个理由(4)
- PHP会被淘汰吗?(4)
- PHP新手上路(四)(4)
- 如何去学习PHP?(2)
- 简单入门级php分页代码(2)
- php中邮箱email 电话等格式的验证(2)