社区
学习
工具库
AI工具
休闲
搜索
简体中文
目录
Your image has been saved!
So how does it feel to be famous?
首页 php教程 php手册 PHP根据图片制作缩略图

PHP根据图片制作缩略图

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Jun 06, 2016 pm 07:46 PM
php 制作 图片 方法

php中制作缩略图的方法也很简单，是用imagecopyresampled方法根据源图制作一个小一点的图片，来看代码check_image_addthumbs.php ? php // 修改图片效果 $db = mysql_connect ('localhost','root','Ctrip07185419') or die ('can not connect to database' )

php中制作缩略图的方法也很简单，是用imagecopyresampled方法根据源图制作一个小一点的图片，来看代码check_image_addthumbs.php

<span>php 
</span><span>//</span><span>修改图片效果</span>
<span>$db</span> = <span>mysql_connect</span>('localhost','root','Ctrip07185419') or <span>die</span>('can not connect to database'<span>);
</span><span>mysql_select_db</span>('moviesite',<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
</span><span>//</span><span>上传文件的路径</span>
<span>$dir</span> = 'D:\Serious\phpdev\test\images'<span>;
</span><span>//</span><span>缩略图的路径</span>
<span>$thumbdir</span> = 'D:\Serious\phpdev\test\images\thumbs'<span>;
</span><span>//</span><span>设置环境变量</span>
<span>putenv</span>('GDFONTPATH='.'C:\Windows\Fonts'<span>);
</span><span>$font</span> = "arial"<span>;

</span><span>//</span><span>upload_image.php页面传递过来的参数，如果是上传图片</span>
<span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>)
{
    </span><span>if</span>(<span>$_FILES</span>['uploadfile']['error'] !=<span> UPLOAD_ERR_OK)
    {
        </span><span>switch</span>(<span>$_FILES</span>['uploadfile']['error'<span>])
        {
            </span><span>case</span> UPLOAD_ERR_INI_SIZE:
                <span>die</span>('The uploaded file exceeds the upload_max_filesize directive'<span>);
            </span><span>break</span><span>;
            </span><span>case</span> UPLOAD_ERR_FORM_SIZE:
                <span>die</span>('The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'<span>);
            </span><span>break</span><span>;
            </span><span>case</span> UPLOAD_ERR_PARTIAL:
                <span>die</span>('The uploaded file was only partially uploaded'<span>);
            </span><span>break</span><span>;
            </span><span>case</span> UPLOAD_ERR_NO_FILE:
                <span>die</span>('No file was uploaded'<span>);
            </span><span>break</span><span>;
            </span><span>case</span> UPLOAD_ERR_NO_TMP_DIR:
                <span>die</span>('The server is missing a temporary folder'<span>);
            </span><span>break</span><span>;    
            </span><span>case</span> UPLOAD_ERR_CANT_WRITE:
                <span>die</span>('The server fail to write the uploaded file to the disk'<span>);
            </span><span>break</span><span>;        
            </span><span>case</span> UPLOAD_ERR_EXTENSION:
                <span>die</span>('The upload stopped by extension'<span>);
            </span><span>break</span><span>;                
        }
    }
    </span><span>$image_caption</span> = <span>$_POST</span>['caption'<span>];
    </span><span>$image_username</span> = <span>$_POST</span>['username'<span>];
    </span><span>$image_date</span> = <span>date</span>('Y-m-d'<span>);
    </span><span>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]);
    </span><span>$error</span> = 'The file you upload is not a supported filetype'<span>;
    </span><span>switch</span>(<span>$type</span><span>)
    {
        </span><span>case</span> IMAGETYPE_GIF:
            <span>$image</span> = imagecreatefromgif(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><span>);
        </span><span>break</span><span>;
        </span><span>case</span> IMAGETYPE_JPEG:
            <span>$image</span> = imagecreatefromjpeg(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><span>);
        </span><span>break</span><span>;
        </span><span>case</span> IMAGETYPE_PNG:
            <span>$image</span> = imagecreatefrompng(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><span>);
        </span><span>break</span><span>;
        </span><span>default</span>:
        <span>break</span><span>;
    }
    </span><span>$query</span> = 'insert into images(image_caption,image_username,image_date) values("'.<span>$image_caption</span>.'" , "'.<span>$image_username</span>.'","'.<span>$image_date</span>.'")'<span>;
    </span><span>$result</span> = <span>mysql_query</span>(<span>$query</span>,<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
    </span><span>$last_id</span> = <span>mysql_insert_id</span><span>();
    
    </span><span>//</span><span> $imagename = $last_id.'.jpg';
    // imagejpeg($image,$dir.'/'.$imagename);
    // imagedestroy($image);</span>
    
    <span>$image_id</span> = <span>$last_id</span><span>;
    imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$image_id</span>.'.jpg'<span>);
    imagedestroy(</span><span>$image</span><span>);
}
</span><span>else</span>  <span>//</span><span>如果图片已经上传，则从数据库中取图片名字</span>
<span>{
    </span><span>$query</span> = 'select image_id,image_caption,image_username,image_date from images where image_id='.<span>$_POST</span>['id'<span>];
    </span><span>$result</span> = <span>mysql_query</span>(<span>$query</span>,<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
    </span><span>extract</span>(<span>mysql_fetch_assoc</span>(<span>$result</span><span>));
    </span><span>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$dir</span>.'/'.<span>$image_id</span>.'.jpg'<span>);
}

</span><span>//</span><span>如果是保存图片</span>
<span>if</span>(<span>$_POST</span>['submit'] == 'Save'<span>)
{
    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['id']) && <span>ctype_digit</span>(<span>$_POST</span>['id']) && <span>file_exists</span>(<span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg'<span>))
    {
        </span><span>$image</span> = imagecreatefromjpeg(<span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg'<span>);
    }
    </span><span>else</span><span>
    {
        </span><span>die</span>('invalid image specified'<span>);
    }
    </span><span>$effect</span> = (<span>isset</span>(<span>$_POST</span>['effect'])) ? <span>$_POST</span>['effect'] : -1<span>;
    </span><span>switch</span>(<span>$effect</span><span>)
    {
        </span><span>case</span> IMG_FILTER_NEGATE:<span>
            imagefilter(</span><span>$image</span> , IMG_FILTER_NEGATE);     <span>//</span><span>将图像中所有颜色反转</span>
        <span>break</span><span>;
        </span><span>case</span> IMG_FILTER_GRAYSCALE:<span>
            imagefilter(</span><span>$image</span> , IMG_FILTER_GRAYSCALE);  <span>//</span><span>将图像转换为灰度的</span>
        <span>break</span><span>;
        </span><span>case</span> IMG_FILTER_EMBOSS:<span>
            imagefilter(</span><span>$image</span> , IMG_FILTER_EMBOSS);     <span>//</span><span>使图像浮雕化</span>
        <span>break</span><span>;
        </span><span>case</span> IMG_FILTER_GAUSSIAN_BLUR:<span>
            imagefilter(</span><span>$image</span> , IMG_FILTER_GAUSSIAN_BLUR); <span>//</span><span>用高斯算法模糊图像</span>
        <span>break</span><span>;    
    }
    
    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
    {
        imagettftext(</span><span>$image</span> , 12 , 0 , 20 , 20 , 0 , <span>$font</span> , <span>$image_caption</span><span>);
    }
    
    </span><span>$thumb_width</span> = <span>$width</span> * 0.10<span>;
    </span><span>$thumb_height</span> = <span>$height</span> * 0.10<span>;
                   
    </span><span>//</span><span>创建一个缩略图</span>
    <span>$thumb</span> = imagecreatetruecolor(<span>$thumb_width</span>, <span>$thumb_height</span><span>);
    imagecopyresampled(</span><span>$thumb</span>, <span>$image</span>, 0, 0, 0, 0, <span>$thumb_width</span>, <span>$thumb_height</span>,    <span>$width</span>, <span>$height</span><span>);
    </span><span>//</span><span>保存原图</span>
    imagejpeg(<span>$image</span>, <span>$dir</span> . '/' . <span>$_POST</span>['id'] . '.jpg', 100<span>);
    </span><span>//</span><span>保存缩略图</span>
    imagejpeg(<span>$thumb</span>, <span>$thumbdir</span> . '/' . <span>$_POST</span>['id'] . '.jpg', 100<span>);
    imagedestroy(</span><span>$thumb</span><span>);
    </span>?>
    
        
            <title>Here is your pic!</title>
        
        
            <h1 id="Your-image-has-been-saved">Your image has been saved!</h1>
            <img  src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F191004384812967.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3736281.html" class="lazy" id alt="PHP根据图片制作缩略图" >.jpg" alt="" />
        
    
<span>php 
}
</span><span>else</span><span>
{
</span>?>
    
        
            <title>Here is your pic!</title>
        
        
            <h1 id="So-how-does-it-feel-to-be-famous">So how does it feel to be famous?</h1>
            <p>Here is the picture you just uploaded to your servers:</p>
            <!--<img src="/static/imghw/default1.png"  data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F191004384812967.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3736281.html"  class="lazy" alt=""   style="max-width:90%" />-->
        
    
    <span>php
        </span><span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>)
        {
            </span><span>$imagename</span> = 'images/'.<span>$image_id</span>.'.jpg'<span>;
        }
        </span><span>else</span><span>
        {
            </span><span>$imagename</span> = 'image_effect.php?id='.<span>$image_id</span>.'&e='.<span>$_POST</span>['effect'<span>];
            </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
            {
                </span><span>$imagename</span> .= '&capt='.<span>urlencode</span>(<span>$image_caption</span><span>);
            }
        }
    </span>?>
    <img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F191004384812967.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3736281.html" class="lazy"   style="max-width:90%" alt="">
登录后复制
Image save as: $image_id?>
Height: echo $height;?>
Widht: echo $width;?>
Upload date: echo $image_date;?>

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 can be undone

Filter:
php echo '; if(isset($_POST['emb_caption'])) { echo ' checked="checked"'; } echo ' />Embed caption in image?'; ?>

php } ?>

缩略图放在D:\Serious\phpdev\test\images\thumbs路径下面，这里我们添加了一个gallery.php文件来陈列所有的缩略图，代码如下：

<span>php 
</span><span>$db</span> = <span>mysql_connect</span>('localhost','root','Ctrip07185419') or <span>die</span>('can not connect to database'<span>);
</span><span>mysql_select_db</span>('moviesite',<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));

</span><span>$dir</span> = 'images'<span>;
</span><span>$thumbdir</span> = <span>$dir</span>.'/thumbs'<span>;
</span>?>

    
        <title>Welcome to our Photo Gallery</title>
        <style type="text/css"><span>
            th{  background-color:<span>#<span>999; }
            .odd_row { background-color:<span>#<span>EEE;}
            .even_row {background-color:<span>#<span>FFF;}
        </style>
    
    
        <p>Click on any image to see it full sized.</p>
登录后复制
php $result = mysql_query('select * from images') or die(mysql_error($db)); $odd = true; while($row = mysql_fetch_assoc($result)) { echo ($odd == true) ? '' : ''; $odd = !$odd; extract($row); echo ''; echo ''; echo ''; echo ''; echo ''; } ?>
Image Caption Uploaded By Date uploaded
'; echo 'PHP根据图片制作缩略图$thumbdir . '/' . $image_id . '.jpg" alt="" />'; echo ''.$image_caption.''.$image_username.''.$image_date.'

来看看最后显示缩略图的效果：

PHP根据图片制作缩略图

注意下面的代码：

    <span>$thumb_width</span> = <span>$width</span> * 0.10<span>;
    </span><span>$thumb_height</span> = <span>$height</span> * 0.10<span>;
                   
    </span><span>//</span><span>创建一个缩略图</span>
    <span>$thumb</span> = imagecreatetruecolor(<span>$thumb_width</span>, <span>$thumb_height</span><span>);
    imagecopyresampled(</span><span>$thumb</span>, <span>$image</span>, 0, 0, 0, 0, <span>$thumb_width</span>, <span>$thumb_height</span>,    <span>$width</span>, <span>$height</span><span>);
    </span><span>//</span><span>保存原图</span>
    imagejpeg(<span>$image</span>, <span>$dir</span> . '/' . <span>$_POST</span>['id'] . '.jpg', 100<span>);
    </span><span>//</span><span>保存缩略图</span>
    imagejpeg(<span>$thumb</span>, <span>$thumbdir</span> . '/' . <span>$_POST</span>['id'] . '.jpg', 100<span>);
    imagedestroy(</span><span>$thumb</span>);
登录后复制

我们设置缩略图的长度是原来长度的10%，宽度也是原来宽度的10%，注意保持一致，否则图片会出现失真，当然这个参数如果设置成大于1的整数，图片就会放大。

 

本站声明
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn

热AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智能驱动的应用程序，用于创建逼真的裸体照片

AI Clothes Remover

AI Clothes Remover

用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool

Undress AI Tool

免费脱衣服图片

Clothoff.io

Clothoff.io

AI脱衣机

AI Hentai Generator

AI Hentai Generator

免费生成ai无尽的。

显示更多

热门文章

R.E.P.O.能量晶体解释及其做什么（黄色晶体）
2 周前 By 尊渡假赌尊渡假赌尊渡假赌
击败分裂小说需要多长时间？
1 个月前 By DDD
R.E.P.O.保存文件位置：在哪里以及如何保护它？
1 个月前 By DDD
R.E.P.O.最佳图形设置
2 周前 By 尊渡假赌尊渡假赌尊渡假赌
刺客信条阴影：贝壳谜语解决方案
1 周前 By DDD
显示更多

热工具

记事本++7.3.1

记事本++7.3.1

好用且免费的代码编辑器

SublimeText3汉化版

SublimeText3汉化版

中文版，非常好用

禅工作室 13.0.1

禅工作室 13.0.1

功能强大的PHP集成开发环境

Dreamweaver CS6

Dreamweaver CS6

视觉化网页开发工具

SublimeText3 Mac版

SublimeText3 Mac版

神级代码编辑软件(SublimeText3)

显示更多

热门话题

gmail邮箱登陆入口在哪里
7400
15
Java教程
1630
14
CakePHP 教程
1358
52
Laravel 教程
1268
25
PHP教程
1217
29
显示更多
Related knowledge
CakePHP 项目配置 CakePHP 项目配置 Sep 10, 2024 pm 05:25 PM

在本章中，我们将了解CakePHP中的环境变量、常规配置、数据库配置和电子邮件配置。

适用于 Ubuntu 和 Debian 的 PHP 8.4 安装和升级指南 适用于 Ubuntu 和 Debian 的 PHP 8.4 安装和升级指南 Dec 24, 2024 pm 04:42 PM

PHP 8.4 带来了多项新功能、安全性改进和性能改进，同时弃用和删除了大量功能。 本指南介绍了如何在 Ubuntu、Debian 或其衍生版本上安装 PHP 8.4 或升级到 PHP 8.4

CakePHP 日期和时间 CakePHP 日期和时间 Sep 10, 2024 pm 05:27 PM

为了在 cakephp4 中处理日期和时间，我们将使用可用的 FrozenTime 类。

CakePHP 文件上传 CakePHP 文件上传 Sep 10, 2024 pm 05:27 PM

为了进行文件上传，我们将使用表单助手。这是文件上传的示例。

讨论 CakePHP 讨论 CakePHP Sep 10, 2024 pm 05:28 PM

CakePHP 是 PHP 的开源框架。它的目的是使应用程序的开发、部署和维护变得更加容易。 CakePHP 基于类似 MVC 的架构，功能强大且易于掌握。模型、视图和控制器 gu

CakePHP 路由 CakePHP 路由 Sep 10, 2024 pm 05:25 PM

在本章中，我们将学习以下与路由相关的主题？

CakePHP 使用数据库 CakePHP 使用数据库 Sep 10, 2024 pm 05:25 PM

在 CakePHP 中使用数据库非常容易。本章我们将了解CRUD（创建、读取、更新、删除）操作。

CakePHP 创建验证器 CakePHP 创建验证器 Sep 10, 2024 pm 05:26 PM

可以通过在控制器中添加以下两行来创建验证器。

See all articles