国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Home php教程 php手冊 gd庫圖片下載類實現(xiàn)下載網(wǎng)頁所有圖片的php代碼

gd庫圖片下載類實現(xiàn)下載網(wǎng)頁所有圖片的php代碼

Jun 13, 2016 am 11:59 AM
content header php download code Image download copy accomplish Library of kind Web page

php代碼如下:

復制代碼 代碼如下:


header("Content-type:text/html ; charset=utf-8");
if (!empty($_POST['submit'])){
$url = $_POST['url'];
//為了獲取相對路徑的圖片所做的操作
$url_fields = parse_url($url);
$main_url = $url_fields['host'];
$base_url = substr($url,0,strrpos($url, '/')+1);
//獲取網(wǎng)頁內(nèi)容
//設置代理服務器
$opts = array('http'=>array('request_fulluri'=>true));
$context = stream_context_create($opts);
$content = file_get_contents($url,false,$context);
//匹配img標簽,將所有匹配字符串保存到數(shù)組$matches
$reg = "/gd庫圖片下載類實現(xiàn)下載網(wǎng)頁所有圖片的php代碼/i";
preg_match_all($reg, $content, $matches);
$count = count($matches[0]);
for ($i=0; $i/*將所有圖片的url轉換為小寫
*$matches[1][$i] = strtolower($matches[1][$i]);
*/
//如果圖片為相對路徑就轉化為全路徑
if (!strpos('a'.$matches[1][$i], 'http')){
//因為'/'是第0個位置
if (strpos('a'.$matches[1][$i], '/')){
$matches[1][$i] = 'http://'.$main_url.$matches[1][$i];
}else{
$matches[1][$i] = $base_url.$matches[1][$i];
}
}
}
//過濾重復的圖片
$img_arr = array_unique($matches[1]);
//實例化圖片下載類
$getImg = new DownImage();
$url_count = count($img_arr);
for ($i=0; $i$getImg->source = $img_arr[$i];
$getImg->save_address = './pic/';
$file = $getImg->download();
}
echo "下載完成!哈哈,簡單吧!";
}
class DownImage{
public $source;//遠程圖片URL
public $save_address;//保存本地地址
public $set_extension; //設置圖片擴展名
public $quality; //圖片的質量(0~100,100最佳,默認75左右)
//下載方法(選用GD庫圖片下載)
public function download(){
//獲取遠程圖片信息
$info = @getimagesize($this->source);
//獲取圖片擴展名
$mime = $info['mime'];
$type = substr(strrchr($mime, '/'), 1);
//不同的圖片類型選擇不同的圖片生成和保存函數(shù)
switch($type){
case 'jpeg':
$img_create_func = 'imagecreatefromjpeg';
$img_save_func = 'imagejpeg';
$new_img_ext = 'jpg';
$image_quality = isset($this->quality) ? $this->quality : 100;
break;
case 'png':
$img_create_func = 'imagecreatefrompng';
$img_save_func = 'imagepng';
$new_img_ext = 'png';
break;
case 'bmp':
$img_create_func = 'imagecreatefrombmp';
$img_save_func = 'imagebmp';
$new_img_ext = 'bmp';
break;
case 'gif':
$img_create_func = 'imagecreatefromgif';
$img_save_func = 'imagegif';
$new_img_ext = 'gif';
break;
case 'vnd.wap.wbmp':
$img_create_func = 'imagecreatefromwbmp';
$img_save_func = 'imagewbmp';
$new_img_ext = 'bmp';
break;
case 'xbm':
$img_create_func = 'imagecreatefromxbm';
$img_save_func = 'imagexbm';
$new_img_ext = 'xbm';
break;
default:
$img_create_func = 'imagecreatefromjpeg';
$img_save_func = 'imagejpeg';
$new_img_ext = 'jpg';
}
//根據(jù)是否設置擴展名來合成本地文件名
if (isset($this->set_extension)){
$ext = strrchr($this->source,".");
$strlen = strlen($ext);
$newname = basename(substr($this->source,0,-$strlen)).'.'.$new_img_ext;
}else{
$newname = basename($this->source);
}

//生成本地文件路徑
$save_address = $this->save_address.$newname;
$img = @$img_create_func($this->source);
if (isset($image_quality)){
$save_img = @$img_save_func($img,$save_address,$image_quality);
}else{
$save_img = @$img_save_func($img,$save_address);
}
return $save_img;
}
}
?>


遠程url地址:



運行結果如圖:

下載的圖片本例中保存在當前目錄的pic文件夾下!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What is PHP, and why is it used for web development? What is PHP, and why is it used for web development? Jun 23, 2025 am 12:55 AM

PHPbecamepopularforwebdevelopmentduetoitseaseoflearning,seamlessintegrationwithHTML,widespreadhostingsupport,andalargeecosystemincludingframeworkslikeLaravelandCMSplatformslikeWordPress.Itexcelsinhandlingformsubmissions,managingusersessions,interacti

How do I stay up-to-date with the latest PHP developments and best practices? How do I stay up-to-date with the latest PHP developments and best practices? Jun 23, 2025 am 12:56 AM

TostaycurrentwithPHPdevelopmentsandbestpractices,followkeynewssourceslikePHP.netandPHPWeekly,engagewithcommunitiesonforumsandconferences,keeptoolingupdatedandgraduallyadoptnewfeatures,andreadorcontributetoopensourceprojects.First,followreliablesource

How to set PHP time zone? How to set PHP time zone? Jun 25, 2025 am 01:00 AM

TosettherighttimezoneinPHP,usedate_default_timezone_set()functionatthestartofyourscriptwithavalididentifiersuchas'America/New_York'.1.Usedate_default_timezone_set()beforeanydate/timefunctions.2.Alternatively,configurethephp.inifilebysettingdate.timez

What is data serialization in PHP (serialize(), unserialize())? What is data serialization in PHP (serialize(), unserialize())? Jun 22, 2025 am 01:03 AM

ThePhpfunctionSerialize () andunserialize () AreusedtoconvertcomplexdaTastructdestoresintostoraSandaBackagain.1.Serialize () c OnvertsdatalikecarraysorobjectsraystringcontainingTypeandstructureinformation.2.unserialize () Reconstruct theoriginalatataprom

How do I embed PHP code in an HTML file? How do I embed PHP code in an HTML file? Jun 22, 2025 am 01:00 AM

You can embed PHP code into HTML files, but make sure that the file has an extension of .php so that the server can parse it correctly. Use standard tags to wrap PHP code, insert dynamic content anywhere in HTML. In addition, you can switch PHP and HTML multiple times in the same file to realize dynamic functions such as conditional rendering. Be sure to pay attention to the server configuration and syntax correctness to avoid problems caused by short labels, quotation mark errors or omitted end labels.

What are the best practices for writing clean and maintainable PHP code? What are the best practices for writing clean and maintainable PHP code? Jun 24, 2025 am 12:53 AM

The key to writing clean and easy-to-maintain PHP code lies in clear naming, following standards, reasonable structure, making good use of comments and testability. 1. Use clear variables, functions and class names, such as $userData and calculateTotalPrice(); 2. Follow the PSR-12 standard unified code style; 3. Split the code structure according to responsibilities, and organize it using MVC or Laravel-style catalogs; 4. Avoid noodles-style code and split the logic into small functions with a single responsibility; 5. Add comments at key points and write interface documents to clarify parameters, return values ??and exceptions; 6. Improve testability, adopt dependency injection, reduce global state and static methods. These practices improve code quality, collaboration efficiency and post-maintenance ease.

How do I execute SQL queries using PHP? How do I execute SQL queries using PHP? Jun 24, 2025 am 12:54 AM

Yes,youcanrunSQLqueriesusingPHP,andtheprocessinvolveschoosingadatabaseextension,connectingtothedatabase,executingqueriessafely,andclosingconnectionswhendone.Todothis,firstchoosebetweenMySQLiorPDO,withPDObeingmoreflexibleduetosupportingmultipledatabas

How do I use page caching in PHP? How do I use page caching in PHP? Jun 24, 2025 am 12:50 AM

PHP page caching improves website performance by reducing server load and speeding up page loading. 1. Basic file cache avoids repeated generation of dynamic content by generating static HTML files and providing services during the validity period; 2. Enable OPcache to compile PHP scripts into bytecode and store them in memory, improving execution efficiency; 3. For dynamic pages with parameters, they should be cached separately according to URL parameters, and avoid cached user-specific content; 4. Lightweight cache libraries such as PHPFastCache can be used to simplify development and support multiple storage drivers. Combining these methods can effectively optimize the caching strategy of PHP projects.

See all articles