This article mainly introduces the method of generating promotional posters in PHP, and analyzes in detail the relevant operating techniques and related precautions for PHP image generation based on specific examples. Friends in need can refer to the examples in this article
Describes the method of generating promotional posters in PHP. Share it with everyone for your reference. The details are as follows:
There is often a need to generate a promotional poster, including a specified QR code, and share it with others to determine the user recommendation relationship.
A careful analysis, the necessary elements for promoting posters are poster background images and QR codes, both of which are easy to generate, but they need to be combined into a two-dimensional image that can be saved to It is easy to share locally, but this is the difficulty. In H5, you can use canvas to draw to complete functions similar to screenshots, but there are many limitations in putting it in a small program. Then we generate the poster directly in the background and call it directly in the front desk.
Preliminary preparation:
1. Poster background image. The background image is generally stored on the server and read locally by the program;
2. Promotion The QR code can be a QR code image link or a string image stream. If you generate the QR code yourself, see for details: Use phpqrcode to generate a QR code.
The method is as follows:
/** * 生成宣传海报 * @param array 参数,包括图片和文字 * @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片 * @return [type] [description] */ function createPoster($config=array(),$filename=""){ //如果要看报什么错,可以先注释调这个header if(empty($filename)) header("content-type: image/png"); $imageDefault = array( 'left'=>0, 'top'=>0, 'right'=>0, 'bottom'=>0, 'width'=>100, 'height'=>100, 'opacity'=>100 ); $textDefault = array( 'text'=>'', 'left'=>0, 'top'=>0, 'fontSize'=>32, //字号 'fontColor'=>'255,255,255', //字体颜色 'angle'=>0, ); $background = $config['background'];//海报最底层得背景 //背景方法 $backgroundInfo = getimagesize($background); $backgroundFun = 'imagecreatefrom'.image_type_to_extension($backgroundInfo[2], false); $background = $backgroundFun($background); $backgroundWidth = imagesx($background); //背景宽度 $backgroundHeight = imagesy($background); //背景高度 $imageRes = imageCreatetruecolor($backgroundWidth,$backgroundHeight); $color = imagecolorallocate($imageRes, 0, 0, 0); imagefill($imageRes, 0, 0, $color); // imageColorTransparent($imageRes, $color); //颜色透明 imagecopyresampled($imageRes,$background,0,0,0,0,imagesx($background),imagesy($background),imagesx($background),imagesy($background)); //处理了图片 if(!empty($config['image'])){ foreach ($config['image'] as $key => $val) { $val = array_merge($imageDefault,$val); $info = getimagesize($val['url']); $function = 'imagecreatefrom'.image_type_to_extension($info[2], false); if($val['stream']){ //如果传的是字符串图像流 $info = getimagesizefromstring($val['url']); $function = 'imagecreatefromstring'; } $res = $function($val['url']); $resWidth = $info[0]; $resHeight = $info[1]; //建立画板 ,缩放图片至指定尺寸 $canvas=imagecreatetruecolor($val['width'], $val['height']); imagefill($canvas, 0, 0, $color); //关键函数,参数(目标资源,源,目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h) imagecopyresampled($canvas, $res, 0, 0, 0, 0, $val['width'], $val['height'],$resWidth,$resHeight); $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']) - $val['width']:$val['left']; $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']) - $val['height']:$val['top']; //放置图像 imagecopymerge($imageRes,$canvas, $val['left'],$val['top'],$val['right'],$val['bottom'],$val['width'],$val['height'],$val['opacity']);//左,上,右,下,宽度,高度,透明度 } } //处理文字 if(!empty($config['text'])){ foreach ($config['text'] as $key => $val) { $val = array_merge($textDefault,$val); list($R,$G,$B) = explode(',', $val['fontColor']); $fontColor = imagecolorallocate($imageRes, $R, $G, $B); $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']):$val['left']; $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']):$val['top']; imagettftext($imageRes,$val['fontSize'],$val['angle'],$val['left'],$val['top'],$fontColor,$val['fontPath'],$val['text']); } } //生成图片 if(!empty($filename)){ $res = imagejpeg ($imageRes,$filename,90); //保存到本地 imagedestroy($imageRes); if(!$res) return false; return $filename; }else{ imagejpeg ($imageRes); //在浏览器上显示 imagedestroy($imageRes); } }
Usage example one: Generate with Poster of QR code
$config = array( 'image'=>array( array( 'url'=>'qrcode/qrcode.png', //二维码资源 'stream'=>0, 'left'=>116, 'top'=>-216, 'right'=>0, 'bottom'=>0, 'width'=>178, 'height'=>178, 'opacity'=>100 ) ), 'background'=>'bg/bg1.jpg' //背景图 ); $filename = 'bg/'.time().'.jpg'; //echo createPoster($config,$filename); echo createPoster($config);
##Usage example 2: Generate a QR code with image, nickname and QR code Poster
$config = array( 'text'=>array( array( 'text'=>'昵称', 'left'=>182, 'top'=>105, 'fontPath'=>'qrcode/simhei.ttf', //字体文件 'fontSize'=>18, //字号 'fontColor'=>'255,0,0', //字体颜色 'angle'=>0, ) ), 'image'=>array( array( 'url'=>'qrcode/qrcode.png', //图片资源路径 'left'=>130, 'top'=>-140, 'stream'=>0, //图片资源是否是字符串图像流 'right'=>0, 'bottom'=>0, 'width'=>150, 'height'=>150, 'opacity'=>100 ), array( 'url'=>'https://wx.qlogo.cn/mmopen/vi_32/DYAIOgq83eofD96opK97RXwM179G9IJytIgqXod8jH9icFf6Cia6sJ0fxeILLMLf0dVviaF3SnibxtrFaVO3c8Ria2w/0', 'left'=>120, 'top'=>70, 'right'=>0, 'stream'=>0, 'bottom'=>0, 'width'=>55, 'height'=>55, 'opacity'=>100 ), ), 'background'=>'qrcode/bjim.jpg', ); $filename = 'qrcode/'.time().'.jpg'; //echo createPoster($config,$filename); echo createPoster($config);
php to implement student management system
Use PHP to implement the function of packaging zip and downloading
The above is the detailed content of How to generate promotional posters with PHP. For more information, please follow other related articles on the PHP Chinese website!

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita

ToretrievedatafromaPHPsession,startthesessionwithsession_start()andaccessvariablesinthe$_SESSIONarray.Forexample:1)Startthesession:session_start().2)Retrievedata:$username=$_SESSION['username'];echo"Welcome,".$username;.Sessionsareserver-si

The steps to build an efficient shopping cart system using sessions include: 1) Understand the definition and function of the session. The session is a server-side storage mechanism used to maintain user status across requests; 2) Implement basic session management, such as adding products to the shopping cart; 3) Expand to advanced usage, supporting product quantity management and deletion; 4) Optimize performance and security, by persisting session data and using secure session identifiers.

The article explains how to create, implement, and use interfaces in PHP, focusing on their benefits for code organization and maintainability.

The article discusses the differences between crypt() and password_hash() in PHP for password hashing, focusing on their implementation, security, and suitability for modern web applications.

Article discusses preventing Cross-Site Scripting (XSS) in PHP through input validation, output encoding, and using tools like OWASP ESAPI and HTML Purifier.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

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

Hot Article

Hot Tools

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Notepad++7.3.1
Easy-to-use and free code editor
