


PHP ajax upload image example code without refresh, _PHP tutorial
php ajax upload image code example without refresh,
This article shares the example code of php combined with ajax to upload image without refresh, share it with everyone, I hope you can join the editor Learn and make progress together.
1. Import files
<!--图片上传begin--> <script type="text/javascript" src="/js/jquery.form.js"></script> <script type="text/javascript" src="/js/uploadImg.js"></script> <link href="/css/uploadImg.css" rel="stylesheet" type="text/css" /> <!--图片上传end-->
2.html part
<div class="upimg"> <input name="icon" type="text" class="imgsrc" value="<!--{$contents.icon}-->" /> <div class="showimg"> <!--{if $contents.icon}--> <img src="/static/imghwm/default1.png" data-src="<!--{$contents.icon}-- alt="PHP ajax upload image example code without refresh, _PHP tutorial" >" class="lazy" height="120px"> <!--{/if}--> </div> <div class="btn" style="height:20px;"> <span>添加图片</span> <input class="fileupload" type="file" name="pic[]"> </div> </div>
3. Add a form to fileupload
/*图片上传*/ $(".fileupload").wrap("<form action='/bookstore/book/uploadpic' method='post' enctype='multipart/form-data'></form>"); //函数处理
4.ajax file upload
jQuery(function ($) { $(".fileupload").change(function(){ //选择文件 if ('' === $(this).val()) return; var upimg = $(this).parent().parent().parent(); var showimg = upimg.find('.showimg'); var btn = upimg.find('.btn span'); var imgsrc = upimg.find('.imgsrc'); $(this).parent().ajaxSubmit({ //dataType: 'json', //数据格式为json beforeSend: function() { //开始上传 showimg.empty(); //清空显示的图片 imgsrc.val(""); btn.html("上传中..."); //上传按钮显示上传中 }, uploadProgress: function(event, position, total, percentComplete) { }, success: function(data) { //成功 //获得后台返回的json数据,显示文件名,大小,以及删除按钮 var img = data; //显示上传后的图片 imgsrc.val(""); imgsrc.val(img); showimg.html("<img src="/static/imghwm/default1.png" data-src="http://files.jb51.net/file_images/article/201511/20151117145516729.png?20151017145526?x-oss-process=image/resize,p_40" class="lazy" style="max-width:90%" style="max-width:90%"+img+"' alt="PHP ajax upload image example code without refresh, _PHP tutorial" >"); btn.html("上传成功"); //上传按钮还原 }, error:function(xhr){ //上传失败 btn.html("上传失败"); } }); }); });
5. Processing in the background
public function uploadpicAction(){ //图片上传和显示 $data = ""; $src = $this->uploadFiles2($imgpath = "/upload/book" ,$filesname = "pic"); isset($src[0]['src']) && $src[0]['src'] ? $data = $this->concaturl($src[0]['src']) : null; echo $data; }
6. Hand the returned data to the front end for some processing.
Then submit it to the backend database.
I hope this article will help you learn PHP programming.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7


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