目前我知道的方法有两种,一种是使用PHP的创始人 Rasmus Lerdorf 写的APC扩展模块来实现(http://pecl.php.net/package/apc),另外一种方法是使用PECL扩展模块uploadprogress实现(http://pecl.php.net/package/uploadprogress) 我这里举两个分别实现的例子供参考,更灵活的应用根据自己需要来修改。
APC实现方法:
安装APC,参照官方文档安装,可以使用PECL模块安装方法快速简捷,这里不说明
配置php.ini,设置参数 apc.rfc1867=1 ,使APC支持上传进度条功能,在APC源码说明文档里面有说明
代码范例:
if ($_SERVER['REQUEST_METHOD'] == ‘POST‘) { //上传请求 $status = apc_fetch(‘upload_‘ . $_POST['APC_UPLOAD_PROGRESS']); $status['done'] = 1; echo json_encode($status); //输出给用户端页面里的ajax调用,相关文档请自己寻找 exit; } elseif (isset($_GET['progress_key'])) { //读取上传进度 $status = apc_fetch(‘upload_‘.$_GET['progress_key']); echo json_encode($status); exit; } else { //其他代码,比如上传表单等 } |
uploadprogress 模块实现方法:
使用PECL模块安装方法安装该模块
php.ini里面设置 uploadprogress.file.filename_template = “/tmp/upd_%s.txt”
代码范例:
if($_SERVER['REQUEST_METHOD']==‘POST‘) { if (is_uploaded_file($_FILES['upfile']['tmp_name'])) { $upload_dir = ‘your_path/‘; $ext = strrchr($_FILES['video']['name'], ‘.‘); $sessid = $_POST['UPLOAD_IDENTIFIER'] ; $tmpfile = $upload_dir . $sessid; $sessfile = $upload_dir . $sessid .$ext; if (move_uploaded_file($_FILES['upfile']['tmp_name'],$tmpfile)) { //上传成功 } else { //上传失败 } else { //上传错误 } elseif (!empty($_GET['sessid'])) { header(“Expires: Mon, 26 Jul 1997 05:00:00 GMT“); header(“Last-Modified: “ . gmdate(“D, d M Y H:i:s“) . “ GMT“); header(“Cache-Control: no-store, no-cache, must-revalidate“); header(“Cache-Control: post-check=0, pre-check=0“, false); header(“Pragma: no-cache“); header(“Content-Type:text/html;charset=UTF-8“); $unique_id = $_GET['sessid']; $uploadvalues = uploadprogress_get_info($unique_id); if (is_array($uploadvalues)) { echo json_encode($uploadvalues); } else { //读取进度失败,另外处理逻辑 } } else { //显示上传表单 } |

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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