This article mainly introduces the usage of common form validation classes in PHP. It analyzes common PHP validation techniques for form elements with examples. Friends in need can refer to the following.
The examples in this article describe the usage of common PHP form validation classes. Share it with everyone for your reference. The details are as follows:
<?php /** * 页面作用:常用表单验证类 * 作 者:欣然随风 * QQ:276624915 */ class class_post { //验证是否为指定长度的字母/数字组合 function fun_text1($num1,$num2,$str) { Return (preg_match("/^[a-zA-Z0-9]{".$num1.",".$num2."}$/",$str))?true:false; } //验证是否为指定长度数字 function fun_text2($num1,$num2,$str) { return (preg_match("/^[0-9]{".$num1.",".$num2."}$/i",$str))?true:false; } //验证是否为指定长度汉字 function fun_font($num1,$num2,$str) { // preg_match("/^[\xa0-\xff]{1,4}$/", $string); return (preg_match("/^([\x81-\xfe][\x40-\xfe]){".$num1.",".$num2."}$/",$str))?true:false; } //验证身份证号码 function fun_status($str) { return (preg_match('/(^([\d]{15}|[\d]{18}|[\d]{17}x)$)/',$str))?true:false; } //验证邮件地址 function fun_email($str){ return (preg_match('/^[_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,4}$/',$str))?true:false; } //验证电话号码 function fun_phone($str) { return (preg_match("/^((\(\d{3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}$/",$str))?true:false; } //验证邮编 function fun_zip($str) { return (preg_match("/^[1-9]\d{5}$/",$str))?true:false; } //验证url地址 function fun_url($str) { return (preg_match("/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/",$str))?true:false; } // 数据入库 转义 特殊字符 传入值可为字符串 或 一维数组 function data_join(&$data) { if(get_magic_quotes_gpc() == false) { if (is_array($data)) { foreach ($data as $k => $v) { $data[$k] = addslashes($v); } } else { $data = addslashes($data); } } Return $data; } // 数据出库 还原 特殊字符 传入值可为字符串 或 一/二维数组 function data_revert(&$data) { if (is_array($data)) { foreach ($data as $k1 => $v1) { if (is_array($v1)) { foreach ($v1 as $k2 => $v2) { $data[$k1][$k2] = stripslashes($v2); } } else { $data[$k1] = stripslashes($v1); } } } else { $data = stripslashes($data); } Return $data; } // 数据显示 还原 数据格式 主要用于内容输出 传入值可为字符串 或 一/二维数组 // 执行此方法前应先data_revert(),表单内容无须此还原 function data_show(&$data) { if (is_array($data)) { foreach ($data as $k1 => $v1) { if (is_array($v1)) { foreach ($v1 as $k2 => $v2) { $data[$k1][$k2]=nl2br(htmlspecialchars($data[$k1][$k2])); $data[$k1][$k2]=str_replace(" "," ",$data[$k1][$k2]); $data[$k1][$k2]=str_replace("\n","<br>\n",$data[$k1][$k2]); } } else { $data[$k1]=nl2br(htmlspecialchars($data[$k1])); $data[$k1]=str_replace(" "," ",$data[$k1]); $data[$k1]=str_replace("\n","<br>\n",$data[$k1]); } } } else { $data=nl2br(htmlspecialchars($data)); $data=str_replace(" "," ",$data); $data=str_replace("\n","<br>\n",$data); } Return $data; } } ?>
Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.
Related recommendations:
php methods for recursive operations on files
How to use php Remote image localization
PHP method of accepting files and getting suffix names
The above is the detailed content of Usage examples of common php form validation classes_php skills. For more information, please follow other related articles on the PHP Chinese website!

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.


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version
Useful JavaScript development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.