php日期操作技巧小结,php操作技巧小结_PHP教程
php日期操作技巧小结,php操作技巧小结
本文实例总结了php日期操作技巧。分享给大家供大家参考,具体如下:
1、php将表单里面获取的日期格式转换成统一的格式
2015-9-9 都统一转换成 2015-09-09 这样在数据库都是统一的格式,方便以后查询
$year = "2015"; $month = "9"; $day = "09"; var_dump(checkdate($month,$day, $year));//月和日带有前导0都是符合格式的 if(checkdate($month,$day, $year)===false){ exit('error'); }; $unixtime = mktime(2,2,2,$month,$day,$year);//目的是交给php转换成月和日都带有前导0的格式统一的格式存储在数据库方便以后查询 var_dump(date("Y-m-d",$unixtime)); ////交给php转换成时间戳,然后反转回来
2、获取上一天的开始时间戳和结束时间戳
本来思路是:
先用date获取当天的年月日。单独获取。得到年是2015 月是9 日是28
然后减去1就可以了。但问题出来了。
如果今天是1号呢。减去1就变成0了。上个月可能是28天,也可能是30天。
这样子,先得到上一天的时间戳。让php自动去计算。
strtotime("-1 day"); //得到上一天的时间戳,现在是几点就得到上一天这个时间点的时间戳,用这种方式好处是解决了上面问题,php会自动去计算上个月多少天
<?php header("Content-type:text/html;charset=utf-8"); date_default_timezone_set("Asia/Shanghai");//设置时区 $last_day = strtotime("-1 day");//得到上一天的时间戳,现在是几点就得到上一天这个时间点的时间戳 //通过时间戳得到年月日,以便mktime使用 $year = date("Y",$last_day); $month = date("m",$last_day); $day = date("d",$last_day); $last_day_begin = mktime(0,0,0,$month,$day,$year);//昨天的一天开始的时间戳 $last_day_end = mktime(23,59,59,$month,$day,$year); echo '昨天开始时间戳:'; var_dump($last_day_begin); echo date('Y-m-d H:i:s',$last_day_begin); echo '<br />'; echo '昨天结束时间戳:'; var_dump($last_day_end); echo date('Y-m-d H:i:s',$last_day_end); echo '<br />'; echo ($last_day_end-$last_day_begin)/(60*60);//恰好24个小时
更多关于PHP相关内容感兴趣的读者可查看本站专题:《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《PHP数学运算技巧总结》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《PHP数组(Array)操作技巧大全》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《php正则表达式用法总结》、及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。

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

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

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
