This stuff is available all over the street, but I really don’t think there is a clear and complete article. I’ll write it down and use it as a memo.
date ()<br>Y: 年,四位数字<br>y: 年,两位数字<br>F: 月份,英文全名,如:"January"<br>m: 月份,两位数字,从"01"至"12"<br>n: 月份,两位数字,不补零;从"1"至"12"<br>M: 月份,3个英文字母;如:"Jan"<br>S: 字尾加英文序数,两个英文字母,如:"21th"<br>d: 几日,两位数字,若不足则补零;从"01"至"31"<br>j: 几日,不足不被零;从"1"至"31"<br>D: 星期几,3个英文字母,如:"Fri"<br>l: 星期几,英文全名,如:"Friday"<br>w: 数字型的星期几,从"0(星期天)"至"6(星期六)"<br>h: 12小时制的小时,从"01"至"12"<br>H: 24小时制的小时,从"00"至"23"<br>g: 12小时制的小时,不补零;从"1"至"12"<br>G: 24小时制的小时,不补零;从"0"至"23"<br>s: 秒;从"00"至"59"<br>a: "am"或是"pm"<br>A: "AM"或是"PM"<br>r: 表示RFC822日期(Tue, 06 Feb 2007 14:25:52 +0000)<br>c: ISO8601日期,日期格式为YYYY-MM-DD,用字母T来间隔日期和时间,时间格式为HH:MM:SS,时区使用格林威治标准时间(GMT)的偏差来表示。(2007-02-06T14:24:43+00:00)<br>I: 是否为夏令时<br>T: 服务器的时间区域设置<br>L: 是否为闰年<br>W: 一年中的星期数<br>t: 指定月份的天数,从"28"至"31"<br>U: 总秒数(时间戳)<br>z: 一年中的第几天;从"1"至"366"
The above introduces the parameters in the date function in php date in PHP, including the content of php date. I hope it will be helpful to friends who are interested in PHP tutorials.

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.


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