echo "今天:".date("Y-m-d")."
";
echo "昨天:".date("Y-m-d",strtotime("-1 day")), "
";
echo "明天:".date("Y-m-d",strtotime("+1 day")). "
";
echo "一周后:".date("Y-m-d",strtotime("+1 week")). "
";
echo "一周零两天四小时两秒后:".date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")). "
";
echo "下个星期四:".date("Y-m-d",strtotime("next Thursday")). "
";
echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."
";
echo "一个月前:".date("Y-m-d",strtotime("last month"))."
";
echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."
";
echo "十年后:".date("Y-m-d",strtotime("+10 year"))."
";
strtotime()函数的作用是将日期时间描述解析为 Unix 时间戳
int strtotime ( string time [, int now] )
PHP星期几获取代码:
date("l");
//data就可以获取英文的星期比如Sunday
date("w");
//这个可以获取数字星期比如123,注意0是星期日
获取中文星期可以这样
$weekarray=array("日","一","二","三","四","五","六");
echo "星期".$weekarray[date("w")];
获取指定日期是:
[code]
$weekarray=array("日","一","二","三","四","五","六");
echo "星期".$weekarray[date("w","2011-11-11")];
因为date函数非常强大,他完全可以胜任一切这样的工作我附个手册里的表吧
a - "am" 或是 "pm"
A - "AM" 或是 "PM"
d - 几日,二位数字,若不足二位则前面补零; 如: "01" 至 "31"
D - 星期几,三个英文字母; 如: "Fri"
F - 月份,英文全名; 如: "January"
h - 12 小时制的小时; 如: "01" 至 "12"
H - 24 小时制的小时; 如: "00" 至 "23"
g - 12 小时制的小时,不足二位不补零; 如: "1" 至 12"
G - 24 小时制的小时,不足二位不补零; 如: "0" 至 "23"
i - 分钟; 如: "00" 至 "59"
j - 几日,二位数字,若不足二位不补零; 如: "1" 至 "31"
l - 星期几,英文全名; 如: "Friday"
m - 月份,二位数字,若不足二位则在前面补零; 如: "01" 至 "12"
n - 月份,二位数字,若不足二位则不补零; 如: "1" 至 "12"
M - 月份,三个英文字母; 如: "Jan"
s - 秒; 如: "00" 至 "59"
S - 字尾加英文序数,二个英文字母; 如: "th","nd"
t - 指定月份的天数; 如: "28" 至 "31"
U - 总秒数
w - 数字型的星期几,如: "0" (星期日) 至 "6" (星期六)
Y - 年,四位数字; 如: "1999"
y - 年,二位数字; 如: "99"
z - 一年中的第几天; 如: "0" 至 "365"

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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