PHP output time difference function code_PHP tutorial
PHP output time difference function
date_default_timezone_set('PRC'); //Default time zone
echo "Today:",date("Y-m-d",time()),"
";
echo "Today:",date("Y-m-d",strtotime("18 june 2008") ),"
";
echo "Yesterday:", date("Y-m-d",strtotime("-1 day")), "
";
echo "Tomorrow:", date("Y-m-d",strtotime("+1 day")), "
";
echo "One week later:",date("Y-m-d",strtotime("+1 week")), "
";
echo "One week, two days, four hours and two seconds later:",date("Y-m-d G:H:s",strtotime("+1 week 2 days, 4 hours 2 seconds")), "
";
echo "Next Thursday:", date("Y-m-d",strtotime("next Thursday")), "
";
echo "Last Monday:" .date("Y-m-d",strtotime("last Monday"))."
";
echo "One month ago:".date("Y-m-d",strtotime("last month"))."
";
echo "One month later:".date("Y-m-d",strtotime("+1 month"))."
";
echo "Ten years later:" .date("Y-m-d",strtotime("+10 year"))."
";
?>
When learning PHP, it is often used to get A date in a certain period of time before or after now. Now that it has been collected, you can also expand and enrich
//Get the day of the week (1-7)
function GetWeek($times)
{
$res = date('w', strtotime($times));
if($res==0)
$res=7;
return $res;
}
//Get the time of the day
function GetTime($times)
{
$res = date('H:i ', strtotime($times));
return $res;
}
//Get the time in several months now
function GetMonth($Month,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime("-$Month months"));
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime("+$Month months"));
return $res;
}
//Get the current time
function GetCurrentDateTime()
{
$res=date("Y-m-d H:i:s",time());
return $res;
}
//Get the time before or after the current time interval in hours
function GetDiffHours($hours,$type='l')
{
if(!strcmp($type ,'b'))
$res=date("Y-m-d H:i:s",strtotime("-$hours hour"));
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime("+$hours hour"));
return $res;
}
//A few minutes before or after time
function GetDiffMinute($Minute,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H: i:s",strtotime("-$Minute minute"));
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime ("+$Minute minute"));
return $res;
}
//The time before or after the interval in seconds
function GetDiffSec($sec,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime("-$sec second"));
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime("+$sec second"));
return $res;
}
//Time before or after a few weeks
function GetDiffWeek($Week,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime("-$Week week"));
if(!strcmp($type,'l'))
$res= date("Y-m-d H:i:s",strtotime("+$Week week"));
return $res; ($days,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime( "-$days day"));
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime("+$days day" ); if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime("-$year year"));
if(!strcmp($ type,'l'))
$res=date("Y-m-d H:i:s",strtotime("+$year year"));
return $res;
}

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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