php - why the day not equal to 24 hours timezone set to los angeles? -

-

background: our server php set timezone america/los_angeles

at work, found piece of code

$a = 1457856000; $b = $a + 24*3600-1;    var_dump(date('y-m-d h:i:s', $a)); var_dump(date('y-m-d h:i:s', $b));

which output:

string(19) "2016-03-13 00:00:00"  string(19) "2016-03-14 00:59:59"

quite strange, when code follow:

    date_default_timezone_set('etc/gmt+8');      $a = 1457856000;     $b = $a + 24*3600-1;        var_dump(date('y-m-d h:i:s', $a));     var_dump(date('y-m-d h:i:s', $b));

it output:

string(19) "2016-03-13 00:00:00" string(19) "2016-03-13 23:59:59"

could explain why happened?

take @ output of 

<?php date_default_timezone_set ('america/los_angeles'); $a = 1457856000; echo date('y-m-d h:i:s', $a), "\r\n\r\n";  for($i=0; $i<25; $i++) {     $b = $a + ($i*3600)-1;     echo date('y-m-d h:i:s', $b), "\r\n"; }

and marvel @ weirdness of daylight saving time.

2016-03-13 00:59:59 2016-03-13 01:59:59 2016-03-13 03:59:59 <- , here why tired day long next sunday  2016-03-13 04:59:59

edit: "and i'm wondering if there's native php function or approach make convenient format date without worrying summer time adjustments?"
yes, there is, see http://docs.php.net/datetime

<?php date_default_timezone_set('america/los_angeles'); $a = new datetime('2016-03-13 00:00:00'); $b = datetimeimmutable::createfrommutable($a)->modify('1 day'); $step = new dateinterval('pt1h');  while( $a <= $b ) {     echo $a->format('y-m-d h:i:s'), "\r\n";     $a->add($step); }

prints

2016-03-13 00:00:00 2016-03-13 01:00:00 2016-03-13 03:00:00 2016-03-13 04:00:00 2016-03-13 05:00:00 2016-03-13 06:00:00 2016-03-13 07:00:00 2016-03-13 08:00:00 2016-03-13 09:00:00 2016-03-13 10:00:00 2016-03-13 11:00:00 2016-03-13 12:00:00 2016-03-13 13:00:00 2016-03-13 14:00:00 2016-03-13 15:00:00 2016-03-13 16:00:00 2016-03-13 17:00:00 2016-03-13 18:00:00 2016-03-13 19:00:00 2016-03-13 20:00:00 2016-03-13 21:00:00 2016-03-13 22:00:00 2016-03-13 23:00:00 2016-03-14 00:00:00

and 

date_default_timezone_set('america/los_angeles'); $a = new datetime('2016-03-13 00:00:00'); $a->modify('+1 day -1 second'); echo $a->format('y-m-d h:i:s'), "\r\n";

prints 2016-03-13 23:59:59


Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

reactjs - React router and this.props.children - how to pass state to this.props.children -

-
i'm using react-router first time , don't know how think in yet. here's how i'm loading components in nested routes. entry point .js reactdom.render( <router history={hashhistory} > <route path="/" component={app}> <route path="models" component={content}> </route> </router>, document.getelementbyid('app') ); app.js render: function() { return ( <div> <header /> {this.props.children} </div> ); } so child of app content component sent in. i'm using flux , app.js has state , listens changes, don't know how pass state down this.props.children. before using react-router app.js defines children explicitly, passing state natural don't see how now. using couple of react helper methods can add state, props , whatever else this.props.children render: function() { var children = react.ch...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more