dateFormat function

The dateFormat function is one that I love. Throw any kind of date format at it, request any format back, it just works.

Examples of usage:

$humanDisplay = dateFormat('2013-08-22 17:52:33','human');
$tomorrow = dateFormat('now + 1 day','human');
$mysql_date = dateFormat('8/30/2013','mysqldate');
$mysql_datetime = dateFormat('8/30/2013 5:00 PM','mysql');
$unix_timestamp = dateFormat('8/30/2013 5:00 PM','php');

if(dateFormat('now','php')>dateFormat($someVariable,'php')) {
// do stuff
}

The dateFormat function (and related supporting functions):

function parseTimezone($inputDate) {
	if(	   strpos($inputDate,'Eastern')>0
		|| strpos($inputDate,'Central')>0
		|| strpos($inputDate,'Mountain')>0
		|| strpos($inputDate,'Pacific')>0
		|| strpos($inputDate,'Alaska')>0
		|| strpos($inputDate,'Hawaii-Aleutian')>0
		|| strpos($inputDate,'Arizona')>0 
		|| strpos($inputDate,'America/')>0 
		|| strpos($inputDate,'Pacific/')>0 
		|| strpos($inputDate,'GMT')>0
		) {
		$parts = explode(' ',$inputDate);
		$timezoneName = array_pop($parts);
		$inputDate = implode(' ',$parts);
	}
	return $inputDate;
}


function isValidDate($inputDate) {
	if($inputDate=="01/01/0001"
		|| $inputDate=="01/01/01"
		|| $inputDate=="0001-01-01"
		|| $inputDate=="0000-01-01"
		|| $inputDate=="0000-00-00"
		|| $inputDate==""
		|| strlen($inputDate)<3
		) {
		return false;
		// don't increase the required length by more than 3 so "now" doesn't get cut
	}
	
	$inputDate = parseTimezone($inputDate);
	
	
	if(is_numeric($inputDate) && $inputDate>100000000) {
		// 100000000 = 1973-03-03 01:46:40
		// this should catch all integers that are errantly caught as dates
		$phpTime = $inputDate;
	} elseif($inputDate!='' && ( strpos(strtolower($inputDate),'now')!==false 
									|| strpos($inputDate,'/') 
									|| strpos($inputDate,'-')
									|| strpos($inputDate,'day')
									|| strpos($inputDate,'week')
									|| strpos($inputDate,'month')
									|| strpos($inputDate,'year')
									) ) {
		$phpTime = strtotime($inputDate);
	} else {
		return false;
	}
	
	if($phpTime==-62135568000) { // 0000-00-00
		return false;
	}
	if($phpTime==NULL) {
		return false;
	}
	$month = date('n',$phpTime);
	$day = date('j',$phpTime);
	$year = date('Y',$phpTime);
	
	return checkdate($month,$day,$year);
}


function dateFormat($inputDate, $format=NULL, $params=array()) {
	if(!isValidDate($inputDate)) {
		$inputDate=NULL;
	}
	if(strtolower($inputDate)=="now" || strtolower($inputDate)=="now()") {
		$inputDate = "now";
	}
	if($format==NULL) {
		$format="human";
	}
	
	$inputDate = parseTimezone($inputDate);
	
	if(is_numeric($inputDate) && (int)$inputDate==$inputDate) {
		$phpTime = $inputDate;
	} elseif($inputDate!='') {
		$phpTime = strtotime($inputDate);
	}
	
	if($phpTime) {
		if($format=="human") {
			return date("m/d/Y",$phpTime);
		} else if(strtolower($format)=="mysql") {
			return date("Y-m-d H:i:s",$phpTime);
		} else if(strtolower($format)=="mysqldate" || ($format=="%Q") ) {
			return date("Y-m-d",$phpTime);
		} else if(strtolower($format)=="mysqltime" || ($format=="%T") ) {
			return date("H:i:s",$phpTime);
		} else if(strtolower($format)=="solr") {
			return gmdate('Y-m-d\TH:i:s\Z',$phpTime);
		} else if(strtolower($format)=="php") {
			return $phpTime;
		} else if(strtolower($format)=="human datetime") {
			return date("n/j/y g:i A",$phpTime);

		} else if($format!='') {
			return date($format,$phpTime);
		}
	} else {
		return NULL;
	}
}

Michael Berding September 13th, 2013

Posted In: Functions