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Human Readable Printing Of How Long Ago A UNIX Timestamp Was

The best way I can explain the application of this function is this is to benefit the USER when reading back a time needs to be absolutely clear to anybody reading in a very friendly format.
2022-07-18T:00:00:00+00:00 July 18 2022 00:00:00

<?php
function timeAgo($stamp,$chk = "") {
	if($chk==""){ $chk = time(); }
	if($stamp>$chk) { $diff = $stamp-$chk; } else { $diff = $chk-$stamp; }
	switch($diff) {
		case ($diff>31556926): { 
			$years = floor($diff/31556926);
			$ago = $years." year(s) ago";
			if($years==0){ $ago = "Now"; }	
			break;
		}
		case ($diff>2629743): { 
			$months = floor($diff/2629743);
			$ago = $months." month(s) ago";
			break; 
		}
		case ($diff>604800): { 
			$weeks = floor($diff/604800);
			$ago = $weeks." week(s) ago";
			break; 
		}
		case ($diff>86400): { 
			$days = floor($diff/86400);
			$ago = $days." day(s) ago";
			break;
		}
		case ($diff>3400): { 
			$hours = floor($diff/3400);
			$ago = $hours. " hour(s) ago";
			break; 
		}
		case ($diff>60): { 
			$minutes = floor($diff/60);
			$ago = $minutes. " minute(s) ago";
			break; 
		}
		case (($diff<60)&&($diff>1)): { 
			$ago = $diff. " second(s) ago"; 
			break; 
		}
		case ($diff<=1): {
			$ago = "Now";
			break;
		}
		case ($diff==0): { 
			$ago = "Now";
			break; 
		}
	}
	return $ago;
}
?>

This PHP function will allow you to print how long a timestamp was in a human readable format. You can also compare it against another past time by using the 2nd parameter provided. This is useful for presenting last login to the user, a comment system's posts, etc.

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