trolley/dbcleaner.php

<?php
	//Description: When activated this script will remove any old entries from db.txt.
	
	date_default_timezone_set('America/Puerto_Rico'); //Changes the default timezone of the script to Puerto Rico. 
	$time = date("h:i:s",strtotime('-15 seconds')); //Stores the current time minus the a certain amount of time.
	$db = file('/var/www/html/db.txt'); //Access db.txt and stores each line into an array. 
	$fsize = count($db); //Get the size of the db array.
	$change = False; //Boolian used to indicate if the file had to be changed. 
	for($i = 0;$i < $fsize; $i++) //Loop that will iterate through the db array.
	{
		$decode =  json_decode($db[$i]); //Gets the jsons stored in db and decodes them. 
		if(date("h:i:s",strtotime($decode->inTime)) < date("h:i:s",strtotime($time))) //Compares if the inTime of stored in each json is less than the one in the time variable. 
		{
			unset($db[$i]);//Removes the json in db[i].
			$change = True;//Indicates that their was change in db.
		}
	}
	if ($change == True)//Check if there was a change in db.
	{
		file_put_contents("/var/www/html/db.txt", $db);//Rewrites the db.txt with the contents of db.
	}

?>