medium between Identifying Wechat Data API response and storage

wechatDataAPIstorage.php

<?php
/*
  composer requires:
  "require": {
        "nesbot/carbon": "^1.22"
    }
*/

require __DIR__ . '/vendor/autoload.php';

/*sample response in array*/
$response = [ 
    [ 
        "ref_date"=> "2014-12-07", 
        "user_source"=> 0, 
        "new_user"=> 0, 
        "cancel_user"=> 0
    ],
    [ 
        "ref_date"=> "2014-12-07", 
        "user_source"=> 1, 
        "new_user"=> 1, 
        "cancel_user"=> 1
    ],
    [ 
        "ref_date"=> "2014-12-07", 
        "user_source"=> 2, 
        "new_user"=> 2, 
        "cancel_user"=> 2
    ],
    [ 
        "ref_date"=> "2014-12-08", 
        "user_source"=> 0, 
        "new_user"=> 0, 
        "cancel_user"=> 0
    ],
    [ 
        "ref_date"=> "2014-12-10", 
        "user_source"=> 0, 
        "new_user"=> 0, 
        "cancel_user"=> 0
    ],	
];

/*day range*/
$from='2014-12-06';
$to='2014-12-12';

$start = new Carbon\Carbon($from);
$end = new Carbon\Carbon($to);

/*index for loop through the response array*/
$index = 0;

/*reverse the response for array pop*/
$reverse = array_reverse($response);
$current = $start->copy();

/*simulate a database*/
$results = [];

/*loop through all the response requested*/
while($current->between($start,$end)){
	$data = array_pop($reverse);
	/*check if any response data left*/
	if ($data) {

    /*when the first date of the response does not match the current date*/
		while ($data['ref_date']!==$current->toDateString()) {
			/*check if the entry for current date already exist*/
			if(!in_array($current->toDateString(), $results)){
        /*insert the data if not exist*/
				array_push($results, $current->toDateString());
				echo 'while loop no data for '. $current->toDateString();
				echo '<br>';
			}
      /*add one day to the current date*/
			$current->addDay();
		}
    
    /*store the match data*/
		array_push($results, $current->toDateString());
		echo 'store data for '. $data['ref_date'];
		echo 'cancel_user:'. $data['cancel_user'];
		echo '<br>';
		
	}
	else{
		/*check if the entry of the data already exist*/
		if(!in_array($current->toDateString(), $results)){
			array_push($results, $current->toDateString());
			echo 'null no data for '. $current->toDateString();
		}
		$current->addDay();
	}
	echo '<br>';
}

/* output
while loop no data for 2014-12-06
store data for 2014-12-07cancel_user:0

store data for 2014-12-07cancel_user:1

store data for 2014-12-07cancel_user:2

store data for 2014-12-08cancel_user:0

while loop no data for 2014-12-09
store data for 2014-12-10cancel_user:0


null no data for 2014-12-11
null no data for 2014-12-12
*/