Program to find the number of days between two dates in PHP

Given two dates. The task is to find the number of days between the given dates.

Examples:

Input : date1 = "17-09-2018"
        date2 = "31-09-2018"
Output: Difference between two dates: 14 days 

Input : date1 = "2-05-2017"
        date2 = "25-12-2017"
Output: Difference between two dates: 237 Days

Note: The dates can be taken in any format. In the above example, the date is taken in dd-mm-yyyy format.

Method 1: In this method, first take two dates and get their differences. Below is the implementation of this method.

<?php 
  
// PHP code to find the number of days 
// between two given dates 
  
// Function to find the difference  
// between two dates. 
function dateDiffInDays($date1, $date2)  
{ 
    // Calculating the difference in timestamps 
    $diff = strtotime($date2) - strtotime($date1); 
      
    // 1 day = 24 hours 
    // 24 * 60 * 60 = 86400 seconds 
    return abs(round($diff / 86400)); 
} 
  
// Start date 
$date1 = "17-09-2018"; 
  
// End date 
$date2 = "31-09-2018"; 
  
// Function call to find date difference 
$dateDiff = dateDiffInDays($date1, $date2); 
  
// Display the result 
printf("Difference between two dates: "
   . $dateDiff . " Days "); 
?> 

Output:

Difference between two dates: 14 Days

Method 2 Using date_diff() Function: The date_diff() function is an inbuilt function in PHP which is used to calculate the difference between two dates. This function returns a DateInterval object on the success and returns FALSE on failure.

Example:

<?php 
  
// PHP code to find the number of days 
// between two given dates 
  
// Creates DateTime objects 
$datetime1 = date_create('17-09-2018'); 
$datetime2 = date_create('25-09-2018'); 
  
// Calculates the difference between DateTime objects 
$interval = date_diff($datetime1, $datetime2); 
  
// Display the result 
echo $interval->format('Difference between two dates: %R%a days'); 
?> 

Output:

Difference between two dates: +8 days

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