php code compare times code example

Example 1: date diff php

$datetime1 	= new DateTime('2020-10-11 16:52:52');
$datetime2 	= new DateTime('2020-10-13 16:52:52');
$interval 	= $datetime1->diff($datetime2);

echo $interval->format('%a days');

Example 2: string compare in php

//In php to compare two string we can use strcmp() function
Syntax
strcmp(string1,string2);

//If both string is same then it will return 0
<?php
echo strcmp("Hello world!","Hello world!");
?>