检查数组中具有先前值的数组

Question

I have an time array and the frequency of reading is 5 seconds

I want to check if the frequency of reading is 5 second between every element of

array

My code

$freq_of_reading = 5;
$res_arr = array(
    0 => array("13:53:45"),
    1 => array("13:53:50"),
    2 => array("13:53:55"),
    3 => array("13:54:00"),
    4 => array("13:54:05"),
    5 => array("13:54:10"),
    6 => array("13:54:15"),
    7 => array("13:54:20"),
    8 => array("13:54:25"),
    9 => array("13:54:30"),
);


try {
    $u = 0;
    foreach ($res_arr as $key => $item) {
        // if(strtotime($item))
        //Logic here 
    }
} catch (Exception $e) {
    echo $exp = $e->getMessage();
}

Answer 1

try this code

$count = count($res_arr);
for($i=0;$i<$count$i++)
    {
        $number = intval(substr($res_arr[$i], -2));

        $number1 = substr(($res_arr[$i+1], -2));
        if(($number1-$number) == 5)
        {
          echo "true";
        }

    }