Question

The system is for phone contract comparison. Originally we could filter the result by length, given in months. However we’ve opted to storing this as a timestamp of the end date of contract in the database.

The original PHP was as follows:

$min = min($_POST["length"])-6;
$max = max($_POST["length"]);
$query[] = "length BETWEEN $min AND $max";

In summary, here’s what we have at the moment:

1. In the database is stored the end-date of the contract (as a timestamp)

2. The post value contains how many months from now it should last (eg. 7-12 months would have a value of 7)

How can we change the PHP calculations to get the between values from the database?

Many thanks, Nick.

Answer 1

<?php
    $diff = 7;     // This may be set to $_POST['length']
    $max = date("Y-m-d");
    $min = date("Y-m-d", strtotime("$diff months ago"));
    $query[] = "DATE(`timestamp_field`) BETWEEN CAST($min AS DATE) AND CAST($max AS DATE)";
?>