MySQL sql query LIKE to get current opening hours - php

Question

So, in my mysql database I am storing days and hours open in one field, called days, the data is stored in the following format:
[Monday:9:17[Tuesday:9:17[Wednesday:10:18[
As you may've guessed, it goes: [Day:From:Till and brackets are just seperatars for PHP to distinguish how many days are there.
I've been thinking all day what query would be but I could not figure out, so basically I need to get current date and time using PHP:
date(l); // Day in full text representation.
date(G); // current hour in 24 hour format.
So basically I need a query which in simple english would sound like:
SELECT all FROM businessdetails WHERE column date CONTAINS [current date] and :#:# numbers to be less than current hour and greater than current hour.
Help? My brain is melting by now.

Answer 1

So honestly the best thing to do is to normalize your database so you can do better queries. BUT I love to see if I can solve impossible situations so here is what you can do!
This will check all the business that are open on Tuesday at 11am
SELECT * FROM `businessdetails` WHERE `date` REGEXP 'Tuesday:(0|1|2|3|4|5|6|7|8|9|10|11):(11|12|13|14|15|16|17|18|19|20|21|22|23)[^0-9]'
(Funny thing I've found I can't seem to escape the [ in the column so I had to make sure the Regex doesn't have any extra digits at the end or it may erroneously match 2 and 20 or something.)
Here's how you can generate that REGEXP string via PHP:
<?php
$regexp = date('l') . ':(' . join('|', range(0, date('G'))) . '):(' . join('|', range(date('G'), 23)) . ')[^0-9]';
DISCLAIMER I don't actually recommend doing this but I thought it was clever and wanted to share since it directly answers your question.

Answer 2

EDIT
Just noticed you changed your answer. below may not apply anymore, but I'll leave it for future reference...
I would suggest having a separate child table for this.
STORES
auto increment ID
|
| the store name the store description etc..
| / / /
.--------------------------------------------------.
| id | name | description | etc |
|--------------------------------------------------|
| 1 | mary's kitchen | a fancy restaurant | etc |
| 2 | willow creek inn | we serve breakfast | etc |
'--------------------------------------------------'
STORE_HOURS
auto increment ID
| The STORES.id
| / the day (0-SUN, 6-SAT)
| _________/ / the 24h time OPEN (HH:MM:SS *TIME*)
| / _________/ ____/ the 24h time CLOSE (HH:MM:SS *TIME*)
| / / / /
.----------------------------------------------.
| id | store_id | day | time_open | time_close |
| 1 | 1 | 1 | 08:30:00 | 20:00:00 |
| 2 | 1 | 2 | 08:30:00 | 20:00:00 |
| 3 | 1 | 3 | 10:30:00 | 20:00:00 |
| 4 | 1 | 4 | 11:00:00 | 20:00:00 |
| 5 | 1 | 5 | 08:30:00 | 22:30:00 |
'----------------------------------------------'
Now, depending on what you want to display, you could query the table:
SELECT
stores.name AS store_name,
stores.description AS store_description,
store_hours.day AS store_hours_day,
TIME(store_hours.time_open) AS store_open,
TIME(store_hours.time_close) AS store_close
FROM
stores
JOIN
store_hours
ON
store_hours.store_id = stores.id
Result: http://sqlfiddle.com/#!2/e6872/8/0
With this table structure and relationship, you can then create granular queries without too much effort.

Answer 3

So this might be a hell of a response, but here is one way to do it... (Although I'm sure there must be more significantly better ways:
$day = date(l); // Day in full text representation.
$time = date(G); // current hour in 24 hour format.
$sql = "SELECT businessID FROM (SELECT SUBSTRING_INDEX(t_time,':',1) as start, SUBSTRING_INDEX(LEFT(t_time,POSITION('[' IN t_time) - 1), ':',-1) as end,businessID from (SELECT SUBSTRING_INDEX(SUBSTR(`column_date`,POSITION('$day' IN `column_date`) + LENGTH('" . $day . "') + 1),':',2) as t_time, businessID from `businessdetails ` where `column_date` like '%$day%') as t_table_1) as t_table_2 where start >= $time && end <= $time";
Hopefully that works =)
PS If you need help there are all these string functions you could use:
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html