Alejandro Suarez Alejandro Suarez - 24 days ago 4
MySQL Question

MYSQL-PHP Get value of a specific cell(field) and use it in PHP IF statement

im hoping anyone can help with this issue. Heads up im in the process of learning both PHP and MySQL so please bear with me. I have the following table:


ID whid securitybatch radionumber userbatch status dateofentry
1 XXX 123456 1 5555555 Available 11/10/2016 9:20
2 XXX 123456 7 1234567 Available 11/10/2016 16:50
3 XXX 123456 6 6666666 Available 11/11/2016 7:43
4 XXX 123456 3 2222222 Deployed 11/11/2016 19:52
5 XXX 123456 4 1234567 ***Deployed*** 11/11/2016 20:03
6 XXX 123456 6 6666666 Available 11/11/2016 21:43
7 XXX 123456 2 2222222 Deployed 11/11/2016 21:52


Im trying the get the highlighted value and use it in an IF statement, the issue is my specific requirements.

The user 1234567 has two entries on the table and eventually a lot more, i want to get the value of the status column of the latest dated entry for that user, being the one that is selected, if that makes sense...ive been trying and researching but its beating me up...

$query = "SELECT status FROM radiodata WHERE userbatch='$user' AND MAX(dateofentry)";
$result = mysqli_query($dbc, $query);


So i would love to get the value 'Deployed' a string i suppose and use it as follows:

if($result === 'Deployed') {
echo 'Not returned';
} else {
echo 'Returned';
}


Thanks in advance, any ideas/solutions are welcome.

Cheers

Answer

That query in it's current form is invalid and will lead to a syntax error.

$query = "SELECT status FROM radiodata WHERE userbatch='$user' ORDER BY dateofentry DESC LIMIT 1";
$result = mysqli_query($dbc, $query);     

You really shouldn't be using string concatenation like this, but let's leave that aside for now. This query will now return you a single row result.

Having done that you still can't compare it to deployed in that manner

$row = mysqli_fetch_array($result);
if ($row['status'] == 'Deployed') {

}
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