Create PHP Array Where Matching Keys have Some Value - php

Question

This is the first post from a PHP noob. My question relates to an HTML/PHP form which posts the following three types of data generated by a MySQL query:
ID (always posted via a hidden input field)
Mileage (only some entries may be completed, others might be left blank)
Vehicle Type (always posted via a hidden input field)
This data is all for one of three companies that are selected on the page preceding the data-posting page ie.
Step One: Choose company and year. Press submit.
Step Two: See results from MySQL query and enter in mileages where necessary. Press submit.
Step Three: (that's why I'm here)
I've stuffed this data into what I (probably mistakenly) believe is a multidimensional array called $idmilearray by using the following code:
if(isset($_POST['mileage'])) {
$mileagenumber = $_POST['mileage'];
}
if(isset($_POST['idnos'])) {
$idnumber = $_POST['idnos'];
}
if(isset($_POST['vehicle'])) {
$vehicletype = $_POST['vehicle'];
}
$idmilearray = array(
'ids' => $idnumber,
'mileage' => $mileagenumber,
'vtype' => $vehicletype
);
foreach($idmilearray as $inputs) {
$inputs = $idmilearray['ids'];
$inputs = $idmilearray['mileage'];
$inputs = $idmilearray['vtype'];
}
If I execute a print_r on the $idmilearray I get the following results:
Array
(
[ids] => Array
(
[0] => 35
[1] => 22
[2] => 32
[3] => 38
[4] => 36
[5] => 39
[6] => 16
[7] => 20
[8] => 48
[9] => 46
)
[mileage] => Array
(
[0] => 334
[1] => 56
[2] =>
[3] => 43
[4] =>
[5] =>
[6] =>
[7] =>
[8] => 11
[9] => 5
)
[vtype] => Array
(
[0] => 10T
[1] => 10T
[2] => 10T
[3] => Artic
[4] => 10T
[5] => Artic
[6] => Artic
[7] => 10T
[8] => Artic
[9] => 10T
)
What I would like to do is to create another array (the values of which I can use in later SQL queries) but only where the keys contain something in [ids][0], [mileage][0] and [vtype][0] and so on and so forth. I'd like to use [mileage] as the 'reference array'.
I've been playing around with array_intersect_key and array_diff_key but I've hit a big and rather a nasty wall. Can anyone help or give some pointers?
Thanks very much for your time.
Regards,
External.

Answer 1

You can use what you have to insert directly into mysql as follows:
foreach ( $idmilearray['mileage'] as $KEY => $VAL ) {
if ( empty($VAL) ) continue;
$query = "INSERT INTO `tableName` (id, mileage, vtype) VALUES ('{$idmilearray['ids'][$KEY]}', '$VAL', '{$idmilearray['vtype'][$KEY]}')";
}
Or if you really want to merge everything for further processing or whatever reason you can do it like so:
$NewArray = [];
foreach ( $idmilearray['mileage'] as $KEY => $VAL ) {
if ( empty($VAL) ) continue;
$NewArray[] = array('id' => $idmilearray['ids'][$KEY], 'mileage' => $VAL, 'vtype' => $idmilearray['vtype'][$KEY]);
}
Ofcourse there are many other possible ways to do this, but these are the easiest given what you currently have.

Answer 2

Just add another foreach, inside your existing foreach and fill your new array by checking the old array values with if (!empty($old_array)) {}
Example:
foreach($idmilearray as $inputs) {
$inputs = $idmilearray['ids'];
$inputs = $idmilearray['mileage']; // This is the one you want, right?
$inputs = $idmilearray['vtype'];
}
To do the job you need, it would be something like this:
$new_array = []; // Short array syntax (PHP 5.3+)
foreach($idmilearray as $inputs) {
$inputs = $idmilearray['ids'];
foreach($idmilearray['mileage'] as $mileage) {
if (!empty($mileage)) {
$new_array[] = $mileage;
}
}
$inputs = $idmilearray['vtype'];
}
Now you have new array ($new_array) filled only with the keys that links to existing values.
I hope it helps you.