Combining two arrays PHP - php

Question

I'm busy with sorting the structure of a menu in my application. Once the menu is reorderd by the user, the values (say; Menu item 1, Menu item 2, etc) are still in the same place.
Now I have two arrays, one that holds the way they are sorted (Array 1) and one that holds the values of the menu items. (Array 2)
Example of both arrays;
(Array 1, that holds the keys)
Array
(
[0] => 1
[1] => 2
[2] => 0
)
The above array's values are the keys for the new array.
(Array 2, holds the values)
Array
(
[0] => value_0
[1] => value_1
[2] => value_2
)
So I thought it would be best to create a new array which consist out of;
The values of Array 1
The values of Array 2
However, i'm running into a problem. I want the values in array 2 to stick to their keys. So lets say I change the position of value_0 to the last, the new array would look like this;
Array
(
[1] => value_1
[2] => value_2
[0] => value_0
)
Is there a way to achieve this or am I doing it completely wrong?
Edit
Ok, so multidemensional array it is. However i'm having problems creating one.
Array 1 and Array 2 both come from the database. Array 1 with the sorting order and Array 2 contains the values. Now, the values in array 2 are stored like this; value1,value2,value3. So to be able to work with them I explode on , (comma).
The results on the fetchs are both different;
For the first array it returns as many as how many values there are.
(So if there are 3 values, it will return 3 different positions.)
For the second array it will return 18 records, since this is tied to
other menu items (sub menu's etc).
So for the first array I do;
while ($row = mysql_fetch_assoc($result_query_test)) {
$positions[] = $row['position'];
}
For the second array I do;
while ($row = mysql_fetch_assoc($result_values)) {
$array_values = explode(',', $row['values']);
}
From then on i'm having problems creating the multidimensinonal array;
while ($row = mysql_fetch_assoc($result_values)) {
$array_values = explode(',', $row['values']);
foreach ($positions as $new_key) {
foreach ($array_values as $value) {
$new_array[] = array('key' => $new_key, 'value' => $value);
}
}
}
Edit two:
This is what I use now;
(Since $all_values is a multidimensional array because I have to explode on the values beforehand.)
foreach ($all_values as $values) {
foreach ($values as $key => $value) {
$new_array[] = array('key' => $positions[$key], 'value' => $value);
}
}
This is what the $new_array returns;
Array
(
[0] => Array
(
[key] => 0
[value] => value_0
)
[1] => Array
(
[key] => 2
[value] => value_2
)
[2] => Array
(
[key] => 1
[value] => value_1
)
[3] => Array
(
[key] => 0
[value] => value_0
)
[4] => Array
(
[key] => 2
[value] => value_2
)
[5] => Array
(
[key] => 1
[value] => value_1
)
Now I need to get the values and implode them with comma's. However, since not every 3 values (value_0, value_1, value_3) are together I can't do that now.
In this example there are 3 keys, (0,1,2) which should be a different array along with their values, like you did in your example:
Array (
[0] = Array (
[key] = 1,
[value] = value_1
),
[1] = Array (
[key] = 2,
[value] = value_2
),
[2] = Array (
[key] = 0,
[value] = value_0
)
)

Answer 1

Why not make a multidimensional array?
$arrayThree =
Array (
[0] = Array (
[key] = 1,
[value] = value_1
),
[1] = Array (
[key] = 2,
[value] = value_2
),
[2] = Array (
[key] = 0,
[value] = value_0
)
)
No matter what order they're in, the key and value are always the set.
foreach ($arrayThree as $tempArray)
{
echo $tempArray['key'];
echo $tempArray['value'];
}
Create Array
$arrayOne = array();
$arrayTwo = array();
$arrayThree = array();
$query = 'SELECT key FROM table1 ';
$result = mysql_query($query) or die(mysql_error());
while($data = mysql_fetch_assoc($result))
{
$arrayOne[] = $data['key'];
}
$query = 'SELECT value FROM table2 ';
$result = mysql_query($query) or die(mysql_error());
while($data = mysql_fetch_assoc($result))
{
$arrayTwo[] = $data['value'];
}
foreach($arrayOne as $key => $value)
{
$arrayThree[] = array('key' => $value, 'value' => $arrayTwo[$key]);
}
You can always use the mysqli or PDO versions, if you're using them.
Example Data
//THESE MIMIC YOUR SELECT RESULTS
$test_keys = array(1,2,3);
$test_values = array('value_1', 'value_2', 'value_3');
//DEFAULTS
$arrayOne = array();
$arrayTwo = array();
$arrayThree = array();
//WHILE FIRST SELECT
for($i=0;$i<count($test_keys);$i++)
{
$arrayOne[] = $test_keys[$i];
}
//WHILE SECOND SELECT
for($i=0;$i<count($test_values);$i++)
{
$arrayTwo[] = $test_values[$i];
}
//MAKE THE FINAL ARRAY
foreach($arrayOne as $key => $value)
{
$arrayThree[] = array('key' => $value, 'value' => $arrayTwo[$key]);
}
//CHECK THE OUTPUT FOR THE NEW ARRAY
echo '<pre>'.print_r($arrayThree,true).'</pre>';
Example Output
Array
(
[0] => Array
(
[key] => 1
[value] => value_1
)
[1] => Array
(
[key] => 2
[value] => value_2
)
[2] => Array
(
[key] => 3
[value] => value_3
)
)
Imploded List
$implodeValues = array_map(function($item) { return $item['value']; }, $arrayThree);
$implodeVariable = implode(',', $implodeValues);
echo $implodeVariable;
Implode Output
value_1,value_2,value_3

Answer 2

I think you can obtain what you want doing this:
$new = array();
for($i = 0, $len = count($array1), $i < $len, ++$i) {
$new[$array1[$i]] = $array2[$i];
}
now $new contains the values in the order you want them