matching multidimensional arrays by key value, preserving other values - php

Question

I have an array that contains data in the following format:
$myArray = array(
array(
'id' = 1,
'title' = 'the first entry',
'data' = 'additional data'
),
array(
'id' = 2,
'title' = 'the third entry',
'data' = 'some more data'
),
array(
'id' = 3,
'title' = 'the second entry',
'data' = 'other important stuff'
)
);
(An array containing about 12 child arrays in total). This data needs to be split into two rows for displaying on my page, based on the title attribute. I know what titles I want on the first row, and which ones for the second row. So I have another array like this:
$firstRow = array('the first entry', 'the second entry');
$secondRow = array('the third entry');
So what I need to do is throw these 3 arrays, $myArray, $firstRow, $secondRow into a function which will output a new ordered array which preserves the other attributes (the id and data keys in my example) like the following:
$newArray = array(
'firstRow' => array(
array(
'id' = 1,
'title' = 'the first entry',
'data' = 'additional data'
),
array(
'id' = 2,
'title' = 'the second entry',
'data' = 'some more data'
)
),
'secondRow' => array(
array(
'id' = 3,
'title' = 'the third entry',
'data' = 'other important stuff'
)
)
);
I have some ideas, and I know there are various functions like array_intersect(), but I'm not sure which is the best to use? Hopefully someone has a quick and easy solution to this. Thanks.

Answer 1

Use a foreach to loop over the titles array, and create a new array inside the loop, depending on the title value:
function groupTitlesintoArrays($myArray, $firstRow, $secondRow) {
$result = array();
foreach ($myArray as $innerArray) {
foreach ($firstRow as $row) {
if ($row == $innerArray['title']) {
$result['firstRow'][] = $innerArray;
}
}
foreach ($secondRow as $row) {
if ($row == $innerArray['title']) {
$result['secondRow'][] = $innerArray;
}
}
}
return $result;
}
Demo