PHP array_intersect / array_diff / combine array - php

Question

$arr[] = array('title' => 'Overview');
$arr[] =array('title' => 'General');
$arr[] =array('title' => 'History');
$arr[] =array('title' => 'Construction');
$arr[] =array('title' => 'Plan');
$arr[] =array('title' => 'Other');
$info_arr[] = array("title" => "General", text => "value1");
$info_arr[] = array("title" => "History", text => "value1");
$info_arr[] = array("title" => "Construction", text => "value1");
$info_arr[] = array("title" => "Plan", text => "value1");
I need to be able merge these arrays together.So they look something like this. As I will need to loop thru the consolidated array. Other, Overview do not have any text values but still need to placed into the array.
$new_arr[] = array("title" => "General", text => "value1", "title" => "History", text => "value1", "title" => "Construction", text => "value1"
,"title" => "Plan", text => "value1","title" => "Overview", text => "","title" => "Other", text => "");
I have tried for loops (using count value), foreach loops, I thought array_intersect or array_diff don't see to solve the issue. This should not be so difficult, but I'm trying to piece together some really bad legacy code. Or the cube/florescent lights might have finally got to me.
Update:
while ($stmt->fetch()) {
$arr[] = array("title" => $Title);
}
and
while ($dstmt->fetch()) {
$info_arr[] = array("title" => $descriptionType, "descriptiontext" => $descriptionText); , "descriptiontext" => $val );
}
$dstmt & $stmt are queries.
I thought this would work but not so much
$r = array_intersect($arr, $info_arr);
var_dump($r);
Something like this Let me clarify:
$new_arr = array(array("title" => "General", text => "value1"),
array("title" => "History", text => "value1"),
array("title" => "Construction", text => "value1"),
array("title" => "Plan", text => "value1"),
array("title" => "Overview", text => ""),
array("title" => "Other", text => "")
);

Answer 1

If you want to work with these two arrays, you can just use the title as the key in $r.
foreach (array_merge($arr, $info_arr) as $x) {
$r[$x['title']]['title'] = $x['title'];
$r[$x['title']]['text'] = isset($x['text']) ? $x['text'] : '';
}
Or, you can go back a step and avoid having separate arrays by building the $r array in the same manner as you fetch your query results:
while ($stmt->fetch()) {
$r[$Title] = array('title' => $Title, 'text' => '');
}
while ($dstmt->fetch()) {
$r[$descriptionType] = array("title" => $descriptionType, "text" => $descriptionText);
}
Or, ideally, you could go back another step and avoid having separate queries by using a JOIN to get the same results in one query, but there's nothing in the question on which to base any specific suggestion for that.

Answer 2

As stated in the comments, the exact $new_arr you're requesting isn't possible. However, I think this will give you a similar result that should work for your purposes:
foreach ($info_arr as $infoArray) {
$found = array_search(array('title' => $infoArray['title']), $arr);
if (false !== false) {
unset($arr[$found]);
}
}
$new_arr = array_merge($info_arr, $arr);
It works by removing the "duplicates" from the original $arr before doing the array_merge().
If it's important to add an empty text value for the remaining items in $arr, do this before the array_merge():
foreach ($arr as &$arrArray) {
$arrArray['text'] = '';
}
The resulting array will look like this:
$new_arr[] = array(
array(
'title' => 'General',
'text' => 'value1',
),
array(
'title' => 'History',
'text' => 'value1',
),
array(
'title' => 'Construction',
'text' => 'value1',
),
array(
'title' => 'Plan',
'text' => 'value1',
),
array(
'title' => 'Overview',
'text' => '',
),
array(
'title' => 'Other',
'text' => '',
),
);