Search for key and value in php arrays - php

Question

So I have two array, the first one is like:
$MyArray = [
['id' => 1, number => 32],
['id' => 2, number => 4]
];
and the other is like:
$OtherArray = [
['id' => 1, 'show' => X],
['id' => 5, 'show' => X]
];
Where is X, I want it to be equal with the 'number' value of $MyArray where key 'id' = its id.
If there is no $MyArray.id which is equal to $OtherArray.id then it should return 0.
I hope you understand what I mean. I tried everything, what I could, yet, with no success.

Answer 1

Have you tried using a foreach loop here?
Here is a quick example... PHPaste Snippet
<?php
$firstArray = array(
array(
"id" => 1,
"something" => "Hello, World!"
),
array(
"id" => 3, // 3 on purpose
"something" => "Hello, mom?"
)
);
$secondArray = array(
array(
"id" => 1,
"thing" => null
),
array(
"id" => 2,
"thing" => null
)
);
foreach ($firstArray as $key => $value) {
foreach ($secondArray as $k => $v) {
if ($value['id'] == $v['id']) {
echo "Found one!\n------\n" . print_r($value, true) . "\ncontains the same ID as\n\n" . print_r($v, true) . "\n------\n";
// you may also do this if you want
// $secondArray[$k]['thing'] = $value['id'];
// this would set "thing" (in the second array) to the value of "id" (in the first array)
}
}
}
EDIT Here is a second example, displaying how you could use it as a function... PHPaste Snippet.
Note: I used the OLD array syntax because it's easier for new programmers to understand.
So, essentially what you are doing is iterating through each item in $firstArray, comparing it to each item in $secondArray, by doing a nested foreach within side the first foreach if that makes sense...?
Here is what I just said in simple form:
go through each item in array 1
--> compare it to each item in array 2
You may also notice my use of PHP's lovely function, print_r(). This displays objects and arrays in a slightly, clearer, form.
You can also see that I am getting the values from within the arrays by using $value['id'] and $v['id']. These were defined in my foreach declaration, foreach ($firstArray as $key => $value); $value is an associative array, so you can simply get a value by key just as you would if you created an array like this:
$myArray = [
"id" => 1
];
and grabbed values like this:
echo $myArray['id']; // 1
Hopefully this helped.