How to locate an array in a php object with no key - php

Question

I have a database of zip codes from The Zip Code Database Project that came as a .csv file. I converted it to json and it has no key for each array, they look like this:
[
{
"zipcode": 35004,
"state abbreviation": "AL",
"latitude": 33.606379,
"longitude": -86.50249,
"city": "Moody",
"state": "Alabama"
}
]
I have figured out how to search all of the arrays and locate a matching zip code but I can't figure out how to make that search return data about the array that it found it in.
I can search like this:
$filename = './assets/data/zips.json';
$data = file_get_contents($filename);
$zipCodes = json_decode($data);
$inputZip = 55555;
foreach ($zipCodes as $location) {
if ($inputZip == $location->zipcode) {
echo "Success";
}
}
Can anyone tell me how I can use this search (or a better idea) to store the latitude and longitude associated with the searched zip code to two variables? I have wasted nearly my whole weekend on this so any and all help is greatly appreciated.
Also, I have no issue using the raw csv file to perform this function, I just couldn't get as far as I did with json.
Thanks everyone!

Answer 1

To find out the index of an array by a property of the array items, use array_column to get just the values of that column/property, then use array_search to find the index.
<?php
$inputZip = 35004;
$index = array_search($inputZip, array_column($zipCodes, 'zipcode')); // 0
print_r($zipCodes[$index]); // the entire object
https://3v4l.org/TAXQq

Answer 2

Based on your code:
foreach ($zipCodes as $index => $location) { // index is a key
if ($inputZip == $location->zipcode) {
echo "Index is ".$index;
break;
}
}
var_dump($zipCodes[$index]);
I should note that it seems you are doing something wrong because you don`t suppose to store your data like this and loop through array all the time.

Answer 3

To get the keys of an array that is filtered due to certain parameters that must be met you could use array_keys and array_filter.
For Example
$array = [1,2,1,1,1,2,2,1,2,1];
$out = array_filter($array,function($v) {
return $v == 2;
});
print_r(array_keys($out));
Output
Array
(
[0] => 1
[1] => 5
[2] => 6
[3] => 8
)
Try the above example in PHP Sandbox
To match your actual data structure.
$json = '[{"zipcode": 35004,"state abbreviation": "AL","latitude": 33.606379,"longitude": -86.50249,"city": "Moody","state": "Alabama"},{"zipcode": 35004,"state abbreviation": "AL","latitude": 33.606379,"longitude": -86.50249,"city": "Moody","state": "Alabama"},{"zipcode": 35005,"state abbreviation": "AL","latitude": 33.606579,"longitude": -86.50649,"city": "Moody","state": "Alabama"}]';
$array = json_decode($json);
$out = array_filter($array, function($v) use ($inputZip) {
return $v->zipcode == $inputZip; // for the below output $inputZip=35004
});
print_r(array_keys($out));
Output
Array
(
[0] => 0
[1] => 1
)
Try the example in PHP Sandbox