get max an min values from php array [duplicate] - php

Question

This question already has answers here:
Get min and max value in PHP Array
(9 answers)
Closed 4 months ago.
I have the following array $data. n and 0 are identical, it's just the way the data is returned. I need to determine the max and min values for the id value, it looks like the id values are stored as strings, how is this achieved?
Array
(
[0] => stdClass Object
(
[n] => artefact[10.3]{"id": "1", "name": "001", "type": "Artefact"}
[0] => artefact[10.3]{"id": "1", "name": "001", "type": "Artefact"}
)
[1] => stdClass Object
(
[n] => artefact[10.4]{"id": "2", "name": "002", "type": "Artefact"}
[0] => artefact[10.4]{"id": "2", "name": "002", "type": "Artefact"}
)
[2] => stdClass Object
(
[n] => artefact[10.5]{"id": "3", "name": "003", "type": "Artefact"}
[0] => artefact[10.5]{"id": "3", "name": "003", "type": "Artefact"}
)
)

Answer 1

It seems that {"id":....} is a JSON value, and we need to parse the value and collect IDs. Before we need to clean artefact string with preg_replace function. In this case, we can determine max and min values:
<?php
$data = [
[
'0'=>'artefact[10.3]{"id": "1", "name": "001", "type": "Artefact"}',
'n'=>'artefact[10.3]{"id": "1", "name": "001", "type": "Artefact"}',
],
[
'0'=>'artefact[10.4]{"id": "1", "name": "001", "type": "Artefact"}',
'n'=>'artefact[10.4]{"id": "3", "name": "001", "type": "Artefact"}',
],
];
$ids = [];
foreach ($data as $datum) {
foreach ($datum as $item) {
$parsedItem = preg_replace("/artefact\[(.+?)\]/",'',$item);
$jsonDecoded = json_decode($parsedItem);
$ids[] = $jsonDecoded->id;
}
}
$maxId = $ids ? max($ids):0;
$minId = $ids ? min($ids):0;
echo "Max id: $maxId <br> Min id $minId ";