PHP recursive array_search - php

Question

From the code below I can compare the 2 arrays and find out the $subset elements position range in $array.
$array = [8,2,3,7,4,6,5,1,9];
$subset = [6,3,7];
function get_range($array, $subset)
{
$min = sizeof($array);
$max = 0;
foreach($subset as $value) {
$occurrence = array_search($value, $array);
if( $occurrence < $min ) {
$min = $occurrence;
}
if( $occurrence > $max ) {
$max = $occurrence;
}
}
return [$min, $max];
}
$range = get_range($array, $subset); // result as an array -> [2, 5]
However, I want to do a recursive array_search for my multidimentional array like:
$subset = array (
array(6,3,7),
array(4,2,9),
array(3,5,6),
);
How can I do this? Expecting results -> [2, 5], [1, 8], [2, 6].

Answer 1

You do not need a recursion here, simply add an additional loop in the get_range() function. The following example is based on your code and is a possible solution to your problem:
<?php
$array = [8,2,3,7,4,6,5,1,9];
$subsets = array (
array(6,3,7),
array(4,2,9),
array(3,5,6),
);
function get_range($array, $subsets)
{
$result = array();
foreach ($subsets as $subset) {
$min = sizeof($array);
$max = 0;
foreach($subset as $value) {
$occurrence = array_search($value, $array);
if( $occurrence < $min ) {
$min = $occurrence;
}
if( $occurrence > $max ) {
$max = $occurrence;
}
}
$result[] = [$min, $max];
}
return $result;
}
$range = get_range($array, $subsets);
echo print_r($range, true);
?>
Result:
Array (
[0] => Array ( [0] => 2 [1] => 5 )
[1] => Array ( [0] => 1 [1] => 8 )
[2] => Array ( [0] => 2 [1] => 6 )
)