- array_chunk: documentation ( source)
- var_export: documentation ( source)
- array_values: documentation ( source)
<?php
$arr = [
'SELECT0' => 'orange',
'INPUT0' => '100',
'SELECT1' => 'bannana',
'INPUT1' => '200',
'SELECT2' => 'apple',
'INPUT2' => '300'
];
$result = [];
foreach (array_chunk(array_values($arr), 2) as [$newKey, $result[$newKey]]);
var_export($result);