- var_dump: documentation ( source)
- array_merge: documentation ( source)
<?php
$array1 = [
['Value1', 'Value2'],
['Value3', 'Value4'],
['Value5', 'Value6']
];
$array2 = [
['ValA', 'ValB', 'ValC'],
['ValD', 'ValE', 'ValF']
];
$result = array_merge($array1[0], $array2[0]);
var_dump($result);