【PHP】複数の配列・連想配列を結合する方法

$result = array_merge(...$arrays);

<?php
$hobbyArr1 = ['soccer', 'reading'];
$hobbyArr2 = ['soccer', 'fishing'];

$result = array_merge($hobbyArr1, $hobbyArr2);
print_r($result); // Array ( [0] => soccer  => reading  => soccer  => fishing )

<?php
$personArr1 = ['name' => 'Ken', 'age' => 20, 'hobby' => 'reading'];
$personArr2 = ['gender' => 'male', 'hobby' => 'soccer'];

$result = array_merge($personArr1, $personArr2);
print_r($result); // Array ( [name] => Ken [age] => 20 [hobby] => soccer [gender] => male )

<?php
$personArr1 = ['name' => 'Ken', 'age' => 20, 'hobby' => 'reading'];
$personArr2 = ['gender' => 'male', 'hobby' => 'soccer'];

$result = array_merge_recursive($personArr1, $personArr2);
print_r($result); // Array ( [name] => Ken [age] => 20 [hobby] => Array ( [0] => reading  => soccer ) [gender] => male )