データベースエンジニアが行く

print_r( $array_A )
Array ( [reg_date] => 2018-07-27 [fluit] => りんご [vagetable] => じゃがいも)

print_r( $array_B )
Array ( [weather] => 晴れ [お菓子] => せんべえ )


$array_AB = array_merge($array_A , $array_B );
print_r( $array_AB )
Array ( [reg_date] => 2018-07-27 [fluit] => りんご [vagetable] => じゃがいも [weather] => 晴れ [お菓子] => せんべえ )