【PHP】連想配列の作り方と呼び出し方：データ管理を配列でやってみる

$arr = array(
    "a" => "あいうえお",
    "b" => "かきくけこ",
    "c" => "さしすせそ",
);


// または
$arr = [
    "a" => "あいうえお",
    "b" => "かきくけこ",
    "c" => "さしすせそ",
];

<?php
$text = $arr['a'];
?>

<p><?php echo $text;?></p>

<p>あいうえお</p>

$arr = array(
    "a" => 
      array(
         "a1" => "あい",
         "a2" => "うえお",
      ),
    "b" => "かきくけこ",
    "c" => "さしすせそ",
);

$elms = $arr['a'];
foreach ($elms as $key => $value) {
    $tmp = $tmp . '<p>' . $key . '：' . $value . '</p>';
}
echo $tmp;

<p>a1：あい</p>
<p>a2：うえお</p>