[PHP] 連想配列の配列を作成する

<?php
 //連想配列１を生成
 $arr1 = array(
    'key1' => 'val1',
    'key2' => 'val2',
    'key3' => 'val3'
 );

 //連想配列２を生成
 $arr2 = array(
    'key1' => 'val4',
    'key2' => 'val5',
    'key3' => 'val6'
 );

 //連想配列３を生成
 $arr3 = array(
    'key1' => 'val7',
    'key2' => 'val8',
    'key3' => 'val9'
 );

 //連想配列１～３を配列にセット
 $arr[] = $arr1;
 $arr[] = $arr2;
 $arr[] = $arr3;

 //配列の中身を取り出して表示する
 foreach ($arr as $key => $val) {
    print $key . "/";
    print $val['key1'];
    print "-";
    print $val['key2'];
    print "-";
    print $val['key3'];
    print "";
 }