PHP中数组定义的几种方法

<?php
$a = array("中国人","亚州人","龙王爷","西藏自治区");

$b[0] = "苹果";
$b[1] = "苹果";
$b[2] = "苹果";
$b[3] = "苹果";
$b[4] = "苹果";

$c = array("one" => "中国人","tow" =>"亚州人","three" => "龙王爷","four" => "西藏自治区");

var_dump($a);

echo "<br />";

var_dump($b);

echo "<br />";

var_dump($c);
?>