直接将变量声明为数组
用array()语言结构构建数组
"red","green",3=>"white",5,"black");
print_r($colorful);
?>
数组元素“值”的访问
"red","green"=>"green","white"=>"white","blue"=>"blue");
$colors["black"] = "black";
$colors["red"] = "#FF0000";
print_r($colors);
echo "
";
if(isset($colors["green"]))
{
echo "我是1";
}
echo "
";
unset($colors["green"]);
if(!isset($colors["green"]))
{
echo "我是2";
}
echo "
";
echo gettype($colors["blue"]);
echo "
";
var_dump($colors["blue"]);
?>