显示数字数组php的内容，单号类型

Question

Asking a simple question,

$a = [array(]2, 4, 6, 8);

     echo $a;

why return Array in html page and not the numbers?

Answer 1

Firstly, that's not the way to declare an array in php. You declare it like this:

$a = array(2, 4, 6, 8);

or like this:

$a = [ 2, 4, 6, 8 ];

Secondly, "echo" prints strings. An array is not a string. If you want to print the contents of an array you can use:

print_r($a);

or:

var_dump($a)

or:

foreach($a as $number)
{
   echo($number.' ');
}

or:

echo(implode(',', $a));

or:

echo($a[0]);
echo($a[1]);
// etc