内爆后如何从字符串中选择每个元素

Question

I have an array, and I imploded it into a string. Now how can i select each element from that string?

$shop['cat2'] = $cat2;
$allstring= implode(",", $cat2)
foreach ($allstring as $each_string_value){
}

This is not working as I am getting an error "invalid argument supplied foreach()

Answer 1

Just use the initial array inside the foreach loop:

$shop['cat2'] = $cat2;
$allstring = implode(",", $cat2);

foreach ($cat2 as $each_string_value)
{
    // Do your loop stuff here...
}