从数组PHP生成逗号分隔的字符串列表

Question

I am trying to write a function in PHP, but being a novice I am finding it a bit difficult to do so. I have an array which looks like

[{"x":"12345","y":"john"},{"x":"12345","y":"stars"}]

The function which I am writing is

function getCSV($x)
{

    // Now I want to pass the $x which in the above array is 12345 and get "john,stars"  as output
}

Are there any methods available in PHP that can do this, or what would be the best approach to get it?

Answer 1

That looks like a json to me

[{"x":"12345","y":"john"},{"uid1":"12345","uid2":"stars"}]


function getCSV($x)
{
    $arr = json_decode($x);
    echo $arr[0]->y . ', ' . $arr[1]->uid2;
}

This looks horrible, but withouth further explanation is the only thing that works

EDIT - after your edit

function getCSV($x)
{
    $arr = json_decode($x);
    $y = array();
    foreach($arr as $obj){
        $y[] = $obj->y;
    }
    return implode(',', $y);
}

here is a working pad http://codepad.org/HzttdmjW