How to parse array from MySQL column in PHP

Question

I have column extra_fields in table.

In column i have array, and I need to parse it

 [{"id":"1","value":"fdsds"},{"id":"2","value":"\/images\/powered_by.png"},{"id":"3","value":"fdsfdsfdsfds"},{"id":"4","value":"<p>fdsfdsfdsfds<\/p>"}]

Try to do it with this code,

$extrafields = array();
foreach($this->item->extra_fields as $item)
{   
    $extrafields[$item->id] = $item->value;
}

but return empty string or...I don't know what

Answer 1

it is unclear as to what you want to achieve but here you go:

$test = json_decode('[{"id":"1","value":"fdsds"},{"id":"2","value":"\/images\/powered_by.png"},{"id":"3","value":"fdsfdsfdsfds"},{"id":"4","value":"<p>fdsfdsfdsfds<\/p>"}]');

$extrafields = array();
foreach ($test as $key => $item) {
    $extrafields[$item->id] = $item->value;
}