$res = json_decode (json_encode ($res), true);
in the above code, encode is followed by decode, which is why
$res = json_decode (json_encode ($res), true);
in the above code, encode is followed by decode, which is why
estimate that $res is an object before, convert the $res object to json data, then decode the json data and set the second parameter of json_decode to true to convert $res into an array. In short, turn the $res object into an array.
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