How do I retrieve key from JSON string in PHP

Question

Is there a way to retreive a key from JSON string with out going in to foreach loop?

$json ="{\"error\":{\"code\":301}}";

if (empty($json)) {
    die('empty string');
} else {
    $obj = json_decode($json);
    foreach ($obj as $key => $object) {
        echo $key;
    }  
}

What I need is to detect where the string contains error or not, so I can create error handling.

Thanks in advance

Piotr Olaszewski · Accepted Answer · 2015-08-15 10:54:52Z

1

You can use property_exists() method:

$json ="{\"error\":{\"code\":301}}";


if (empty($json)) {
    die('empty string');
} else {
    $obj = json_decode($json);
    var_dump(property_exists($obj, 'error'));
}

answered Aug 15, 2015 at 10:54

Piotr Olaszewski

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