PHP Error: json_decode() expects parameter 1 to be string, array given

This error message indicates that you are passing an array to the json_decode() function instead of a string.

The json_decode() function is used to decode a JSON string into a PHP variable. Therefore, the parameter passed to this function should be a valid JSON string.

If you are passing an array to this function, you can first convert the array to a JSON string using the json_encode() function and then pass this string to the json_decode() function.

For example:

$data = array('name' => 'John', 'age' => 30);
$json_string = json_encode($data);
$decoded_data = json_decode($json_string);

In this example, the $data array is first converted to a JSON string using the json_encode() function. This JSON string is then passed to the json_decode() function to decode it into a PHP variable.