如何修复wp_remote_get（）错误//从数组中获取值？

Question

I want to get each Bank_name on WordPress from the array while calling an external Api. I used wp_remote_get() . While doing the foreach loop with the array, I got this error:

Invalid argument supplied for foreach().

To debug the error, I tried echoing first one Bank_name by providing an index. I did exact same thing in two ways but one works and the other one doesn't. The only difference is that, one way uses wp_remote_get() , while other one uses the response as an array without calling any api.

Where is the error coming from?

This doesn't work:

    $request = wp_remote_get( 'https://tv-api-dev.azurewebsites.net/api/GetBankInfo' );
    if( is_wp_error( $request ) ) {
        return false; 
    }

    $body = wp_remote_retrieve_body( $request );
    $test = json_decode( $body, true );

    print_r($test) ; 
    echo $test[0]["Bank_name"]; 

The following works fine:

$someJSON = "[\r\n {\r\n \"Bank_id\": 1,\r\n \"Bank_name\": \"Aktia Pankki\"\r\n },\r\n {\r\n \"Bank_id\": 2,\r\n \"Bank_name\": \"Bigbank\"\r\n },\r\n {\r\n \"Bank_id\": 3,\r\n \"Bank_name\": \"POP Pankit\"\r\n },\r\n {\r\n \"Bank_id\": 4,\r\n \"Bank_name\": \"Bonum Pankki\"\r\n },\r\n {\r\n \"Bank_id\": 5,\r\n \"Bank_name\": \"Citibank\"\r\n },\r\n {\r\n \"Bank_id\": 6,\r\n \"Bank_name\": \"Danske Bank\"\r\n },\r\n {\r\n \"Bank_id\": 8,\r\n \"Bank_name\": \"DNB BANK ASA\"\r\n },\r\n {\r\n \"Bank_id\": 9,\r\n \"Bank_name\": \"Handelsbanken\"\r\n },\r\n {\r\n \"Bank_id\": 10,\r\n \"Bank_name\": \"Holvi\"\r\n },\r\n {\r\n \"Bank_id\": 11,\r\n \"Bank_name\": \"Nordea Pankki\"\r\n },\r\n {\r\n \"Bank_id\": 12,\r\n \"Bank_name\": \"OP Ryhmä\"\r\n },\r\n {\r\n \"Bank_id\": 13,\r\n \"Bank_name\": \"S-Pankki\"\r\n },\r\n {\r\n \"Bank_id\": 14,\r\n \"Bank_name\": \"Swedbank\"\r\n },\r\n {\r\n \"Bank_id\": 15,\r\n \"Bank_name\": \"Säästöpankki\"\r\n },\r\n {\r\n \"Bank_id\": 16,\r\n \"Bank_name\": \"Alandsbanken\"\r\n }\r\n]";

  // Convert JSON string to Array
  $someArray = json_decode($someJSON, true);
   print_r($someArray);        // Dump all data of the Array
  echo $someArray[0]["Bank_name"]; // Access Array data
  echo $someArray[0]["Bank_id"]; // Access Array data

From 2nd way, I get output Aktia Pankki1, which is what I expect also from the 1st way but I get this message:

Warning: Illegal string offset 'Bank_name' in C:\\xampp\\htdocs\\wpsummerproject\\wp-content\\themes\\astra\\functions.php on line 181

Answer 1

I tried the data from the given URL. Not sure why but in the first json_decode() , the obtained value is the single JSON object with sub items. When that value is again called with json_decode() then value is obtained as an array. You may want to check in the source first how data is converted to JSON. There seems to be the problem.

$request = wp_remote_get( 'https://tv-api-dev.azurewebsites.net/api/GetBankInfo' );
if( is_wp_error( $request ) ) {
    return false;
}

$body = wp_remote_retrieve_body( $request );
$body_content = json_decode( $body, true );
$details = json_decode( $body_content, true );
print_r( $details[0]['Bank_name']);
print_r( $details[0]['Bank_id']);

Answer 2

Try:

$url      = 'https://tv-api-dev.azurewebsites.net/api/GetBankInfo';

$response = wp_remote_get( esc_url_raw( $url ) );

/* Will result in $api_response being an array of data,
parsed from the JSON response of the API listed above */

$api_response = json_decode( wp_remote_retrieve_body( $response ), true );

This is an example from codex.wordpress.org Your link: https://tv-api-dev.azurewebsites.net/api/GetBankInfo goes to a valid json. Should work.

Answer 3

This will work in your case,

$request = wp_remote_get( 'https://tv-api-dev.azurewebsites.net/api/GetBankInfo' );
if( is_wp_error( $request ) ) {
    return false; 
}

$body = wp_remote_retrieve_body( $request );
$test = json_decode( $body,true );
$test = json_decode($test,true);

echo $test[0]['Bank_name'];