Loop the PHP Code Until Statement Is True - php

Question

I'm using two API keys to receive the data. That's because provider have some daily quota limit. If quota exceeds the daily limit, 403 error is returned from the server.
I used $http_response_header to check the response from the server. But the problem is that when response returned isn't 200, e.g the API key used exceeds the daily limit, the code should execute again so that another API key is picked randomly. Here's the code I'm using:
$keys = array('1stkey','2ndkey');
$key_r = array_rand($keys);
$yt_key = $keys[$key_r];
$data = file_get_contents("https://example.com/data&key=$yt_key");
if (strpos($http_response_header[0], "200")) {
echo $data;
}
else{
echo 'No';
}

Answer 1

You can create a function of this code, and just re-run the function when the response is not 200. Something like this maybe?
function getAPIData() {
$keys = array('1stkey','2ndkey');
$key_r = array_rand($keys);
$yt_key = $keys[$key_r];
$data = file_get_contents("https://example.com/data&key=$yt_key");
if (strpos($http_response_header[0], "200")) {
echo $data;
}
else {
getAPIData();
}
}
Like #Jaquarh says, you might want to change max_execution_time also. Have a look here and see what works for you.

Answer 2

I've created perfect solution, check this:
$api = array('1st key','2nd key');
$k = array_rand($api);
$api_key_yt = $api[$k];
$total_api=count($api);
for ($loop=0;$loop<=$total_api;$loop++) {
$api_key_yt=$api[$loop];
$request2 = "https://example.com/?data&key=$api_key_yt";
$response = file_get_contents($request2);
$jsonobj = json_decode($response);
if (isset($jsonobj->items)) {break;} else {unset($jsonobj);}
}
print_r($jsonobj);

Answer 3

Please try this
$data = null;
do {
$keys = array('1stkey','2ndkey')
$key_r = array_rand($keys);
$yt_key = $keys[$key_r];
$data = file_get_contents("https://example.com/data&key=$yt_key");
} while ($data == null);