Google maps address and map display (exceed limit image) - php

Question

I have following problem. I'm using google maps in php to get the address of latitude and longitude and a map snapshot of this location.
To obtain address I use following code:
// INITIALIZING CURL
$returnValue = NULL;
$ch = curl_init();
// SERVICE CALL
$url = "http://maps.googleapis.com/maps/api/geocode/json?latlng=".$lat.",".$lon."&sensor=false";
// SETTING PARAMS OF CURL
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
// GETTING AND RESULTING RESULT
$result_part = curl_exec($ch);
$json = json_decode($result_part, TRUE);
And I parse obtained JSON as follows:
// PARSING RESULTS FROM JSON
if (isset($json['results'])) {
foreach ($json['results'] as $result_part) {
foreach ($result_part['address_components'] as $address_component) {
$types = $address_component['types'];
// GETTING STREET
if (in_array('route', $types)) {
$addr = $address_component['long_name'];
}
// GETTING STREET NUMBER
if (in_array('street_number', $types)) {
$number = $address_component['long_name'];
}
// GETTING COUNTRY
if (in_array('country', $types)) {
$country = $address_component['long_name'];
}
// GETTING POSTAL CODE
if (in_array('postal_code', $types)) {
$postal_code = $address_component['long_name'];
}
// GETTING CITY
if (in_array('locality', $types)) {
$city = $address_component['long_name'];
}
}
}
}
It works fine but sometimes the address is not obtained. It looks like some overload of requests but I dont understand why because the site that I'm programming is not accessible yet for other people.
Other problem connected to this is the map snapshots. Here is the code:
<? echo "<a href = \"https://maps.google.com/maps?q=".$lat.",".$lon."\" target=\"_blank\">" ?>
<? echo "<img src=\"http://maps.googleapis.com/maps/api/staticmap?center=" . $lat . "," . $lon . "&zoom=16&size=200x200&markers=color:blue%7Clabel:I%7C" . $lat . "," . $lon . "&sensor=false\" alt=\"google maps\" width=\"200\" height=\"200\" /></a>" ?>
This works also fine but sometimes I obtain image like this:
I doubt that I exceeded the limit.
Any ideas ? Thank you for your answers.

Answer 1

As #geocodezip has suggested it could be because of not using a key.
Also as per the reverse geocoding documentation on :
https://developers.google.com/maps/documentation/geocoding/#ReverseGeocoding
Note: Reverse geocoding is an estimate. The geocoder will attempt to find the closest addressable location within a certain tolerance; if no match is found, the geocoder will return zero results.