mysqli_num_rows() expects parameter 1 to be mysqli_result geolocation - php

Question

I really don't know what i'm doing wrong. I want to count the rows in my query. My id's started from 1 to ... step 1, so the biggest number is the last record. I only want to let the script run on the last record of de DB. So here is my code.
public function saveLongLan()
{
define("MAPS_HOST", "maps.google.com");
define("KEY", "MYKEY");
$link = mysql_connect('localhost', 'root', 'root');
if (!$link) {
die('Not connected : ' . mysql_error());
}
// Set the active MySQL database
$db_selected = mysql_select_db('Foodsquare', $link);
if (!$db_selected)
{
die("Can\'t use db : " . mysql_error());
}
$query = "SELECT * FROM tblPlaces WHERE 1";
$result = mysql_query($query);
$row_cnt = mysqli_num_rows($result);
if (!$result)
{
die("Invalid query: " . mysql_error());
}
$delay = 0;
$base_url = "http://" . MAPS_HOST . "/maps/geo?output=xml" . "&key=" . KEY;
while ($row = #mysql_fetch_assoc($result))
{
$geocode_pending = true;
while ($geocode_pending)
{
$address = $row["Street"];
$id = $row["Id"];
$request_url = $base_url . "&q=" . urlencode($address);
$xml = simplexml_load_file($request_url) or die("url not loading");
$status = $xml->Response->Status->code;
if (strcmp($status, "200") == 0)
{
// Successful geocode
$geocode_pending = false;
$coordinates = $xml->Response->Placemark->Point->coordinates;
//explode functie breekt een string af vanaf een bepaald teken en stopt hem dan in een array
$coordinatesSplit = explode(',', $coordinates);
// formaat: Longitude, Latitude, Altitude
$lat = $coordinatesSplit[1];//getal = plaats in array
$lng = $coordinatesSplit[0];
$query = sprintf("UPDATE tblPlaces " .
" SET lat = '%s', lng = '%s' " .
" WHERE id = '". $row_cnt . "' LIMIT 1;",
mysql_real_escape_string($lat),
mysql_real_escape_string($lng),
mysql_real_escape_string($id));
$update_result = mysql_query($query);
if (!$update_result)
{
die("Invalid query: " . mysql_error());
}
} else if (strcmp($status, "620") == 0)
{
// sent geocodes too fast
$delay += 100000;
}
else
{
// failure to geocode
$geocode_pending = false;
echo "Address " . $address . " failed to geocoded. ";
echo "Received status " . $status . " \n";
}
usleep($delay);
}
}
}

Answer 1

your query is incorrect $query = "SELECT * FROM tblPlaces WHERE 1";
you should specify the column name after where clause for comparison with a value for example: WHERE column_name = 1 or something like that.

Answer 2

You're using mysqli_num_rows($result) but you aren't using MySQLi.
Change:
$row_cnt = mysqli_num_rows($result);
To:
$row_cnt = mysql_num_rows($result);
And you should be good to go.