Search for city state zip - php

Question

So i already have a database of locations of every city, state, zip.
I am currently working on how to do a search and get results of surrounding zip codes x miles away, and have run into some trouble.
I successfully have the search working for you to type in the zip code, since it is a predefined value. But am having trouble with results of a city, state. Currently it only works if you type in just the city name ex "Chicago"... But Does not work if you type in "Chicago, IL".
Here is the code for the $_GET of the search form, searchval
Please Help!
$searchval = $mysql->escape_data($_GET['searchval']);
if (!empty($searchval))
{
if(preg_match("~\d{5}~", $searchval)) {
$zip = $searchval;
}
else {
$city = $searchval;
}
} else
{
$error .= "<div id='Error'>Please enter zip</div>";
$zip = false;
}
Below is the code that actually takes the $zip or $city and gets the surrounding zip codes. if you enter a zip code, it works successfully. If you enter just a city name, it works successfully. If you enter "Chicago, IL" it does not work.
<?php
//if user entered a city ex. "Chicago"
if(isset($city)) {
$q = 'SELECT City, State, ZipCode FROM zipcodes WHERE City like "'. $city .'%" ORDER BY ZipCode ASC Limit 0,10';
$result = $mysql->query($q);
$row = mysqli_fetch_array($result);
$zip = $row[2];
if(mysqli_num_rows($result) != 1) {
echo"Did you mean...<br />";
while($row = mysqli_fetch_array($result)) {
echo "<a href='" .$_SERVER['PHP_SELF'] . "?searchval=".$row[2]."&miles=".$miles."'>" . $row[0] . " " . $row[1] . " " . $row[2] . "</a><br />";
}
}
}
$zcr = new ZipCodesRange($mysql,$zip,$miles);
$zcr->setNewOrigin($zip);
//if user entered a zip code ex. "08026"
if($zcr->validateZipCode($zip)) {
$citystate=$zcr->getCityState($zip);
echo "Zip Codes Within " . $miles ." miles of " . $citystate[0] . ", " . $citystate[1] . " " . $zip;
}
$zcr->setZipCodesInRange();
$zipArray = $zcr->getZipCodesInRange();
asort($zipArray);
$z = implode(",", array_keys($zipArray));
$q = "SELECT * FROM " . TBL_PUBS . " WHERE zip IN ($z) AND( status = 'Pending' OR status = 'Active' )";
$result = $mysql->query($q);
while ($row = $result->fetch_object()) {
$lonlat=$zcr->getLonLat($row->zip);
$distance = $zcr->calculateDistance($lonlat[1], $lonlat[0], $zip);
?>

Answer 1

Was able to solve it using this function...
returns an array of $arr[city] $arr[state] $arr[zip]
function retcszarr($loc){
$usstatenames=array('ALABAMA','ALASKA','AMERICAN SAMOA','ARIZONA','ARKANSAS','CALIFORNIA','COLORADO','CONNECTICUT','DELAWARE','DISTRICT OF COLUMBIA','FEDERATED STATES OF MICRONESIA','FLORIDA','GEORGIA','GUAM','HAWAII','IDAHO','ILLINOIS','INDIANA','IOWA','KANSAS','KENTUCKY','LOUISIANA','MAINE','MARSHALL ISLANDS','MARYLAND','MASSACHUSETTS','MICHIGAN','MINNESOTA','MISSISSIPPI','MISSOURI','MONTANA','NEBRASKA','NEVADA','NEW HAMPSHIRE','NEW JERSEY','NEW MEXICO','NEW YORK','NORTH CAROLINA','NORTH DAKOTA','NORTHERN MARIANA ISLANDS','OHIO','OKLAHOMA','OREGON','PALAU','PENNSYLVANIA','PUERTO RICO','RHODE ISLAND','SOUTH CAROLINA','SOUTH DAKOTA','TENNESSEE','TEXAS','UTAH','VERMONT','VIRGIN ISLANDS','VIRGINIA','WASHINGTON','WEST VIRGINIA','WISCONSIN','WYOMING');
$usstateabbrs=array('AL','AK','AS','AZ','AR','CA','CO','CT','DE','DC','FM','FL','GA','GU','HI','ID','IL','IN','IA','KS','KY','LA','ME','MH','MD','MA','MI','MN','MS','MO','MT','NE','NV','NH','NJ','NM','NY','NC','ND','MP','OH','OK','OR','PW','PA','PR','RI','SC','SD','TN','TX','UT','VT','VI','VA','WA','WV','WI','WY');
if(strpos($loc,',')!==false){
$parts=array_map('trim',explode(',',$loc));
$location['city']=strtoupper($parts[0]);
preg_match('/([^ ]*)(?: +([^ ]+))?/',$parts[1],$statezip);
if(isset($statezip[1])){
$location['state']=strtoupper($statezip[1]);
}
if(isset($statezip[2])){
$location['zip']=$statezip[2];
}
} else {
$parts=array_map('trim',explode(' ',$loc));
while(count($parts)>0){
$part=strtoupper(array_pop($parts));
if(in_array($part,$usstateabbrs)){
$location['state']=$part;
} elseif (in_array($part,$usstatenames)){
$location['state']=$usstateabbrs[array_search($part,$usstatenames)];
} elseif (preg_match('/\d+(?:-\d+)?/',$part,$zip)){
$location['zip']=$zip[0];
} else {
$location['city']=strtoupper(implode(' ',$parts)."$part");
break;
}
}
}
ksort($location);
return $location;
}