sezfAllCounties.php

<?php

// Get all Counties for the following state, AL, FL, GA, NC, SC
$al_file = "http://www2.census.gov/geo/docs/reference/codes/files/st01_al_cou.txt";
$fl_file = "https://www2.census.gov/geo/docs/reference/codes/files/st12_fl_cou.txt";
$ga_file = "https://www2.census.gov/geo/docs/reference/codes/files/st13_ga_cou.txt";
$nc_file = "https://www2.census.gov/geo/docs/reference/codes/files/st37_nc_cou.txt";
$sc_file = "https://www2.census.gov/geo/docs/reference/codes/files/st45_sc_cou.txt";

$states = array($al_file, $fl_file, $ga_file, $nc_file, $sc_file);
$allCounties = array();

foreach ($states as $state) {
    $csv = array_map('str_getcsv', file($state));
    array_walk($csv, function(&$a) use ($csv) {
        $a = array_combine(array('STATE','STATEFP','COUNTYFP','COUNTYNAME','CLASSFP'), $a);
    });
    $allCounties[] = array_column($csv, 'COUNTYNAME');
}

$iter = new RecursiveIteratorIterator(new RecursiveArrayIterator($allCounties));
$new_arr = array();
foreach($iter as $v) {
    $new_arr[]=$v;
}

$finalCountyArray = array();
foreach ($new_arr as $arr) {
    $finalCountyArray[] = str_replace(' County', '', trim(ucwords(strtolower($arr))));
}

array_push($finalCountyArray,"Greensville","Giles");

// Greensville - VA
// Giles - TN

sort($finalCountyArray);
$uniqueCounties = array_unique($finalCountyArray);
//echo "\n" . count($uniqueCounties) . "\n\n";  // Count

$allCounties = '';
foreach ($uniqueCounties as $uniqueCounty) {
    $allCounties .= "'" . addslashes($uniqueCounty) . "',"; //add slashes just in case
}
$allCounties = rtrim($allCounties,",");   // trim last comma ,
echo '$meeting_counties_and_sub_provinces = array(';
echo $allCounties;
echo ');';