<?php

/**
 * This allows for a Search Request to be Parsed to extract key
 *  values from it while leaving all other text within the request.
 *
 * @author Noah Halstead <nhalstead00@gmail.com>
 */

$str = 'parent:11 student:344,234,22 status:paid Something Else to Search';
$p = [];
$s = [];
$o = [];

$re = '/([a-zA-Z]*)([\s]{0,1}):([a-zA-Z0-9,]*)(\s|)/m';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
foreach($matches as $m){
    $mm = strtolower($m[1]);
    switch($mm){
     case "parent":
        $pt = $m[3];
        $pt = explode(',', $pt);
        $pt = array_map('trim', $pt);
        $pt = array_map('intval', $pt);
        $p = array_merge($p, $pt);
        $str = str_replace($m[0], "", $str);
        break;
     case "student":
        $st = $m[3];
        $st = explode(',', $st);
        $st = array_map('trim', $st);
        $st = array_map('intval', $st);
        $s = array_merge($s, $st);
        $str = str_replace($m[0], "", $str);
        break;
     case "status":
        $status = $m[3];
        $status = explode(',', $status);
        $status = array_map('trim', $status);
        $o = array_merge($o, $status);
        $str = str_replace($m[0], "", $str);
        break;
      default:
        // Unknown Key
        break;
    }
}

echo "<br>Student: " . json_encode($s) . "&nbsp;&nbsp;&nbsp;&nbsp;Parent: " . json_encode($p) . "&nbsp;&nbsp;&nbsp;&nbsp;Status Codes: ". json_encode($o) . "<br> Also Search with: `" . $str . "`";


?>