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<?php//var_dump($_POST);//print "<br>"; //error_reporting(E_ALL & ~E_NOTICE);include("navigation.php");include("config.php");// I'm assuming that dropdown 1_1 is the first one, 1_2 is the second one and so on.// subcat_1_1_1 is the first checkbox in the first dropdown in the first of the three sections.// subcat_1_1_2 is the second checkbox in that dropdown and so on.  $name = $_POST['name'];$green = $_POST['green'];$eco = $_POST['eco'];$dfe = $_POST['dfe'];$cate = array();foreach($_POST AS $key => $value) {   if (is_int(strpos($key,"cattag"))) {      $t = explode("_",$key);      $a = $t[1];      $b = $t[2];      $c = $t[3];            $cate[$a][$b][$c] = $value;   }}echo "<br>";echo sizeof($cate);echo "<br>cate:<br>";var_dump($cate);echo "<br>";$categories = array();foreach($_POST AS $key => $value) {   if (is_int(strpos($key,"subcat"))) {      $t = explode("_",$key);      $a = $t[1];      $b = $t[2];      $c = $t[3];            $categories[$a][$b][$c] = $value;   }}print "<br>categories dump<br>";var_dump($categories);echo sizeof($categories);print "end categories dump<br>";print "<br>"; // Now you have an array with all checkboxes, something like// $subcat[1][1][1] = The number of the first checked checkbox in the first category// $subcat[1][1][2] = The number of the second checked checkbox  in the first category and so on.// $subcat[1][2][1] = The number of the first checked checkbox in the second category// $subcat[1][2][2] = The number of the second checked checkbox in the second category and so on.// $subcat[2][1][1] = The number of the first checked checkbox in the first category, second section// $subcat[2][1][2] = The number of the second checked checkbox  in the first category, second section and so on.   $key_exists = true;$subkey_exists = true;$strings = array();// Loops through and turns all categories' arrays into strings foreach ($categories AS $key1 => $array1) {   foreach ($array1 AS $key2 => $array2) {      $strings[$key1][$key2] = implode(';', $array2);   }}   echo sizeof($strings);print "<br>strings start<br>";var_dump($strings);print "<br>strings end<br><br>";  // Now strings[] contains all the strings (like 1;3;5 and 3;5;7). Loop through the array:foreach ($strings AS $key1 => $array1) {   foreach ($value1 AS $key2 => $array2) {      printf(         "INSERT into item_new (name, green, eco, dfe, section, category, subcategory) VALUES ('%s','%s','%s','%s','%s','%s',';%s;')<br> ",         $name, $green, $eco, $dfe, $key1, $cate[$key1][1][$key2], $array2);   }}   	  // Done. // Store that field in the DB and then when you want them into an array again, do:// $array = exlode(';', $string);echo "<font color=green>Successfully Inserted info Database</font>"; ?>