arr2jsonUTF8

arr2json.php

<?php
function array2json($arr) {
     $parts = array();
     $is_list = false;

     if (!is_array($arr)) return;
     if (count($arr)<1) return '{}';

     //Find out if the given array is a numerical array
     $keys = array_keys($arr);
     $max_length = count($arr);

     if(($keys[0] == 0) and ($keys[$max_length] == $max_length)) {//See if the first key is 0 and last key is length - 1
         $is_list = true;
         for($i=0; $i<count($keys); $i++) { //See if each key correspondes to its position
             if($i != $keys[$i]) { //A key fails at position check.
                 $is_list = false; //It is an associative array.
                 break;
             }
         }
     }
     foreach($arr as $key=>$value) {
         if(is_array($value)) { //Custom handling for arrays
             if($is_list) $parts[] = array2json($value); /* :RECURSION: */
             else $parts[] = '"' . $key . '":' . array2json($value); /* :RECURSION: */
         } else {
             $str = '';
             if(!$is_list) $str = '"' . $key . '":';
             //Custom handling for multiple data types
             if(is_numeric($value)) $str .= $value; //Numbers
             elseif($value === false) $str .= 'false'; //The booleans
             elseif($value === true) $str .= 'true';
             else $str .= '"' . addslashes($value) . '"'; //All other things
             // :TODO: Is there any more datatype we should be in the lookout for? (Object?)
             $parts[] = $str;
         }
     }
     $json = implode(',',$parts);
     if($is_list) return '[' . $json . ']';//Return numerical JSON
     return '{' . $json . '}';//Return associative JSON
}