json_encode_pretty

gistfile1.php

<?php
/**
 * Input an object, returns a json-ized string of said object, pretty-printed
 *
 * @param mixed $obj The array or object to encode
 * @return string JSON formatted output
 */
function json_encode_pretty($obj, $indentation = 0) {
  switch (gettype($obj)) {
    case 'object':
      $obj = get_object_vars($obj);
    case 'array':
      if (!isset($obj[0])) {
        $arr_out = array();
        foreach ($obj as $key => $val) {
          $arr_out[] = '"' . addslashes($key) . '": ' . json_encode_pretty($val, $indentation + 1);
        }
        if (count($arr_out) < 2) {
          return '{' . implode(',', $arr_out) . '}';
        }
        return "{\n" . str_repeat("  ", $indentation + 1) . implode(",\n".str_repeat("  ", $indentation + 1), $arr_out) . "\n" . str_repeat("  ", $indentation) . "}";
      } else {
        $arr_out = array();
        $ct = count($obj);
        for ($j = 0; $j < $ct; $j++) {
          $arr_out[] = json_encode_pretty($obj[$j], $indentation + 1);
        }
        if (count($arr_out) < 2) {
          return '[' . implode(',', $arr_out) . ']';
        }
        return "[\n" . str_repeat("  ", $indentation + 1) . implode(",\n".str_repeat("  ", $indentation + 1), $arr_out) . "\n" . str_repeat("  ", $indentation) . "]";
      }
      break;
    case 'NULL':
      return 'null';
      break;
    case 'boolean':
      return $obj ? 'true' : 'false';
      break;
    case 'integer':
    case 'double':
      return $obj;
      break;
    case 'string':
    default:
      $obj = str_replace(array('\\','"',), array('\\\\','\"'), $obj);
      return '"' . $obj . '"';
      break;
  }
}