phpjson_encode函数的替代方法(可显示中文)

2. /**
3. * json_encode的替代函数
4. * Edit bbs.it-home.org
5. */
6. function jsonEncode($var) {
7. if (function_exists('json_encode')) {
8. return json_encode($var);
9. } else {
10. switch (gettype($var)) {
11. case 'boolean':
12. return $var ? 'true' : 'false'; // Lowercase necessary!
13. case 'integer':
14. case 'double':
15. return $var;
16. case 'resource':
17. case 'string':
18. return '"'. str_replace(array("\r", "\n", "<", ">", "&"),
19. array('\r', '\n', '\x3c', '\x3e', '\x26'),
20. addslashes($var)) .'"';
21. case 'array':
22. // Arrays in JSON can't be associative. If the array is empty or if it
23. // has sequential whole number keys starting with 0, it's not associative
24. // so we can go ahead and convert it as an array.
25. if (emptyempty ($var) || array_keys($var) === range(0, sizeof($var) - 1)) {
26. $output = array();
27. foreach ($var as $v) {
28. $output[] = jsonEncode($v);
29. }
30. return '[ '. implode(', ', $output) .' ]';
31. }
32. // Otherwise, fall through to convert the array as an object.
33. case 'object':
34. $output = array();
35. foreach ($var as $k => $v) {
36. $output[] = jsonEncode(strval($k)) .': '. jsonEncode($v);
37. }
38. return '{ '. implode(', ', $output) .' }';
39. default:
40. return 'null';
41. }
42. }
43. }
45. echo jsonEncode(array('first'=>'testing','second'=>'tangjili'));
46. ?>

也可以是下面这样的代码。

2. function php_json_encode( $data ) {
3. if( is_array($data) || is_object($data) ) {
4. $islist = is_array($data) && ( emptyempty($data) || array_keys($data) === range(0,count($data)-1) );
5. if( $islist ) $json = '[' . implode(',', array_map('php_json_encode', $data) ) . ']';
6. else {
7. $items = Array();
8. foreach( $data as $key => $value ) $items[] = php_json_encode("$key") . ':' . php_json_encode($value);
9. $json = '{' . implode(',', $items) . '}';
10. }
11. } elseif( is_string($data) ) {
12. $string = '"' . addcslashes($data, "\\\"\n\r\t/" . chr(8) . chr(12)) . '"';
14. $json = '';
15. $len = strlen($string);
16. for( $i = 0; $i < $len; $i++ ) {
17. $char = $string[$i];
19. $c1 = ord($char);
20. if( $c1 <128 ) { $json .= ($c1 > 31) ? $char : sprintf("\\u%04x", $c1); continue; }
21. $c2 = ord($string[++$i]);
22. if ( ($c1 & 32) === 0 ) { $json .= sprintf("\\u%04x", ($c1 - 192) * 64 + $c2 - 128); continue; }
23. $c3 = ord($string[++$i]);
24. if( ($c1 & 16) === 0 ) { $json .= sprintf("\\u%04x", (($c1 - 224) <<12) + (($c2 - 128) << 6) + ($c3 - 128)); continue; }
25. $c4 = ord($string[++$i]);
26. if( ($c1 & 8 ) === 0 ) {
27. $u = (($c1 & 15) << 2) + (($c2>>4) & 3) - 1;
28. $w1 = (54<<10) + ($u<<6) + (($c2 & 15) << 2) + (($c3>>4) & 3);
29. $w2 = (55<<10) + (($c3 & 15)<<6) + ($c4-128);
30. $json .= sprintf("\\u%04x\\u%04x", $w1, $w2);
31. }
32. }
33. }
34. else $json = strtolower(var_export( $data, true ));
36. return $json;
37. }
38. echo php_json_encode(array('first'=>'testing'));
39. ?>

中文的话，可以结合如下的函数来使用。

2. function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
3. {
4. foreach ($array as $key => $value) {
5. if (is_array($value)) arrayRecursive($array[$key], $function, $apply_to_keys_also);
6. else $array[$key] = $function($value);
8. if ($apply_to_keys_also && is_string($key)) { $new_key = $function($key); if ($new_key != $key) { $array[$new_key] = $array[$key]; unset($array[$key]); } }
9. }
10. }
11. ?>

调用示例：

2. function JSON($array) {
3. arrayRecursive($array, 'urlencode', true);
4. $json = jsonEncode($array); // 或者 $json = php_json_encode($array);
5. return urldecode($json);
6. }
8. echo JSON(array('first'=>'testing','second'=>'中文'));
9. ?>