这篇文章主要介绍了php格式化json函数,结合实例形式分析了php使用自定义函数实现json格式化的方法,涉及php数组转json、流程控制及字符串操作等技巧,需要的朋友可以参考下。

本文讲述了php格式化json函数的示例代码，分享给大家供大家参考，具体如下：

1. <?php
2. $arr = array("ret"=>0,"data"=>array('a' => 1, 'b' => '2', 'c' => 3, 'd' => 4, 'e' => 5));
3. $json = json_encode($arr);
4. /**
5. * Formats a JSON string for pretty printing
6. *
7. * @param string $json The JSON to make pretty
8. * @param bool $html Insert nonbreaking spaces and <br />s for tabs and linebreaks
9. * @return string The prettified output
10. */
11. function _format_json($json, $html = false) {
12. $tabcount = 0;
13. $result = '';
14. $inquote = false;
15. $ignorenext = false;
16. if ($html) {
17. $tab = "&nbsp;&nbsp;&nbsp;";
18. $newline = "<br/>";
19. } else {
20. $tab = "\t";
21. $newline = "\n";
22. }
23. for($i = 0; $i < strlen($json); $i++) {
24. $char = $json[$i];
25. if ($ignorenext) {
26. $result .= $char;
27. $ignorenext = false;
28. } else {
29. switch($char) {
30. case '{':
31. $tabcount++;
32. $result .= $char . $newline . str_repeat($tab, $tabcount);
33. break;
34. case '}':
35. $tabcount--;
36. $result = trim($result) . $newline . str_repeat($tab, $tabcount) . $char;
37. break;
38. case ',':
39. $result .= $char . $newline . str_repeat($tab, $tabcount);
40. break;
41. case '"':
42. $inquote = !$inquote;
43. $result .= $char;
44. break;
45. case '\\':
46. if ($inquote) $ignorenext = true;
47. $result .= $char;
48. break;
49. default:
50. $result .= $char;
51. }
52. }
53. }
54. return $result;
55. }
56. echo _format_json($json);
57. /*
58. {
59. "ret": 0,
60. "data": {
61. "a": 1,
62. "b": 2,
63. "c": 3,
64. "d": 4,
65. "e": 5
66. }
67. }
68. **/
69. ?>