在 PHP 7.4 中，json_decode 解码失败(返回 JSON 解码时最后发生的错误，不等于没有错误发生)的分析
1、当 basename: “collections” 时，解码成功。如图1
图1
2、当 basename: “collectiontitem” 时，解码失败。如图2
图2
3、查看 解码 的代码实现
1 2 3 4 5 6 7 8 9 10 11 | $result = json_decode($data, true);if (json_last_error() !== \JSON_ERROR_NONE) { $message = "Invalid json: $data".PHP_EOL; if (function_exists('json_last_error_msg')) { $message .= ': ' . json_last_error_msg(); } throw new \RuntimeException($message);} |
4、先分析成功的流程，打印 json_last_error()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | //var_dump($data);$result = json_decode($data, true);//var_dump($result);var_dump(json_last_error());if (json_last_error() !== \JSON_ERROR_NONE) { //dd(json_last_error()); $message = "Invalid json: $data".PHP_EOL; if (function_exists('json_last_error_msg')) { $message .= ': ' . json_last_error_msg(); } throw new \RuntimeException($message);} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0) |
5、再分析失败的流程，打印 json_last_error()，其中一次失败的值等于 4。如图3
图3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(0)int(4) |
6、打印当值为 4 时的 $data、$result
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | //var_dump($data);$result = json_decode($data, true);//var_dump($result);//var_dump(json_last_error());//exit;if (json_last_error() !== \JSON_ERROR_NONE) { var_dump($data); var_dump($result); var_dump(json_last_error()); exit; //dd(json_last_error()); $message = "Invalid json: $data".PHP_EOL; if (function_exists('json_last_error_msg')) { $message .= ': ' . json_last_error_msg(); } throw new \RuntimeException($message);} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | string(872) "{ "sections": { "collection": { "type": "collection", "settings": { "slug": "{{ $CollectionsSlug }}", "page": {{ Request::query('page') ?? '1' }} } }, "carousel": { "type": "carousel", "settings": { "color_scheme": "inverse", "loop": true, "autoplay": true, "interval": 10, "slidesPerView": 6 }, "blocks": { "slide-1": { "type": "slide", "settings": { } }, "slide-2": { "type": "slide", "settings": { } } } } }}"NULLint(4) |
7、当删除 “page”: {{ Request::query(‘page’) ?? ‘1’ }} 后，解析成功。最终分析得出原因在于 JSON_ERROR_SYNTAX 语法错误。如图4
图4
1 2 3 | if (json_last_error() === \JSON_ERROR_SYNTAX) { echo 'JSON_ERROR_SYNTAX';} |
8、编辑 $data，需要将 “page”: {{ Request::query(‘page’) ?? ‘1’ }} 替换为 “”page”: {{ Request::query(‘page’) ?? ‘1’ }}”。但是，page 的值类型为 int ，现在这样已经变化为了 string 类型。最为根本的解决方案应该是想办法运行程序，将其变化为 “page”: 1 才是。如图5
图5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | $result = json_decode($data, true);var_dump($data);var_dump($result);var_dump(json_last_error());if (json_last_error() !== \JSON_ERROR_NONE) { $message = "Invalid json: $data".PHP_EOL; if (function_exists('json_last_error_msg')) { $message .= ': ' . json_last_error_msg(); } throw new \RuntimeException($message);} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | string(838) "{ "sections": { "collection": { "type": "collection", "settings": { "slug": "{{ $CollectionsSlug }}", "page": "{{ Request::query('page') ?? '1' }}" } }, "carousel": { "type": "carousel", "settings": { "color_scheme": "inverse", "loop": true, "autoplay": true, "interval": 10, "slidesPerView": 6 }, "blocks": { "slide-1": { "type": "slide", "settings": { } }, "slide-2": { "type": "slide", "settings": { } } } } }}"array(1) { ["sections"]=> array(2) { ["collection"]=> array(2) { ["type"]=> string(10) "collection" ["settings"]=> array(2) { ["slug"]=> string(22) "{{ $CollectionsSlug }}" ["page"]=> string(35) "{{ Request::query('page') ?? '1' }}" } } ["carousel"]=> array(3) { ["type"]=> string(8) "carousel" ["settings"]=> array(5) { ["color_scheme"]=> string(7) "inverse" ["loop"]=> bool(true) ["autoplay"]=> bool(true) ["interval"]=> int(10) ["slidesPerView"]=> int(6) } ["blocks"]=> array(2) { ["slide-1"]=> array(2) { ["type"]=> string(5) "slide" ["settings"]=> array(1) { ["image"]=> } } ["slide-2"]=> array(2) { ["type"]=> string(5) "slide" ["settings"]=> array(1) { ["image"]=> } } } } }}int(0) |
![在 Postman 中，GET http://api.github-shuijingwan-yii2-app-advanced.localhost/v1/logs?filter[level]=4&filter[category][like]=api\behaviors\RequestLogBehavior&filter[prefix][like]=app-api&filter[log_time][gte]=1528090828&filter[log_time][lte]=1529564924.6648 ，200响应，空数组已经被自动转换为空对象，以保证字段格式的统一，GET http://api.github-shuijingwan-yii2-app-advanced.localhost/v1/logs/3](https://www.shuijingwanwq.com/wp-content/uploads/2018/06/16-520x245.png)
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