In PHP, the file_get_contents function obtains UTF-8 with BOM, and then the json_decode () returns null.

In PHP, the file_get_contents function obtains UTF-8 with BOM, and then the json_decode () returns null. The problem is: how to parse json data in a file using php and return null.

{"a":1,"b":2,"x":[{"c":3},{"d":4},{"e":5}]}

The file_get_contents function is used to read files.

        $json = '{"a":1,"b":2,"x":[{"c":3},{"d":4},{"e":5}]}';        var_dump(json_decode($json));        var_dump(json_decode($json, true));

If you read the json string directly in php, there is no error. how can you read the json string from a file.

The following results are obtained:

PHP: json_decode-Manual

Http://www.php.net/manual/zh/function.json-decode.php

Php returns NULL using json_decode? Server O & M and Web architecture

Http://www.nginx.cn/337.html

Php json_decode null-toeasy-blog

Http://www.cnblogs.com/Toeasy/archive/2012/04/09/2439688.html

Json_decode () returns null-night-Yes-PHPChina-Powered by Discuz!
Http://bbs.phpchina.com/thread-267593-1-1.html

When obtaining the UTF-8 file content with BOM, use the file_get_contents function in PHP5.-wanglianghuaihua logs-NetEase Blog
Http://wanglianghuaihua.blog.163.com/blog/static/54251531201091915210555/

The key result is the following two. The reason for json_decode () parsing null is that the json file is in UTF-8 format with BOM.

The corrected code is as follows, which can be parsed properly.

$ DmText = file_get_contents (AROOT. 'data '. DS. 'dmtype. json. php '); if (preg_match ('/^ \ xEF \ xBB \ xBF/', $ dmText) {$ dmText = substr ($ dmText, 3 );} // trim $ dmText = t ($ dmText); echo $ dmText;/* create array list from comments */$ dmList = json_decode ($ dmText, true ); // If this parameter is set to TRUE, array instead of object is returned. Var_dump ($ dmList );

Display result:

View Code

{"Success": "true", "total": "4", "items": [{"id": "1", "c": "asdaEG ", "tb": "dm_suppliertype", "cn": "supplier type", "tips": "supplier type" },{ "id": "2", "c ": "adsafR", "tb": "suppliertype2", "cn": "supplier type 2", "tips": "supplier type" },{ "id ": "3", "c": "ada222", "tb": "suppliertype3", "cn": "supplier Type 3", "tips": "supplier type "}, {"id": "4", "c": "23 jetG", "tb": "suppliertype4", "cn": "supplier Type 4", "tips ": "Supplier type"}]} array (3) {["success"] => string (4) "true" ["total"] => string (1) "4" ["items"] => array (4) {[0] => array (5) {["id"] => string (1) "1" ["c"] => string (6) "asdaEG" ["tb"] => string (15) "dm_suppliertype" ["cn"] => string (15) "supplier type" ["tips"] => string (15) "Supplier type"} [1] => array (5) {["id"] => string (1) "2" ["c"] => string (6) "adsafR" ["tb"] => string (13) "suppliertype2" ["cn"] => string (16) "Supplier type 2" ["tips"] => string (15) "supplier type"} [2] => array (5) {["id"] => string (1) "3" ["c"] => string (6) "ada222" ["tb"] => string (13) "suppliertype3" ["cn"] => string (16) "supplier Type 3" ["tips"] => string (15) "Supplier type"} [3] => array (5) {["id"] => string (1) "4" ["c"] => string (6) "23 jetG" ["tb"] => string (13) "suppliertype4" ["cn"] => string (16) "supplier Type 4" ["tips"] => string (15) "supplier type "}}}