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This article is about how to solve the problem of json_decode null in php7. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Specific problem description:

1. Confirm that the file does not have a BOM header

2. Try the following ways to remove illegal strings, but still output NULL

$some_string = htmlspecialchars_decode ($some_string); $some_string = preg_replace ("/\ t /", "", $some_string); $some_string = preg_replace ("/\ n /",'', $some_string); $some_string = str_replace ("\ n",'', $some_string); $some_string = str_replace ('\ n', $some_string)

3. Json_last_error () output 4 Syntax error, malformed JSON

4. Output the string directly, and the browser can parse the josn normally, as shown in the following screenshot

Solution:

Because your string is not a standard JSON string, the standard JSON string uses "cause" for every string type.

Test code

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