How to solve the problem of parsing json returned by php server from app to null

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Data from the post,get on the app side or from other pages is usually in the form of an array. Because the array form is not easy to transfer, it is usually transferred to json and then sent. We thought that the sender json_encode () and the receiver json_decode () solved the problem, but it turns out that json_decode () is followed by NULL.

The general reaction is that one parameter "true" is missing, but when you go back, it is json_decode ($data,true); how can it be NULL? Is it coding, not ah, direct printing after receiving is in the form of a complete json string, in the online json parsing website, it can be parsed normally.

So what's going on? In fact, it is the problem of code translation.

You can use json_last_error_msg (); locate the problem

Correct parsing can be achieved using the following methods.

$data = stripslashes (html_entity_decode ($info)); / / $info is the passed json string

$data = json_decode ($data,TRUE)

At this point, $data is the parsed array!

The html_entity_decode () function converts HTML entities to characters.

The stripslashes () function removes the backslash.

You can also use these methods:

Solution 1:

Htmlspecialchars_decode ($str)

Solution 2:

Function removeBOM ($str) {

If (0 = strpos (bin2hex ($str), 'efbbbf')) {

Return substr ($data, 3)

}

Return $data

}

RemoveBOM ($str)

Solution 3:

Stripslashes (decodeUnicode ($str))

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