json_encode() / json_decode() warnings

From: Date: Thu, 27 Jul 2017 15:41:22 +0000
Subject: json_encode() / json_decode() warnings
Groups: php.internals 
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Hi internals,

When using json_encode() and json_decode() it is required that you
manually check for errors after every call, eg:

```php
$data = json_decode("false");
if (json_last_error() !== JSON_ERROR_NONE) {
    throw new UnexpectedValueException(json_last_error_msg());
}
```

This isn't _that_ unusual in PHP, however normally in these situations a
warning would be raised. But the JSON functions only raise warnings in a
couple of scenarios, most issues are completely silent.

I wanted to begin a discussion around changing this, so that warnings are
raised for any issues during json_encode() and json_decode().

I have an implementation ready and I'm happy to draft an RFC if this
suggestion doesn't receive universal hatred.

Thanks for your time,
Craig


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