PHP RFC: is_json() function

• Version: 0.9
• Date: 2022-08-14
• Author: Juan Carlos Morales, dev.juan.morales@gmail.com
• Status: Draft
• First Published at: http://wiki.php.net/rfc/is_json

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This RFC introduces a new function called is_json() to validate if an string is a valid json-string.

- Disadvantages of using json_decode or other regex approach. - Reasons for this and projects emulating this with json_decode. - Use existing JSON parser in a more isolated way.

This RFC proposes a new function, that returns true if the given string is a valid json-string.

Function description, examples, technical strategy, current JSON parser, etc. ....

None, as this is a new function only.

is_json will no longer be available as a function name, could break potential userland implementations.

next PHP 8.x

This RFC has no impact on SAPIs, existing extensions, Opcache, etc.

- No open issues

- (To be defined)

- (To be defined)

- (To be done later after pushing to github)

- (To be done later) -- Links to external references, discussions or RFCs -- Links to major open-source projects emulating this function using json_decode -- Link to Stackoverflow pointing the question, which this proposed function satisfy the needs

- No rejected features currently.