rfc:json_throw_on_error

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rfc:json_throw_on_error [2017/09/10 01:27]
ajf clarify reasoning
rfc:json_throw_on_error [2017/10/22 18:44] (current)
ajf implement
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 ====== PHP RFC: JSON_THROW_ON_ERROR ====== ====== PHP RFC: JSON_THROW_ON_ERROR ======
-  * Version: 1.0+  * Version: 1.0.2
   * Date: 2017-09-10   * Date: 2017-09-10
   * Author: Andrea Faulds   * Author: Andrea Faulds
-  * Status: Under Discussion+  * Status: Implemented (PHP 7.3)
   * First Published at: http://wiki.php.net/rfc/json_throw_on_error   * First Published at: http://wiki.php.net/rfc/json_throw_on_error
  
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 ===== Proposal ===== ===== Proposal =====
-This RFC instead proposes adding a new option flag value for <php>json_decode()</php> and <php>json_encode()</php>, <php>JSON_THROW_ON_ERROR</php>. When passed this flag, the error behaviour of these functions is changed. Instead of setting the global error state, they throw a <php>JsonException</php> with the message and code set to whatever <php>json_last_error()</php> and <php>json_last_error_msg()</php> would otherwise be respectively.+This RFC instead proposes adding a new option flag value for <php>json_decode()</php> and <php>json_encode()</php>, <php>JSON_THROW_ON_ERROR</php>. When passed this flag, the error behaviour of these functions is changed. The global error state is left untouched, and if an error occurs that would otherwise set itthese functions instead throw a <php>JsonException</php> with the message and code set to whatever <php>json_last_error()</php> and <php>json_last_error_msg()</php> would otherwise be respectively. <php>JSON_PARTIAL_OUTPUT_ON_ERROR</php> would override and disable <php>JSON_THROW_ON_ERROR</php>, so that generic wrapper functions that always pass the <php>JSON_PARTIAL_OUTPUT_ON_ERROR</php> flag continue to support <php>JSON_PARTIAL_OUTPUT_ON_ERROR</php>.
  
 <php>JsonException</php> would be a new class that subclasses <php>Exception</php>. <php>JsonException</php> would be a new class that subclasses <php>Exception</php>.
  
-At the present time, there would be no change to the default error behaviour. It would be worthwhile considering whether to eventually deprecate not using <php>JSON_THROW_ON_ERROR</php>, however.+Note that when given an invalid depth parameter, <php>json_decode()</php> outputs a warning and returns NULL. This behaviour is unaffected by <php>JSON_THROW_ON_ERROR</php> because it does not affect the global error state at present, has no corresponding error code to throw an exception with, and is not dependent on user input. Similarly, parameter parsing errors continue to produce warnings (when not in strict mode) because their error behaviour cannot be conditioned on the value of a parameter being parsed. Both can be caught by a user error handler that converts errors to exceptions. 
 + 
 +At the present time, there would be no change to the default error behaviour. It would be worthwhile considering whether to eventually slowly deprecate not using <php>JSON_THROW_ON_ERROR</php> and then change the default behaviourbut this RFC does not do this.
  
 ===== Backward Incompatible Changes ===== ===== Backward Incompatible Changes =====
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 As mentioned earlier, it may be desirable to deprecate the default behaviour eventually. As mentioned earlier, it may be desirable to deprecate the default behaviour eventually.
  
-===== Proposed Voting Choices ===== +===== Vote ===== 
-This is not a language change, merely a small addition to the JSON extension, so it only technically requires a 50%+1 majority.+This is not a language change, merely a small addition to the JSON extension, so it only technically requires a 50%+1 majority. However, it's a 2/3 vote. It is a simple Yes/No vote on whether to accept this RFC and merge the patch.
  
-It would be a simple Yes/No vote on whether to accept this RFC and merge the patch.+Voting started 2017-09-25 and ended 2017-10-05. 
 + 
 +<doodle title="Accept and merge JSON_THROW_ON_ERROR for PHP 7.3?" auth="ajf" voteType="single" closed="true"> 
 +   * Yes 
 +   * No 
 +</doodle>
  
 ===== Patches and Tests ===== ===== Patches and Tests =====
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 ===== Implementation ===== ===== Implementation =====
 +
 +Merged in PHP 7.3: https://github.com/php/php-src/commit/e823770515bd0530bd3c09ea273c720b4df33734
 +
 After the project is implemented, this section should contain  After the project is implemented, this section should contain 
-  - the version(s) it was merged to 
-  - a link to the git commit(s) 
   - a link to the PHP manual entry for the feature   - a link to the PHP manual entry for the feature
-  - a link to the language specification section (if any) 
  
 ===== References ===== ===== References =====
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 ===== Rejected Features ===== ===== Rejected Features =====
 Keep this updated with features that were discussed on the mail lists. Keep this updated with features that were discussed on the mail lists.
 +
 +===== Changelog =====
 +
 +  * v1.0.2 - change behaviour to leave global error flag untouched, rather than clearing it; note depth, param-parsing errors
 +  * v1.0.1 - cover details of the patch not previously mentioned
 +  * v1.0 - initial version
rfc/json_throw_on_error.1505006822.txt.gz · Last modified: 2017/09/22 13:28 (external edit)