Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
-if (json_decode($json, true) !== null && json_last_error() === JSON_ERROR_NONE){
+if (json_validate($json, true)){
     echo 1;
 }
 
-if (json_decode(associative: true, json: $json) !== null && json_last_error() === JSON_ERROR_NONE){
+if (json_validate(associative: true, json: $json)){
     echo 1;
 }

PHP snippet to change

<?php

if (json_decode($json, true) !== null && json_last_error() === JSON_ERROR_NONE){
    echo 1;
}

if (json_decode(associative: true, json: $json) !== null && json_last_error() === JSON_ERROR_NONE){
    echo 1;
}

Applied Rules:

JsonValidateRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\Php83\Rector\BooleanAnd\JsonValidateRector;

return RectorConfig::configure()
    ->withRules([
        JsonValidateRector::class
    ])
	;

Rector version: 5b90a0 - released at 2026-01-30 23:38