3v4l.org

run code in 300+ PHP versions simultaneously
<?php $json_str = <<<TEXT { "Example": { "ExampleOne": { "rate": "0" }, "ExampleTwo": { "rate": "0" }, "ExampleThree": { "rate": "0" } } } TEXT; $json = json_decode($json_str, true); $keys = array_keys($json['Example']); print_r($keys);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14
Array ( [0] => ExampleOne [1] => ExampleTwo [2] => ExampleThree )
preferences:
179.06 ms | 407 KiB | 5 Q