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run code in 300+ PHP versions simultaneously
<?php $arr = ['a' => 'abc']; $add = ['b' => 'bar', 'a' => 'foo']; echo json_encode(array_merge($arr, count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode(array_replace($arr, count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode($arr + (count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode((count($add) > 1 ? $add : []) + $arr); echo "\n---\n"; echo json_encode([...$arr, ...count($add) > 1 ? $add : []]); echo "\n---\n"; echo json_encode([...count($add) > 1 ? $add : [], ...$arr]);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
{"a":"foo","b":"bar"} --- {"a":"foo","b":"bar"} --- {"a":"abc","b":"bar"} --- {"b":"bar","a":"foo"} --- {"a":"foo","b":"bar"} --- {"b":"bar","a":"abc"}
Output for 8.0.1 - 8.0.30
{"a":"foo","b":"bar"} --- {"a":"foo","b":"bar"} --- {"a":"abc","b":"bar"} --- {"b":"bar","a":"foo"} --- Fatal error: Uncaught Error: Cannot unpack array with string keys in /in/jhXEW:23 Stack trace: #0 {main} thrown in /in/jhXEW on line 23
Process exited with code 255.
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