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@ 2022-03-22T09:40:11Z

<?php

function test(string $a = NULL) {
    var_dump($a);
}

test(NULL);
test('a');

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

30.58 ms | 404 KiB | 5 Q