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@ 2021-05-13T06:04:29Z

<?php

$_POST = ['nome' => 'Paolo'];

$default = ['nome' => '' ];

$_POST = array_replace( $default, $_POST );

$nome = $_POST['nome'];

echo $nome;

Output
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array_replace: documentation ( source)

preferences:dark modelive preview

46.84 ms | 402 KiB | 5 Q