<?php
 
function gerarVencimentos(DateTime $dataInicial, array $intervalos): array {
    $datasVencimento = [];
 
    foreach ($intervalos as $dias) {
        $dataVencimento = clone $dataInicial;
        $dataVencimento->modify("+{$dias} days");
        $datasVencimento[] = $dataVencimento;
    }
 
    return $datasVencimento;
}
 
// Exemplo de uso
$dataInicial = new DateTime('2024-07-06');
$intervalos = [0, 30, 60, 90, 28, 42, 56];
 
$datasVencimento = gerarVencimentos($dataInicial, $intervalos);
 
foreach ($datasVencimento as $data) {
    echo $data->format('Y-m-d') . PHP_EOL;
}
 

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