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  1. <?php
  2. $colecao = [1, 3, 6, 9, 13];
  3. $soma = 0;
  4. for($i = 0, $j = count($colecao); $i < $j; $i++){
  5.     $soma += $colecao[$i];
  6. }
  7. echo $soma;
  8. ?>
Success #stdin #stdout 0.02s 82880KB
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https://ideone.com/kfcP7Y
Exemplo prático PHP: for
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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