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run code in 150+ php & hhvm versions
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<?php $ean = '123456789012'; echo strlen($ean); $diff = 13 - strlen($ean); echo ' - diff: '.$diff.'<br/>'; for($i=0;$i<$diff;$i++) { echo 'toto<br/>'; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
12 - diff: 1<br/>toto<br/>