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@ 2015-04-06T11:41:14Z

<?php
	echo preg_replace('/([^_]\w)(__)([^_]\w)/i', '$1.$3', 'aluno_pobre__casado__novata');

?>

Output
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preg_replace: documentation ( source)

preferences:dark modelive preview

52.2 ms | 402 KiB | 5 Q