<?php function alterextension($dir,$oldext,$newext){ $dh = @opendir($dir)or exit("N�o pude abrir o arquivo (".$dir.")"); while(false !== ($filename=readdir($dh))){ if (substr($filename,-4) == $oldext){ $parts=explode('.',$filename); rename($dir.$filename,$dir.$parts[0].$newext); } } return 1; } $dir = "./imagens/"; //diretorio dos arquivos $oldext='.JPG'; //Coloca a extens�o a ser alterada $newext='.jpg'; //Coloca a extens�o final alterextension($dir,$oldext,$newext); ?>