<?php
header ('Content-type: text/html; charset=UTF-8');
$string = 'Av. 7 de setembro – Salvadorçáúàùí'; // String com o caracter que retorna erro
$string2 = 'Av. 7 de setembro - Salvador'; // String com o Hífen
$array = array('string' => $string, 'string2' => $string2);
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