I was able to do the following.
I created a file and circled it on the server.
<?php
include "chama_bd.php";
$query = $mysqli->prepare("SELECT 'titulo', 'id' FROM 'noticias'");
$query->execute();
$slug= get_result($query);
$query->store_result();
while ( $r = array_shift( $slug) ) {
$titulo_a=$r['titulo'];
$id_a=$r['id'];
//Cria o slug
$slug = slugify($titulo_a);
//Checa se o slug existe no banco de dados, se existir adiciona um número sequencial a frente
$CheckSlug = $mysqli->query("SELECT * FROM 'noticias' WHERE 'slug' LIKE '".$slug."%'");
$numHits = $CheckSlug->num_rows;
if($numHits > 0){
$slug = $slug.'-'.$numHits;
}
$query = $mysqli->prepare('UPDATE 'noticias' SET 'slug'=? WHERE 'id'=?')or die($mysqli->error);
$query->bind_param('si', $slug, $id_a);
$query->execute();
}
?>
// FUNÇÃO PARA CRIAR SLUGS
function slugify($string) {
$string = preg_replace('/[\t\n]/', ' ', $string);
$string = preg_replace('/\s{2,}/', ' ', $string);
$list = array(
'Š' => 'S',
'š' => 's',
'Đ' => 'Dj',
'đ' => 'dj',
'Ž' => 'Z',
'ž' => 'z',
'Č' => 'C',
'č' => 'c',
'Ć' => 'C',
'ć' => 'c',
'À' => 'A',
'Á' => 'A',
'Â' => 'A',
'Ã' => 'A',
'Ä' => 'A',
'Å' => 'A',
'Æ' => 'A',
'Ç' => 'C',
'È' => 'E',
'É' => 'E',
'Ê' => 'E',
'Ë' => 'E',
'Ì' => 'I',
'Í' => 'I',
'Î' => 'I',
'Ï' => 'I',
'Ñ' => 'N',
'Ò' => 'O',
'Ó' => 'O',
'Ô' => 'O',
'Õ' => 'O',
'Ö' => 'O',
'Ø' => 'O',
'Ù' => 'U',
'Ú' => 'U',
'Û' => 'U',
'Ü' => 'U',
'Ý' => 'Y',
'Þ' => 'B',
'ß' => 'Ss',
'à' => 'a',
'á' => 'a',
'â' => 'a',
'ã' => 'a',
'ä' => 'a',
'å' => 'a',
'æ' => 'a',
'ç' => 'c',
'è' => 'e',
'é' => 'e',
'ê' => 'e',
'ë' => 'e',
'ì' => 'i',
'í' => 'i',
'î' => 'i',
'ï' => 'i',
'ð' => 'o',
'ñ' => 'n',
'ò' => 'o',
'ó' => 'o',
'ô' => 'o',
'õ' => 'o',
'ö' => 'o',
'ø' => 'o',
'ù' => 'u',
'ú' => 'u',
'û' => 'u',
'ý' => 'y',
'ý' => 'y',
'þ' => 'b',
'ÿ' => 'y',
'Ŕ' => 'R',
'ŕ' => 'r',
'/' => '-',
' ' => '-',
',' => '-',
'.' => '-',
"'" => '-',
';' => '',
'"' => '',
'!' => '',
'?' => '',
'º' => 'o',
'ª' => 'a',
'\'' => '',
'(' => '',
')' => '',
'R$' => '',
'|' => '',
'%' => '',
'¨' => '',
'&' => '',
'*' => '',
'@' => '',
'=' => '',
'+' => '',
);
$string = strtr($string, $list);
$string = preg_replace('/-{2,}/', '-', $string);
$string = strtolower($string);
return $string;
}// FIM DA FUNÇÃO QUE CRIA SLUGS