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  1. $titulos = [
  2.     'Notícia ÷ 2×2 äëïöü',
  3.     'Símbolo cachaça & foguete.com'
  4. ];
  5.  
  6. foreach($titulos as $titulo) {
  7.     $novo_titulo = preg_replace( 
  8.         ['#(?![A-Za-zÀ-ü.]).#i', '#[-]{1,}#i'], 
  9.         ['-', '-'], 
  10.         $titulo 
  11.     );
  12.  
  13.     echo $novo_titulo . PHP_EOL;
  14. }
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$titulos = [
    'Notícia ÷ 2×2 äëïöü',
    'Símbolo cachaça & foguete.com'
];

foreach($titulos as $titulo) {
    $novo_titulo = preg_replace( 
        ['#(?![A-Za-zÀ-ü.]).#i', '#[-]{1,}#i'], 
        ['-', '-'], 
        $titulo 
    );

    echo $novo_titulo . PHP_EOL;
}
https://ideone.com/e2KQMU
language:
PHP (php 7.3.5)
created:
3 years ago
visibility:
public

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