Php 包含数据库数据的数组

我需要通过从表中取出slug来组装阵列，例如：

$array = array (
   'esporte',
   'mundo',
   'estado'
);

我试着这样做：

$slug = $con->prepare("SELECT slug FROM categorias");
$slug->execute();
$array = array (
   foreach ( $slug as $row ) {
      echo "'.$row['slug'].',";
   }
);

$url = $_GET['url'];
$sep = array_filter ( explode ( "/", $url ) );
if ( isset ( $sep[0] ) && $sep[0] in_array ( $sep[0], $array ) ) {
   $Categoria = new Categoria;
   $Categoria->GetCategoria();
}

我需要使用此数组创建一个友好的url，如下所示：

$slug = $con->prepare("SELECT slug FROM categorias");
$slug->execute();
$array = array (
   foreach ( $slug as $row ) {
      echo "'.$row['slug'].',";
   }
);

$url = $_GET['url'];
$sep = array_filter ( explode ( "/", $url ) );
if ( isset ( $sep[0] ) && $sep[0] in_array ( $sep[0], $array ) ) {
   $Categoria = new Categoria;
   $Categoria->GetCategoria();
}