更改日期格式不起作用

Question

我想将日期格式从（ymd）更改为（dmy），但我有一个错误：警告：date_format（）期望参数1为DateTime，字符串在D：\中给出第124行的wamp \ www \ pharmacie \ vente \ index.php 调用堆栈

if(isset($_POST['date_vente'])) {
$VenteObject = $managerVente->getListParDate(date_format($_POST['date_vente'], 'd-m-y')) ; 
echo $_POST['date_vente'] ; 
}
else {
$VenteObject = $managerVente->getList() ;
}

这是请求

  public function getListParDate($date)
  {
    $vente = array();
    $q = $this->_db->prepare('SELECT * FROM vente where date="'.$date.'" ORDER BY id DESC ') or die(print_r($req->errorInfo()));
    $q->execute() ;

       while ($donnees = $q->fetch(PDO::FETCH_ASSOC))
    {
        $vente[] = new Vente($donnees);
    }
        return $vente;

  }

echo $ _POST [＆＃39; date_vente＆＃39;]; 给出y-m-d

Answer 1

documentation向您展示了如何使用DateTime类：

$date = new DateTime($_POST['date_venue']);
$new_date = $date->format('d-m-y');

$VenteObject = $managerVente->getListParDate($new_date) ; 
echo $new_date;