我正试图通过PHP上传一个json文件。这是我所拥有的代码。

if( isset( $_POST[\'upload\'] )) {
    $target = "/";
    $target = $target . basename( $_FILES[\'upload\'][\'name\']) ;
    if(move_uploaded_file($_FILES[\'upload\'][\'tmp_name\'], $target))
    {
        echo "The file ". basename( $_FILES[\'uploadedfile\'][\'name\']). " has been uploaded";
    }
    else {
        echo "Sorry, there was a problem uploading your file.";
    }
}

我有一个浏览按钮和一个导入按钮，当我按下导入时，它什么也没说。

 echo \'<div class="wrap">\';
echo "<form action=\'\' method=\'post\' enctype=\'multipart/form-data\'><input type=\'file\' name=\'upload\' value=\'Upload\' id=\'upload\' /></form>";
echo \'</div>\';
echo \'<div class="wrap">\';
echo "<form action=\'\' method=\'post\'><input class=\'button-secondary\' type=\'submit\' name=\'import\' value=\'Import\' id=\'import\' /></form>";
echo \'</div>\';

这是按钮的代码。

你知道我该如何解决这个问题吗？