[英]Laravel : Undefined variable in blade?
在獲取未定義的變量時:在執行刀片視圖時在視圖中得分(視圖:C:\\ Users \\ Sarthak \\ blog \\ resources \\ views \\ submitquestion.blade.php):
控制器部分
public function question(Request $request)
{
static $startscore = 0;
$getidvalue = Input::get('getid');
$getanswervalue = Input::get('getanswer');
$dbscore = DB::table('5question')->select('question_id', 'correct_answer', 'question_marks')->where('question_id', '=', $getidvalue)->get();
foreach($dbscore as $value) {
if ($getanswervalue == ($value->correct_answer)) {
$getscore = $startscore + $value->question_marks;
}
elseif ($getanswervalue == null) {
$emptyvalue = - 1;
$getscore = $startscore + $emptyvalue;
}
else {
$novalue = 0;
$getscore = $startscore + $novalue;
}
}
echo "$getscore";
Session::push('getscoresession', $getscore);
$getsession = ['qid' => $getidvalue, 'answer' => $getanswervalue];
Session::push('answer', $getsession);
// return response()->json(['qid'=>$getidvalue,'answer'=>$getanswervalue]);
$score = array_sum(Session::get("getscoresession"));
// return view('submitquestion',compact('score'));
return view('submitquestion', ['score' => $score]);
}
葉片部分:
您已提交測驗,您的分數是:{{$ score}}>注銷試試這個:
return view('submitquestion', compact('score'));
您可以通過with和compact傳遞變量形式的控制器來查看:
$request->session()->put('getscoresession', $getscore);
$getsession = ['qid' => $getidvalue, 'answer' => $getanswervalue];
$request->session()->put('answer', $getsession);
if ($request->session()->has('getscoresession')) {
$score = array_sum($request->session()->get("getscoresession"));
}else{
$score = 0;
}
與使用:
$score= 10;
return view('submitquestion')->with('score',$score);
使用緊湊:
return view('submitquestion',compact('score'));
試試吧。 如果從控制器收到錯誤,則發送$ score = 10; 返回視圖('submitquestion')-> with([['score'=> $ score]);
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