如果條件變量存在於第一個條件，則跳過另一個條件

Question

我發現只有第一個條件在其內部存在相同變量時才被讀取，如果條件存在，則跳過另一個條件。如何解決它？

<select name='selectcriteria' class="form-control" multiple> 
<option value="education">Education</option> 
<option value="orphan">Orphan</option> 
<option value="madrasah">Madrasah</option> 
<option value="scholarship">Scholarship</option> 
<option value="socialwalfare">Social Walfare</option> 
</select> 

If(isset($_GET['selectcriteria'])){ 
$criteria=$_GET['selectcriteria']; 



if($criteria=='education'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria ='education'"; 
} 
else if($criteria=='madrasah'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah'"; 
} 
else if($criteria=='orphan'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'orphan'"; 
} 
else if($criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'scholarship'"; 
} 
else if($criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'socialwalfare'"; 
} 
else if($criteria=='education'&&$criteria=='madrasah'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria ='education' OR criteria = 'madrasah'"; 
} 
else if($criteria=='education'&&$criteria=='orphan'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria= 'orphan'"; 
} 
else if($criteria=='education'&&$criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'scholarship'"; 
} 
else if($criteria=='education'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'socialwalfare'"; 
} 
else if($criteria=='education'&&$criteria=='madrasah'&&$criteria=='orphan'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'madrasah' OR criteria = 'orphan'"; 
} 
else if($criteria=='education'&&$criteria=='madrasah'&&$criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'madrasah' OR criteria = 'scholarship'"; 
} 
else if($criteria=='education'&&$criteria=='madrasah'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'madrasah' OR criteria = 'socialwalfare'"; 
} 
else if($criteria=='education'&&$criteria=='madrasah'&&$criteria=='socialwalfare'&&$criteria=='orphan'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'education' OR criteria = 'madrasah' OR criteria = 'socialwalfare' OR criteria= 'orphan'"; 
} 
else if($criteria=='madrasah'&&$criteria=='orphan'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR criteria = 'orphan'"; 
} 
else if($criteria=='madrasah'&&$criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR criteria = 'scholarship'"; 
} 
else if($criteria=='madrasah'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR citeria = 'socialwalfare'"; 
} 
else if($criteria=='madrasah'&&$criteria=='orphan'&&$criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR criteria = 'orphan' OR criteria = 'scholarship'"; 
} 
else if($criteria=='madrasah'&&$criteria=='orphan'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR criteria = 'orphan' OR criteria ='socialwalfare'"; 
} 
else if($criteria=='madrasah'&&$criteria=='scholarship'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'madrasah' OR criteria = 'scholarship' OR criteria='socialwalfare'"; 
} 
else if($criteria=='orphan'&&$criteria=='scholarship'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'orphan' OR criteria = 'scholarship'"; 
} 
else if($criteria=='orphan'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'orphan' or criteria = 'socialwalfare'"; 
} 
else if($criteria=='orphan'&&$criteria=='scholarship'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'orphan' OR criteria = 'scholarship' OR criteria = 'socialwalfare'"; 
} 
else if($criteria=='scholarship'&&$criteria=='socialwalfare'){ 
$sqlselect="SELECT * FROM criteria WHERE criteria = 'scholarship' OR criteria = 'socialwalfare'"; 
} 

$resultselect = mysqli_query($conn, $sqlselect); 

當在顯示狀態的同時，僅與任何第一條件相匹配的數據出現了，而其它值被跳過，不讀出。例如，如果我多選教育和獎學金，url中的變量應該執行selectcriteria = education & selectcriteria =獎學金。但是，隨着另一個值與條件匹配，一個值會被跳過。

Answer 1

既然你會得到多個值，因爲它是一個多選，你可以使用它像這樣：

$selected = $_GET['selectcriteria']; 
$values = explode(',', $selected); 
foreach($values as $criteria) { 
    $sqlselect[] = "criteria ='" . $criteria . "'"; 
} 

$sqlselect = implode(' OR ', $sqlselect); 

$query = "SELECT * FROM criteria WHERE 1 AND ($sqlselect); 

選項2：

我相信，你可以使用IN條款了。

$selected = $_GET['selectcriteria']; 
$values = explode(',', $selected); 
$joinValues implode("' ", $values); 
$query = "SELECT * FROM criteria WHERE criteria in ('" . $joinValues . "'); 

Answer 2

我不熟悉PHP的語法，但像下面可以做：

有一個字符串，它說：=「SELECT * FROM標準其中（標準」

那麼無論值在「選擇」菜單中選擇您可以用它們來追加到上面，並最終定義字符串正確地關閉SQL字符串。

如果（==的SelectedValue ABC）{ 追加到字符串「ABC」 }

如果（的SelectedValue == XYZ）{ 追加到字符串 'XYZ' }

到底

與追加它 '）'