[英]PHP IF/ELSE condition not working as expected
我正在嘗試實施多個條件,這些條件將檢查提案的狀態,並且僅在狀態代碼設置為1或5時才應執行特定的代碼。
由於某種原因,我在實施此程序時遇到了困難。 當前代碼中的邏輯是,如果投標狀態與1或5不匹配,則返回一條消息,否則執行下一個查詢。 當我僅指定一個數字(即1或5)時,它將正常工作。
我和if和else條件面臨的另一個問題是這部分:
if ($count == 1) {
$feedback = '<p class="text-danger"> You have already accepted an application. You cannot accept or apply for any others. If this is a mistake then please contact the supervisor concerned directly.</p>';
}
if ($count < 1) {
$status = $db_conx->prepare ("SELECT status_code FROM record WHERE student_record_id = :user_record_id AND proposal_id = :proposal");
$status->bindParam(':user_record_id', $user_record_id, PDO::PARAM_STR);
$status->bindParam(':proposal', $proposal, PDO::PARAM_STR);
$status->execute();
$proposalstatus = $status->fetchColumn();
if($proposalstatus != 1)
{
//echo $proposalstatus;
$feedback = '<p class="text-danger">The proposal is not at a status where it can be accepted</p>';
}
}
else {
當我分別運行每個部分時,這是可行的,但是當我嘗試將其放到if語句中時,它將失敗並且根本不檢查這些條件,而只是完成了更新數據庫並顯示成功消息的任務。
完整的代碼在這里:
try
{
$db_conx = new PDO("mysql:host=$mysql_hostname;dbname=$mysql_dbname", $mysql_username, $mysql_password);
$db_conx->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$username = $_SESSION['username'];
$sql = $db_conx->prepare("SELECT username, user_record_id FROM login_details
WHERE username = :username");
$sql->bindParam(':username', $username, PDO::PARAM_STR);
$sql->execute();
$user_record_id = $sql->fetchColumn(1);
$proposal = $_POST['proposal_id'];
$acceptCheck = $db_conx->prepare ("SELECT * FROM record WHERE student_record_id = :user_record_id AND status_code = 3");
$acceptCheck->bindParam(':user_record_id', $user_record_id, PDO::PARAM_STR);
$acceptCheck->execute();
$count = $acceptCheck->rowCount();
if ($count == 1) {
$feedback = '<p class="text-danger"> You have already accepted an application. You cannot accept or apply for any others. If this is a mistake then please contact the supervisor concerned directly.</p>';
}
if ($count < 1) {
$status = $db_conx->prepare ("SELECT status_code FROM record WHERE student_record_id = :user_record_id AND proposal_id = :proposal");
$status->bindParam(':user_record_id', $user_record_id, PDO::PARAM_STR);
$status->bindParam(':proposal', $proposal, PDO::PARAM_STR);
$status->execute();
$proposalstatus = $status->fetchColumn();
if($proposalstatus != 1 || 5) //status must be either 'Approved' code 1 or 'Held' code 5
{
//echo $proposalstatus;
$feedback = '<p class="text-danger">The proposal is not at a status where it can be accepted</p>';
}
}
else {
//Update all application records to 'Not available' when a proposal has been accepted
$updateOtherRecords = $db_conx->prepare("UPDATE record SET status_code = 8, last_updated = now()
WHERE proposal_id = :proposal");
$updateOtherRecords->bindParam(':proposal', $proposal, PDO::PARAM_STR);
$updateOtherRecords->execute();
//Update other applicationa for the user concerned to 'Rejected'
$updateUserRecord = $db_conx->prepare("UPDATE record SET status_code = 7, last_updated = now()
WHERE student_record_id = :user_record_id");
$updateUserRecord->bindParam(':user_record_id', $user_record_id, PDO::PARAM_STR);
$updateUserRecord->execute();
//Update the proposal concerned and assign it to the user
$update = $db_conx->prepare("UPDATE record SET status_code = 3, last_updated = now()
WHERE proposal_id = :proposal AND student_record_id = :user_record_id");
$update->bindParam(':user_record_id', $user_record_id, PDO::PARAM_STR);
$update->bindParam(':proposal', $proposal, PDO::PARAM_STR);
$update->execute();
$feedback = '<p class="text-success"> The proposal has been successfully accepted <span class="glyphicon glyphicon-ok"/></p>';
}
}
我真的需要知道如何對它進行排序,因為在此語句中我將大量使用if和else。 任何指導將不勝感激!
先感謝您!
您的條件並不互相排斥
if ($count < 1) {
some stuff
}
if ($count == 1) {
...
} else
... this code will execute when $count is *NOT* equal to 1,
which includes when it's LESS than 1, e.g. "< 1" is true here
}
也許你想要
if ($count == 1) {
} else if ($count < 1) {
} else {
}
這樣最終的else僅在$count >= 1
時運行
用提案狀態1或5替換您的條件
if(!($proposalstatus == 1 || $proposalstatus == 5)) {
$feedback = '<p class="text-danger">The proposal is not at a status where it can be accepted</p>';
}
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