PHP发布在本地工作，但不在服务器上

Question

我可以将数据插入本地主机上的数据库，但是当我将其放在Web服务器上时，它将无法工作。我尝试添加php错误检查，但没有任何显示。我还打开了ini文件中的php错误检查，但它仍然为空。如何检查错误？

post.php

<?php {
$servername = "localhost";
$username = "meherghl";
$password = "Topper";
$dbname = "meherghl";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    // prepare sql and bind parameters
    $stmt = $conn->prepare("INSERT INTO cwb_coins (id, profileid, store, position, 
        nickname, contactnumber, machinecount, cutoffdate, coins, location, lastsubmission, rank, currentprize, leasestartdate, leasedaysremaining, monthlyrent, prepaymentamount, securitydeposit, paymentmethod, leaseenddate, leasenoticedate, prepaymentmonths, amountpaid, paymentoutstanding) 
        VALUES (:id,:profileid,:store,:position, :nickname,:contactnumber,:machinecount,:cutoffdate, :coins,:location,:lastsubmission,:rank,:currentprize,:leasestartdate,:leasedaysremaining,:monthlyrent,:prepaymentamount,:securitydeposit,:paymentmethod,:leaseenddate,:leasenoticedate,:prepaymentmonths,:amountpaid,:paymentoutstanding)");

    $stmt->bindParam(':id', $_POST['id']);
    $stmt->bindParam(':profileid', $_POST['profileid']);
    $stmt->bindParam(':store', $_POST['store']);
    $stmt->bindParam(':position', $_POST['position']);
    $stmt->bindParam(':nickname', $_POST['nickname']);
    $stmt->bindParam(':contactnumber', $_POST['contactnumber']);
    $stmt->bindParam(':machinecount', $_POST['machinecount']);
    $stmt->bindParam(':cutoffdate', $_POST['cutoffdate']);
    $stmt->bindParam(':coins', $_POST['coins']);
    $stmt->bindParam(':location', $_POST['location']);
    $stmt->bindParam(':lastsubmission', $_POST['lastsubmission']);
    $stmt->bindParam(':rank', $_POST['rank']);
    $stmt->bindParam(':currentprize', $_POST['currentprize']);
    $stmt->bindParam(':leasestartdate', $_POST['leasestartdate']);
    $stmt->bindParam(':leasedaysremaining', $_POST['leasedaysremaining']);
    $stmt->bindParam(':monthlyrent', $_POST['monthlyrent']);
    $stmt->bindParam(':prepaymentamount', $_POST['prepaymentamount']);
    $stmt->bindParam(':securitydeposit', $_POST['securitydeposit']);
    $stmt->bindParam(':paymentmethod', $_POST['paymentmethod']);
    $stmt->bindParam(':leaseenddate', $_POST['leaseenddate']);
    $stmt->bindParam(':leasenoticedate', $_POST['leasenoticedate']);
    $stmt->bindParam(':prepaymentmonths', $_POST['prepaymentmonths']);
    $stmt->bindParam(':amountpaid', $_POST['amountpaid']);
    $stmt->bindParam(':paymentoutstanding', $_POST['paymentoutstanding']);

    $stmt->execute();


    }
catch(PDOException $e)
    {

    }
$conn = null;
}

?>