Question

我建立了一个应用程序来预测商学院入学。我正在添加功能来更改计算器的输入，而无需重新开始。我有两个页面update_gmat.php和update_round.php。所有变量都在update_gmat.php上正确加载，但如果我在update_round.php上，然后再次更改Round并返回到update_round.php，那么Round会话变量将变为空白。我可以设置Round会话变量，它可以在第一次加载时工作但在我转到下一页时消失。我有大约25个会话变量，Round是唯一消失的。

这是update_gmat.php：

<?php

require_once "dbconnect2.php";
require_once "functions.php";

session_start();

$EMAIL = $_SESSION["EMAIL"];
$NEW_GMAT = $_POST["newGmat"];
$OLD_GMAT = $_SESSION["GMAT"];
$GPA = $_SESSION["GPA"];
$WORK = $_SESSION["WORK"];
$MAJOR = $_SESSION["MAJOR"];
$INDUSTRY = $_SESSION["INDUSTRY"];
$AGE = $_SESSION["AGE"];
$COUNTRY = $_SESSION["COUNTRY"];
$ROUND = $_SESSION["ROUND"];

$verify_variables =  verifyInputs($OLD_GMAT, $GPA, $WORK, $AGE, $EMAIL, TRUE);
$verify_gmat = verifyGMAT($NEW_GMAT);

if($verify_gmat == "True") {
if($verify_variables == "True") {

    $_SESSION["GMAT"] = $NEW_GMAT;

    $st_row = '<tr style="border-top: none; border-bottom: none;">';
    $st_cell = '<td style="border-top: none; border-bottom: none;">';
    $er = '</tr>';
    $ec = '</td>';

    echo '<table style="border-top: none; border-bottom: none;">
        <tbody style="border-top: none; border-bottom: none;">';
    echo $st_row . $st_cell . '<center>School</center>' . $ec;
    echo $st_cell . '<center>GMAT: ' . $NEW_GMAT . '</center>' . $ec;
    echo $st_cell . '<center>GMAT: ' . $OLD_GMAT . '</center>' . $ec . $er;

    if($_SESSION["HARVARD"]) {
        echo $st_row;
        echoCell("Harvard");
        echoCell(processHarvard($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processHarvard($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;        
    } 
    if($_SESSION["STANFORD"]) {
        echo $st_row;
        echoCell("Stanford");
        echoCell(processStanford($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processStanford($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["WHARTON"]) {
        echo $st_row;
        echoCell("Wharton");
        echoCell(processWharton($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processWharton($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["BOOTH"]) {
        echo $st_row;
        echoCell("Booth");
        echoCell(processBooth($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processBooth($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["SLOAN"]) {
        echo $st_row;
        echoCell("Sloan");
        echoCell(processSloan($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processSloan($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["KELLOGG"]) {
        echo $st_row;
        echoCell("Kellogg");
        echoCell(processKellogg($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processKellogg($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["HAAS"]) {
        echo $st_row;
        echoCell("Haas");
        echoCell(processHaas($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processHaas($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["COLUMBIA"]) {
        echo $st_row;
        echoCell("Columbia");
        echoCell(processColumbia($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processColumbia($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["TUCK"]) {
        echo $st_row;
        echoCell("Tuck");
        echoCell(processTuck($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processTuck($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["NYU"]) {
        echo $st_row;
        echoCell("NYU");
        echoCell(processNYU($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processNYU($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["ROSS"]) {
        echo $st_row;
        echoCell("Ross");
        echoCell(processRoss($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processRoss($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["YALE"]) {
        echo $st_row;
        echoCell("Yale");
        echoCell(processYale($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processYale($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["DARDEN"]) {
        echo $st_row;
        echoCell("Darden");
        echoCell(processDarden($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processDarden($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["DUKE"]) {
        echo $st_row;
        echoCell("Duke");
        echoCell(processDuke($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processDuke($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["CORNELL"]) {
        echo $st_row;
        echoCell("Cornell");
        echoCell(processCornell($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processCornell($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    if($_SESSION["MCCOMBS"]) {
        echo $st_row;
        echoCell("McCombs");
        echoCell(processDarden($NEW_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echoCell(processDarden($OLD_GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $ROUND));
        echo $er;
    }
    echo '</tbody>
        </table>';

    echo '<form action="update_gmat.php" method="post">';
    echo '<div style="margin-top: 15px">Update GMAT:</div>
                    <div><input type="text" name="newGmat" /></div>';
    echo '<input value="Change GMAT" type="submit"><br><br>';
    echo '</form>';

    echo '<form action="update_round.php" method="post">';
    echo '<div style="margin-top: 15px">Update Application Round:</div>
        <div><select name="newRound">
            <option value="Round 1">Round 1</option>
            <option value="Round 2">Round 2</option>
            <option value="Round 3">Round 3</option>
            <option value="Round 4">Round 4</option>
         </select></div> ';
    echo '<input value="Change Round" type="submit">';
    echo '</form>';
}
else
{
    echo "Email: " . $EMAIL . "<br>";
    echo "New GMAT: " . $NEW_GMAT . "<br>";
    echo "Old GMAT: " . $OLD_GMAT . "<br>";
    echo "GPA: " . $GPA . "<br>";
    echo "Work Exp: " . $WORK . "<br>";
    echo "Major: " . $MAJOR . "<br>";
    echo "Industry: " . $INDUSTRY . "<br>";
    echo "Age: " . $AGE . "<br>";
    echo "Country: " . $COUNTRY . "<br>";
    echo "Round: " . $ROUND . "<br>";

}
}
else
{
    echo $verify_gmat;

    echo 'You enterered a GMAT of "' . $NEW_GMAT . '"<br>';

    echo '<form action="update_gmat.php" method="post">';
    echo '<div style="margin-top: 15px">Enter Legitimate GMAT Score:</div>
                    <div><input type="text" name="newGmat" /></div>';
    echo '<input value="Change GMAT" type="submit"><br><br>';
    echo '</form>';

    echo '<form action="update_round.php" method="post">';
    echo '<div style="margin-top: 15px">Update Application Round:</div>
        <div><select name="newRound">
            <option value="Round 1">Round 1</option>
            <option value="Round 2">Round 2</option>
            <option value="Round 3">Round 3</option>
            <option value="Round 4">Round 4</option>
         </select></div> ';
    echo '<input value="Change Round" type="submit">';
    echo '</form>';
}

echo "<br><br>";
?>

我在update_round.php中添加了一堆echo语句，以查看会话变量何时具有值。这是update_round.php：

<?php

session_start();

require_once "dbconnect2.php";
require_once "functions.php";

echo "Session Round = " . $_SESSION["ROUND"] . "<br>";
echo "Email: " . $_SESSION["EMAIL"] . "<br>";
echo "GMAT: " . $_SESSION["GMAT"] . "<br>";
echo "GPA: " . $_SESSION["GPA"] . "<br>";
echo "Work Exp: " . $_SESSION["WORK"] . "<br>";
echo "Major: " . $_SESSION["MAJOR"] . "<br>";
echo "Industry: " . $_SESSION["INDUSTRY"] . "<br>";
echo "Age: " . $_SESSION["AGE"] . "<br>";
echo "Country: " . $_SESSION["COUNTRY"] . "<br>";

$EMAIL = $_SESSION["EMAIL"];
$GMAT = $_SESSION["GMAT"];
$GPA = $_SESSION["GPA"];
$WORK = $_SESSION["WORK"];
$MAJOR = $_SESSION["MAJOR"];
$INDUSTRY = $_SESSION["INDUSTRY"];
$AGE = $_SESSION["AGE"];
$COUNTRY = $_SESSION["COUNTRY"];
$OLD_ROUND = $_SESSION["ROUND"];
$NEW_ROUND = $_POST["newRound"];

echo "Session Round = " . $_SESSION["ROUND"] . "<br>";
echo "Old Round = " . $OLD_ROUND . "<br>";

$verify_variables =  verifyInputs($GMAT, $GPA, $WORK, $AGE, $EMAIL, TRUE);


if($verify_variables == "True") {

    echo "Session Round = " . $_SESSION["ROUND"] . "<br>";
    echo "New Round = " . $NEW_ROUND . "<br>";
    $_SESSION["ROUND"] = $NEW_ROUND;
    echo "New Round = " . $NEW_ROUND . "<br>";
    echo "Session Round = " . $_SESSION["ROUND"] . "<br>";

    $st_row = '<tr style="border-top: none; border-bottom: none;">';
    $st_cell = '<td style="border-top: none; border-bottom: none;">';
    $er = '</tr>';
    $ec = '</td>';

    echo '<table style="border-top: none; border-bottom: none;">
        <tbody style="border-top: none; border-bottom: none;">';
    echo $st_row;
    echo echoCell("School");
    echo echoCell($NEW_ROUND);
    echo echoCell($OLD_ROUND);
    echo $er;

    if($_SESSION["HARVARD"]) {
        echo $st_row;
        echoCell("Harvard");
        echoCell(processHarvard($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processHarvard($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;        
    } 
    if($_SESSION["STANFORD"]) {
        echo $st_row;
        echoCell("Stanford");
        echoCell(processStanford($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processStanford($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["WHARTON"]) {
        echo $st_row;
        echoCell("Wharton");
        echoCell(processWharton($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processWharton($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["BOOTH"]) {
        echo $st_row;
        echoCell("Booth");
        echoCell(processBooth($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processBooth($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["SLOAN"]) {
        echo $st_row;
        echoCell("Sloan");
        echoCell(processSloan($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processSloan($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["KELLOGG"]) {
        echo $st_row;
        echoCell("Kellogg");
        echoCell(processKellogg($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processKellogg($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["HAAS"]) {
        echo $st_row;
        echoCell("Haas");
        echoCell(processHaas($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processHaas($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["COLUMBIA"]) {
        echo $st_row;
        echoCell("Columbia");
        echoCell(processColumbia($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processColumbia($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["TUCK"]) {
        echo $st_row;
        echoCell("Tuck");
        echoCell(processTuck($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processTuck($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["NYU"]) {
        echo $st_row;
        echoCell("NYU");
        echoCell(processNYU($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processNYU($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["ROSS"]) {
        echo $st_row;
        echoCell("Ross");
        echoCell(processRoss($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processRoss($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["YALE"]) {
        echo $st_row;
        echoCell("Yale");
        echoCell(processYale($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processYale($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["DARDEN"]) {
        echo $st_row;
        echoCell("Darden");
        echoCell(processDarden($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processDarden($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["DUKE"]) {
        echo $st_row;
        echoCell("Duke");
        echoCell(processDuke($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processDuke($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["CORNELL"]) {
        echo $st_row;
        echoCell("Cornell");
        echoCell(processCornell($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processCornell($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    if($_SESSION["MCCOMBS"]) {
        echo $st_row;
        echoCell("McCombs");
        echoCell(processDarden($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $NEW_ROUND));
        echoCell(processDarden($GMAT, $GPA, $WORK, $MAJOR, $INDUSTRY, $AGE, $COUNTRY, $OLD_ROUND));
        echo $er;
    }
    echo '</tbody>
        </table>';

    echo '<form action="update_gmat.php" method="post">';
    echo '<div style="margin-top: 15px">Update GMAT:</div>
                    <div><input type="text" name="newGmat" /></div>';
    echo '<input value="Change GMAT" type="submit"><br><br>';
    echo '</form>';
    echo '<form action="update_round.php" method="post">';
    echo '<div style="margin-top: 15px">Update Application Round:</div>
        <div><select name="newRound">
            <option value="Round 1">Round 1</option>
            <option value="Round 2">Round 2</option>
            <option value="Round 3">Round 3</option>
            <option value="Round 4">Round 4</option>
         </select></div> ';
    echo '<input value="Change Round" type="submit">';
    echo '</form>';

    echo "Session Round = " . $_SESSION["ROUND"] . "<br>";    
}
else
{
    echo "Email: " . $EMAIL . "<br>";
    echo "GMAT: " . $GMAT . "<br>";
    echo "GPA: " . $GPA . "<br>";
    echo "Work Exp: " . $WORK . "<br>";
    echo "Major: " . $MAJOR . "<br>";
    echo "Industry: " . $INDUSTRY . "<br>";
    echo "Age: " . $AGE . "<br>";
    echo "Country: " . $COUNTRY . "<br>";
    echo "Round: " . $ROUND . "<br>";
}

echo "<br><br>";
?>

当我从计算器转到update_round.php时，它会在第一次加载时运行，然后圆形会话变量消失。当我从update_gmat.php转到update_round.php时，它在第一次加载时工作，然后圆形会话变量消失。一旦Round会话变量停止工作，即使我回到update_gmat.php并返回，它仍然无法工作。

在原始计算器中，我从HTML表单帖子中设置了回合：

$_SESSION["ROUND"] = $_POST["inputRound"];

以下是update_gmat.php到update_round.php的输出： output 1

以下是从update_round.php开始并返回update_round.php的输出： output 2

我已经谷歌搜索了这个没有运气的问题。任何帮助都会很棒。我很想在Stack Overflow上发帖，很抱歉如果我没有正确提交问题。我经常使用旧问题寻求帮助，但这是我第一次找不到有类似问题的人。

加载新页面时，只有一个会话变量中的一个消失

0 个答案: