回发不会自动填充 php 数组数据

Question

此页面有一个部分用于在父页面中编辑多行 "child" 数据。

"UPDATE" 按钮通过 php 数组成功将数据发送到回发事件中，我们成功接收并能够更新数据库。

唯一的问题是表单恢复显示原始数据。我怀疑我对变量做错了什么，它们在某种程度上不是同一个变量，但我不太确定。谁能发现我的错误？

<?php
require 'myheader.php'; // includes my db connection info
echo "<h2>Edit Children</h2>";
/*
this uses a multiline edit table to edit child info in place
and delete row buttons and and add button
*/
// initialize the child vars
$childid = '';
$subscribed = '';
$surname = '';
$firstname = '';
$commonname = '';
$othernames = '';
$dob = '';

// get the PARENT id from the session
$personid = $_SESSION['personid'];

if($personid === ""){
    echo "Please select a member first<br>";
}else{
    // Display the page
    $conn = new mysqli($servername, $username, $password, $dbname);
    if ($conn->connect_error) 
    {
        die("Connection failed: " . $conn->connect_error);
    }    
    echo "<hr><b>Member</b>";
    $sqldemographics = "select personid, active, gender, dob, surname, firstname, commonname, othernames from members where personid = '" . $personid . "'";
    //echo $sqldemographics . "<br>";
    $demographics = $conn->query($sqldemographics);
    if ($demographics->num_rows > 0) 
    {
        echo "<table border='1'>";
        echo "<tr><td><b>Surname</b></td><td><b>Common Name</b></td><td><b>First Name</b></td><td><b>Other Names</b></td><td><b>Date of Birth</b></td></tr>"; 
        // output data of each row
        while($row = $demographics->fetch_assoc()) {
            echo "<td>" . $row['surname'] . "</td><td>" . $row['commonname'] . "</td><td>" . $row['firstname'] . "</td><td>" . $row['othernames'] . "</td>";
            echo "<td>" . $row['dob'] . "</td>";
            echo "</tr>";  
        }
        echo "</table>";
    } else {
        echo "Unable to find matching member with personid: " . $personid . "<br>";
    }
    // done with MEMBER stuff

    // -------  Move on to CHILD stuff  ------------------------
    echo "<hr><b>Children</b>";
    $sqlchildren = "select * from children inner join guardians on guardians.childid = children.childid where guardians.personid = '" . $personid . "'";
    $children = $conn->query($sqlchildren);
    if ($children->num_rows > 0) 
    {
        // set up the form to display children AND allow edits
        echo "<form method='post' action='" . htmlspecialchars($_SERVER['PHP_SELF']) . "'>";
        echo "<table border='1'>";
        echo "<tr><td><b>Subscribed</b></td><td><b>Surname</b></td><td><b>First Name</b></td><td><b>Common Name</b></td><td><b>Other Names</b></td><td><b>Date of Birth</b></td></tr>";
        while($row = $children->fetch_array()) {
            // use input arrays
            echo "<tr>";
            echo "<td>".$row['issubscribed']."</td>"; // subscriptions is not editable on this page
            echo "<td><input type='text' name='surname[]' value='".$row['surname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='firstname[]' value='".$row['firstname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='commonname[]' value='".$row['commonname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='othernames[]' value='".$row['othernames']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='dob[]' value='".$row['dob']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='hidden' name='childid[]' value='".$row['childid']."' /></td>";
            echo "</tr>";
        }
        echo "<input type='submit' name='update' value='UPDATE' />";
        echo "</table>";
        echo "</form>";
    } else {
        echo "No associated child records found for " . $personname . "<br>";
    }

    echo "<a href='AddChild.php'>Add Children</a><br>";


    // ------ GET vs POST -----------------------------------------------
    if($_SERVER["REQUEST_METHOD"] == "GET"){
        // it's NOT a post back.

    }else{
        // it's a post back after editing child data into the form, so scrub and check the data
        // make sure it's the "update" button
        if(isset($_POST['update'])){
            // its (zero indexed) arrays of each COLUMN
            // since our algorithm is row based for the db insert it will have to explicitly index each array 

            // grab all the posted data into arrays
            $childid = $_POST['childid'];
            $subscribed = $_POST['subscribed'];
            $surname = $_POST['surname'];
            $firstname = $_POST['firstname'];
            $commonname = $_POST['commonname'];
            $othernames = $_POST['othernames'];
            $dob = $_POST['dob'];

            /*
            print_r($childid);
            echo "<br>";
            print_r($firstname); 
            echo "<br>";
            */

            // loop through the posted array of children
            $index = 0;
            foreach ($childid as $value => $ind_childid) {
                $ind_subscribed = $subscribed[$index];
                $ind_surname = $surname[$index];
                $ind_firstname = $firstname[$index];
                $ind_commonname = $commonname[$index];
                $ind_othernames = $othernames[$index];
                $ind_dob = $dob[$index];
                ++$index;           
                $sqlupdatechildren = "UPDATE children SET surname = '$ind_surname', firstname = '$ind_firstname', commonname = '$ind_commonname', othernames = '$ind_othernames', dob = '$ind_dob' WHERE childid = '$ind_childid'";
                echo "$sqlupdatechildren<br>";
                $conn->query($sqlupdatechildren); // insert the record          
            }   

            // !!! do we have to put the new data back into the form or something?

        } // end "update" button
    } // end postback section
    $conn->close();  //close database
}

require 'myfooter.php';
?>

提前致谢肯

Answer 1

您的代码正在查询数据库并使用结果构建 HTML 输出 ，然后 检测 POST 是否已完成并更新数据库。您需要调转处理顺序，以便首先完成 POST 处理，然后最后生成 HTML 输出。

Answer 2

为了完成，这里是固定代码：

<?php
require 'playgroundsheader.php';
echo "<h2>Edit Children</h2>";
/*
this uses a multiline edit table to edit child info in place
and delete row buttons and and add button
*/
// initialize the child vars
$childid = '';
$subscribed = '';
$surname = '';
$firstname = '';
$commonname = '';
$othernames = '';
$dob = '';

// get the PARENT id from the session
$personid = $_SESSION['personid'];

if($personid === ""){
    echo "Please select a member first<br>";
}else{
    // Display the page
    $conn = new mysqli($servername, $username, $password, $dbname);
    if ($conn->connect_error) 
    {
        die("Connection failed: " . $conn->connect_error);
    }    
    echo "<hr><b>Member</b>";
    $sqldemographics = "select personid, active, gender, dob, surname, firstname, commonname, othernames from members where personid = '" . $personid . "'";
    //echo $sqldemographics . "<br>";
    $demographics = $conn->query($sqldemographics);
    if ($demographics->num_rows > 0) 
    {
        echo "<table border='1'>";
        echo "<tr><td><b>Surname</b></td><td><b>Common Name</b></td><td><b>First Name</b></td><td><b>Other Names</b></td><td><b>Date of Birth</b></td></tr>"; 
        // output data of each row
        while($row = $demographics->fetch_assoc()) {
            echo "<td>" . $row['surname'] . "</td><td>" . $row['commonname'] . "</td><td>" . $row['firstname'] . "</td><td>" . $row['othernames'] . "</td>";
            echo "<td>" . $row['dob'] . "</td>";
            echo "</tr>";  
        }
        echo "</table>";
    } else {
        echo "Unable to find matching member with personid: " . $personid . "<br>";
    }
    // done with MEMBER stuff

    // -------  Move on to CHILD stuff  ------------------------

    // ------ GET vs POST -----------------------------------------------
    if($_SERVER["REQUEST_METHOD"] == "GET"){
        // it's NOT a post back.

    }else{
        // it's a post back after editing child data into the form, so scrub and check the data
        // make sure it's the "update" button
        if(isset($_POST['update'])){
            // its (zero indexed) arrays of each COLUMN
            // since our algorithm is row based for the db insert it will have to explicitly index each array 

            // grab all the posted data into arrays
            $childid = $_POST['childid'];
            $subscribed = $_POST['subscribed'];
            $surname = $_POST['surname'];
            $firstname = $_POST['firstname'];
            $commonname = $_POST['commonname'];
            $othernames = $_POST['othernames'];
            $dob = $_POST['dob'];

            /*
            print_r($childid);
            echo "<br>";
            print_r($firstname); 
            echo "<br>";
            */

            // loop through the posted array of children
            $index = 0;
            foreach ($childid as $value => $ind_childid) {
                $ind_subscribed = $subscribed[$index];
                $ind_surname = $surname[$index];
                $ind_firstname = $firstname[$index];
                $ind_commonname = $commonname[$index];
                $ind_othernames = $othernames[$index];
                $ind_dob = $dob[$index];
                ++$index;           
                $sqlupdatechildren = "UPDATE children SET surname = '$ind_surname', firstname = '$ind_firstname', commonname = '$ind_commonname', othernames = '$ind_othernames', dob = '$ind_dob' WHERE childid = '$ind_childid'";
                //echo "$sqlupdatechildren<br>";
                $conn->query($sqlupdatechildren); // insert the record          
            }   
        } // end "update" button
    } // end postback section

    echo "<hr><b>Children</b>";
    $sqlchildren = "select * from children inner join guardians on guardians.childid = children.childid where guardians.personid = '" . $personid . "'";
    $children = $conn->query($sqlchildren);
    if ($children->num_rows > 0) 
    {
        // set up the form to display children AND allow edits
        echo "<form method='post' action='" . htmlspecialchars($_SERVER['PHP_SELF']) . "'>";
        echo "<table border='1'>";
        echo "<tr><td><b>Subscribed</b></td><td><b>Surname</b></td><td><b>First Name</b></td><td><b>Common Name</b></td><td><b>Other Names</b></td><td><b>Date of Birth</b></td></tr>";
        while($row = $children->fetch_array()) {
            // use input arrays
            echo "<tr>";
            echo "<td>".$row['issubscribed']."</td>"; // subscriptions is not editable on this page
            echo "<td><input type='text' name='surname[]' value='".$row['surname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='firstname[]' value='".$row['firstname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='commonname[]' value='".$row['commonname']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='othernames[]' value='".$row['othernames']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='text' name='dob[]' value='".$row['dob']."' maxlength='32' size='10' /></td>";
            echo "<td><input type='hidden' name='childid[]' value='".$row['childid']."' /></td>";
            echo "</tr>";
        }
        echo "<input type='submit' name='update' value='UPDATE' />";
        echo "</table>";
        echo "</form>";
    } else {
        echo "No associated child records found for " . $personname . "<br>";
    }
    // This part calls playgroundsAddChild.php
    echo "<a href='playgroundsAddChild.php'>Add Children</a><br>";

    $conn->close();  //close database
}
require 'playgroundsfooter.php';
?>

回发不会自动填充 php 数组数据

postback not auto filling in with php array data

php

arrays

http

postback