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我需要一些幫助來理解mysql的插入和更新方法。我正在運行Mamp，我知道php和mysql正在工作。我的數據庫設置的方式是在信息表中有一個鍵。數據被加密到數據庫中，並在顯示到passbook.html時解密。目前數據可以更新，但如果更改了用戶名或密碼，則會將新條目放入數據庫中，而不是更新它。我該如何解決這個問題才能進行數據更新。如果更改了密碼或用戶名，則應該進行更新。如果網站被更改，它應該創建一個新條目並刪除舊條目。Mysql插入和更新
passbook.html
<!DOCTYPE html>
<html>
<head>
<title>Passbook</title>
</head>
<body >
<header>
<h1> My Passbook</h1></header>
</header>
<body>
<?php
$count = 1;
?>
<style>
#pass a{
visibility:hidden;
}
#pass:hover a{
visibility:visible;
}
td{
text-align:center;
}
</style>
<script type="text/javascript">
function checkBox(checkbox){
if(checkbox.checked)
checkbox.value = 'Yes';
else
checkbox.value = 'No';
}
function addRow(){
var table = document.getElementById('table');
var row = table.insertRow(-1);
var count = document.getElementById('table').rows.length - 1;
row.innerHTML="<td name='row' value='"+count+"'>"+count+"</td>"
+ "<td><input name='" + count + "check' type='checkbox' value=''></input></td>"
+ "<td><input name='" + count + "web' type='text'></input></td>"
+ "<td><input name='" + count + "user' type='text'></input></td>"
+ "<td><input name='" + count + "pass' type='text'></input></td>";
document.getElementById('custom').value = count;
}
</script>
<form method="post" action="passbook.php">
<table id="table" border=5;>
<th>Row #</th>
<th>Selected</th>
<th>Websites</th>
<th>Usernames</th>
<th>Passwords</th>
<?php
session_start();
$connection = mysql_connect('localhost', $_SESSION['username'], $_SESSION['password']) or die ("Could not connect");
$key = mysql_query('SELECT `key` FROM `'.$_SESSION['username'].'`.`info`');
$string = 'SELECT * FROM `'.$_SESSION['username'].'`.`passbook` WHERE 1';
$result = mysql_query($string);
while($row = mysql_fetch_assoc($result))
{
$decUser = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($row['username']), MCRYPT_MODE_CBC, md5(md5($key))), "\0");
$decPass = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($row['password']), MCRYPT_MODE_CBC, md5(md5($key))), "\0");
if($row['selected'] == 1)
echo "<tr><td style='text-align:center;' value='".$count."'>".$count."</td>
<td><input type='checkbox' name='".$count."check' value='1' checked></td>
<td><input type='text' name='".$count."web' value='".$row['website']."'><br></td>
<td id='user'><a><input type='text' name='".$count."user' value='".$decUser."'></a></td>
<td id='pass'><a><input type='text' name='".$count."pass' value='".$decPass."'></a></td>
</tr>";
else if($row['selected'] == 0)
echo "<tr><td style='text-align:center;' value='".$count."'>".$count."</td>
<td><input type='checkbox' name='".$count."check' value='0'></td>
<td><input type='text' name='".$count."web' value='".$row['website']."'><br></td>
<td id='user'><a><input type='text' name='".$count."user' value='".$decUser."'></a></td>
<td id='pass'><a><input type='text' name='".$count."pass' value='".$decPass."'></a></td>
</tr>";
$count++;
}
?>
</table>
<br/>
<input type="button" value="Add row" id="AddRow" onclick="addRow()"></input>
<input type="submit" value="Save Table"></input>
</form>
<br/><br/>
<label id="yes"></label>
<script type="text/javascript">
function GotoPage()
{
var loc = document.getElementById('scroller').value;
if(loc!="0")
window.location = loc;
}
</script>
<select id="scroller" style="height:42px; width:145px;" onchange="GotoPage()" >
<optgroup label="Home">
<option value="homepage.html">Home</option>
</optgroup>
<optgroup label="View Credentials" >
<option value="passbook.html" selected>Passbook</option>
</optgroup>
<optgroup label="Other" >
<option value="settings.html" >Settings</option>
</optgroup>
</select>
</body></html>
passbook.php
session_start();
$connection = mysql_connect('localhost', $_SESSION['username'], $_SESSION['password']) or die ("Could not connect");
$db = mysql_select_db($_SESSION['username'],$connection);
$num = 0;
foreach ($_POST as $data => $value){
$num = substr($data, 0 , 1);
}
$string = "SELECT `key` FROM `info`";
$key = mysql_query($string) or die("failureeee");
for($i = 1; $i <= $num; $i++){
$username = $_POST[$i.'user'];
$password = $_POST[$i.'pass'];
$encUser = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), substr($username,strlen($i)-1), MCRYPT_MODE_CBC, md5(md5($key))));
$encPass = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), substr($password,strlen($i)-1), MCRYPT_MODE_CBC, md5(md5($key))));
$website = $_POST[$i.'web'];
echo "Encrypt" . "<br>" . $_POST[$i.'check'] . " " . $website . " " . $encUser. " " . $encPass . "<br>";
if(isset($_POST[$i.'check'])){
$q = "SELECT * FROM `passbook` WHERE `website`='".$website."'";
$select = mysql_query($q);
while($info = mysql_fetch_assoc($select)){
if($info == $website){
$query = "UPDATE `passbook` SET `selected` = '1',`username` = '".$encUser."',`password`='".$encPass."' WHERE `website`='".$website."'";
$run = mysql_query($query);
}
}
if(!isset($query)){
$query = "INSERT INTO `passbook` (`selected`,`website`,`username`,`password`) VALUES ('1','".$website."','".$encUser."','".$encPass."')";
$run = mysql_query($query);
echo "<br>INSERT web=".$website."<br>";
}
}
else{
$q = "SELECT `website` FROM `".$_SESSION['username']."`.`passbook`";
$select = mysql_query($q);
while($info = mysql_fetch_assoc($select)){
if($info == $website){
$q2 = "UPDATE `passbook` SET `selected` = '0',`username` = '".$encUser."',`password`='".$encPass."' WHERE `website`='".$website."'";
}
}
if(!isset($q2)){
$run = mysql_query($q2);
}
else{
$q2 = "INSERT INTO `passbook` (`selected`,`website`,`username`,`password`) VALUES ('0','".$website."','".$encUser."','".$encPass."')";
$run = mysql_query($q2);
}
}
}
謝謝。你會推薦什麼作爲加密方案？ – CrazyJohnny