![](/img/trans.png)
[英]How to compare value with column values in multiple table whose column names are same?
[英]how to compare the value in the same table in a different column
所以我有一個驗證表,由key_id,key_verification,confirm_key和key_status組成
這是client_verifycodez.php的sql進程,在這里我要比較key_verification和Confirm_key的值(如果它們相同)
需要更新sql,以便當客戶端從表單輸入密鑰時,它將作為Confirm_key輸入db。 所以我想將confirm_key的值與已經存在的key_verification進行比較
$sql1 = "UPDATE verification SET confirm_key = '".$confirm_key."' WHERE key_id ='".$id."'";
mysql_query($sql1);
$sql = ("SELECT * FROM verification WHERE key_verification = confirm_key");
$query = mysql_query($sql) or die ("Error: " . mysql_error());
$check = mysql_fetch_array($query);
if($check==true)
{
echo "<center>";
echo "Your key is invalid!";
echo "<br>";
echo "<a href=client_verifycodez.php>Back </a>";
echo "</center>";
}
else
{
header("Location: home.php");
}
所以我需要如何比較,以便當key_verification和Confirm_key相等時,它將轉到home.php或發出警報。 我認為我有SQL問題。
有人可以幫我嗎? 謝謝
mysql_num_rows()函數將返回現有行數
請始終使用mysqli擴展名
<?php
$sql = ("SELECT * FROM verification WHERE key_verification = confirm_key");
$query = mysql_query($sql) or die ("Error: " . mysql_error());
//get the number of result rows
$num_rows = mysql_num_rows($query);
//get the details
$check = mysql_fetch_array($query);
if($query)
{
if($num_rows>0)
{
echo "<center>";
echo "Your key is invalid!";
echo "<br>";
echo "<a href=client_verifycodez.php>Back </a>";
echo "</center>";
}
else
{
header("Location: home.php");
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.