if条件错误。我试图生成5位随机编号，并验证随机编号和文本框值($_POST['otp1'])等于移动到thank.php页面，否则显示弹出错误。
我做了一切，如果文本框值和$otp值相等，它显示弹出消息。
otp.php
<form action="otp.php" method="post">
<label>Mobile :</label>
<input type="text" name="mobile" /> <br /><br />
<label>OTP :</label>
<input type="text" name="otp1" /> <br /><br />
<input type="submit" name="send" value="Verifiy" />
</form>
<?php
$otp = intval( "0" . rand(1,9) . rand(0,9) . rand(0,9) . rand(0,9) . rand(0,9) );
echo $otp;
if(isset($_POST['send']))
{
$mobile = $_POST['mobile'];
$otp_no = $_POST['otp1'];
if($otp_no != $otp) '' Condition not work
{
echo "<script>alert('Your OTP is Worng'); window.location.replace('"otp.php'");</script>";
}
else
{
header('Location: thank.php');
}
}
?>
当页面重新加载时，$otp重新生成。所以它永远不会匹配。试试-
sesstion_start();
if(isset($_POST['send']))
{
$mobile = $_POST['mobile'];
$otp_no = $_POST['otp1'];
if($otp_no !== $_SESSION['otp']) '' Check identical
{
echo "<script>alert('Your OTP is Worng');window.location.replace('"otp.php'");</script>";
}
else
{
unset($_SESSION['otp']); // Unset the otp in session
header('Location: thank.php');
}
} else {
$_SESSION['otp'] = intval( "0" . rand(1,9) . rand(0,9) . rand(0,9) . rand(0,9) . rand(0,9) );
echo $_SESSION['otp'];
}
问题是在表单提交时更改了otp代码。因此，您必须将otp代码存储在隐藏元素中，并将其与用户输入的otp值进行比较。
<?php
$otp = intval( "0" . rand(1,9) . rand(0,9) . rand(0,9) . rand(0,9) . rand(0,9) );
echo $otp;
?>
<form action="test1.php" method="post">
<label>Mobile :</label>
<input type="text" name="mobile" /> <br /><br />
<label>OTP :</label>
<input type="hidden" name="otp" value="<?=$otp?>" />
<input type="text" name="otp1" /><br /><br />
<input type="submit" name="send" value="Verifiy" />
</form>
<?php
//$otp = intval( "0" . rand(1,9) . rand(0,9) . rand(0,9) . rand(0,9) . rand(0,9) );
//echo $otp;
if(isset($_POST['send']))
{
$mobile = $_POST['mobile'];
$otp_no = $_POST['otp1'];
$otp = $_POST['otp'];
if($otp_no != $otp) // Condition not work
{
echo "<script>alert('Your OTP is Worng'); </script>";
}
else
{
echo "success";
}
}
?>