我的网站上有一个“订阅”表单，我想在提交之前检查数据库中的每个条目，这里是我编码的表格，但我希望你的帮助来完成它。
表格代码
<div class="col-lg-8 col-md-12 col-sm-12 col-xs-12">
<h1> Subscribe </h1>
</div>
<div class="col-lg-4 col-lg-offset-2 col-md-12 col-sm-12 col-xs-12">
<form action="" method="post" class="inp_txt horizontal-form" enctype="multipart/form-data">
<?php echo $result;?>
<?php echo $error1;?>
<?php echo $error2;?>
<?php echo $error3;?>
<div class="form-group">
<label for="name"> Your Name: </label>
<input type="text" name="name" class="form-control" value="<?=(isset($name) ? $name : "")?>" placeholder="Please enter your name" required>
</div>
<div class="form-group">
<label for="phone"> Your Phone Number: </label>
<input type="number" name="phone" class="form-control" value="<?=(isset($phone) ? $phone : "")?>" placeholder="Please enter your valid phone number" required>
</div>
<div class="form-group">
<label for="email"> Your Email: </label>
<input type="email" name="email" class="form-control" value="<?=(isset($email) ? $email : "")?>" placeholder="Please enter your valid email address">
</div>
<div class="form-group">
<button type="submit" class="btn btn-info btn-md" name="subscribe" value="Subscribe me"> Subscribe me </button>
</div>
</form>
</div>
</div>
</div>
<?php
include ("include/header.php");
include ("include/side_bar.php");
//error_reporting(E_ALL);
//ini_set('display_errors', 'On');
?>
<?php
$result = "";
if(isset($_POST['subscribe'])) {
$name = $_POST['name'];
mysql_real_escape_string($name);
$email = $_POST['email'];
mysql_real_escape_string($email);
$phone = $_POST['phone'];
mysql_real_escape_string($phone);
$result = "";
$error1 = "";
$error2 = "";
$error3 = "";
$check_email = "SELECT * from data where email = '$email'";
$res_email = mysql_query($check_email) or die(mysql_error());
$check_phone = "SELECT * from data where phone = '$phone'";
$res_phone = mysql_query($check_phone) or die(mysql_error());
if (empty($_POST['name']) && empty($_POST['phone']) ) {
$error1 = "<div class='alert alert-warning'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Warning!</strong> Please fill all fields before submitting form!
</div>";
if ($res_phone >= 1) {
$error2 = "Phone already exist";
}
if ($res_email >= 1) {
$error3 = "Email already exist";
}
} else {
$qry = "INSERT into `data` (name, phone, email, src) VALUES ('$name','$phone','$email','subscribed')";
$res = mysql_query($qry) or die(mysql_error());
if ($res == 1 ) {
$result = "<div class='alert alert-info'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Success!</strong> Your information successfully saved and now you subscribed to get SMS and Emails :)
</div>";
} else {
$result = "<div class='alert alert-danger'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Error!</strong> There was an error in saving your information, You are not subscribed to receive emails and SMS yet :(
</div>";
}
}
} else {
// do noting
}
;?>
一旦我保存了这些代码，一旦执行了第一个IF语句，其他三个带有一个else语句的IF语句仍未执行。
答案 0 :(得分：0)
试试这样 `
$result = "";
if(isset($_POST['subscribe'])) {
$name = $_POST['name'];
mysql_real_escape_string($name);
$email = $_POST['email'];
mysql_real_escape_string($email);
$phone = $_POST['phone'];
mysql_real_escape_string($phone);
$result = "";
$error1 = "";
$error2 = "";
$error3 = "";
$error = false;
$check_email = "SELECT * from data where email = '$email'";
$res_email = mysql_query($check_email) or die(mysql_error());
$check_phone = "SELECT * from data where phone = '$phone'";
$res_phone = mysql_query($check_phone) or die(mysql_error());
if (empty($_POST['name']) && empty($_POST['phone']) ) {
$error1 = "<div class='alert alert-warning'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Warning!</strong> Please fill all fields before submitting form!
</div>";
$error = true;
}
if(!$error && $res_phone >= 1) {
$error2 = "Phone already exist";
$error = true;
}
if(!$error && $res_email >= 1) {
$error3 = "Email already exist";
$error = true;
}
if(!$error){
$qry = "INSERT into `data` (name, phone, email, src) VALUES ('$name','$phone','$email','subscribed')";
$res = mysql_query($qry) or die(mysql_error());
if ($res == 1 ) {
$result = "<div class='alert alert-info'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Success!</strong> Your information successfully saved and now you subscribed to get SMS and Emails :)
</div>";
} else {
$result = "<div class='alert alert-danger'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Error!</strong> There was an error in saving your information, You are not subscribed to receive emails and SMS yet :(
</div>";
}
}
} else {
// do noting
}
;?>`
答案 1 :(得分：0)
对所有字段都这样，因为如果查询成功运行或在数据库中找到任何记录，mysql_num_rows（）函数将给出大于0的整数值
$check_phone = "SELECT * from data where phone = '$phone'";
$res_phone = mysql_query($check_phone) or die(mysql_error());
$res_phone_count = mysql_num_rows($res_phone);
if ($res_phone_count > 0)
{
$error2 = "Phone already exist";
}
答案 2 :(得分：0)
警告mysql_query，mysql_fetch_array，mysql_connect等..扩展在PHP 5.5.0中已弃用，并且已在PHP 7.0.0中删除。 相反，应该使用MySQLi或PDO_MySQL扩展。
试试这个
//db connection
global $conn;
$servername = "localhost"; //host name
$username = "username"; //username
$password = "password"; //password
$mysql_database = "dbname"; //database name
//mysqli prepared statement
$conn = mysqli_connect($servername, $username, $password) or die("Connection failed: " . mysqli_connect_error());
mysqli_select_db($conn,$mysql_database) or die("Opps some thing went wrong");
$result = "";
if(isset($_POST['subscribe'])) {
$name = $_POST['name'];
mysqli_real_escape_string($name);
$email = $_POST['email'];
mysqli_real_escape_string($email);
$phone = $_POST['phone'];
mysqli_real_escape_string($phone);
$result = "";
$error1 = "";
$error2 = "";
$error3 = "";
$error = false;
//$check_email = "SELECT * from data where email = '$email'";
// $res_email = mysql_query($check_email) or die(mysql_error());
$stmt = $conn->prepare("SELECT * from data where email =?");
$stmt->bind_param('s',$email);
The argument may be one of four types:
i - integer
d - double
s - string
b - BLOB
//change it by respectively
$stmt->execute();
$get_result =$stmt->get_result();
$row_count_email= $get_result->num_rows;
//$row_count= $stmt->affected_rows;
$stmt->close();
//$check_phone = "SELECT * from data where phone = '$phone'";
//$res_phone = mysql_query($check_phone) or die(mysql_error());
$stmt1 = $conn->prepare("SELECT * from data where phone =?");
$stmt1->bind_param('s',$phone); //here data type change based on your db design
The argument may be one of four types:
i - integer
d - double
s - string
b - BLOB
//change it by respectively
$stmt1->execute();
$get_result1 =$stmt1->get_result();
$row_count_phone= $get_result1->num_rows;
//$row_count= $stmt1->affected_rows;
$stmt1->close();
if (empty($_POST['name']) && empty($_POST['phone']) ) {
$error1 = "<div class='alert alert-warning'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Warning!</strong> Please fill all fields before submitting form!
</div>";
$error = true;
}
if($row_count_phone >= 1) {
$error2 = "Phone already exist";
$error = true;
}
if($row_count_email >= 1) {
$error3 = "Email already exist";
$error = true;
}
if(!$error){
//$qry = "INSERT into `data` (name, phone, email, src) VALUES ('$name','$phone','$email','subscribed')";
//$res = mysql_query($qry) or die(mysql_error());
$stmt2 = $conn->prepare("INSERT into `data` (name, phone, email, src) VALUES (?,?,?,?)");
$stmt2->bind_param('ssss',$name,$phone,$email,'subscribed');
The argument may be one of four types:
i - integer
d - double
s - string
b - BLOB
//change it by respectively
$stmt2->execute();
//$get_result2 =$stmt2->get_result();
//$row_count= $get_result2->num_rows;
$row_count= $stmt2->affected_rows;
$stmt2->close();
$conn2->close();
if ($row_count >=1 ) {
$result = "<div class='alert alert-info'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Success!</strong> Your information successfully saved and now you subscribed to get SMS and Emails :)
</div>";
} else {
$result = "<div class='alert alert-danger'>
<a href='#' class='close' data-dismiss='alert' aria-label='close'>×</a>
<strong>Error!</strong> There was an error in saving your information, You are not subscribed to receive emails and SMS yet :(
</div>";
}
}
}
?>
并使用if条件为错误并导致形式否则抛出错误
<?php if($result){ echo $result; } ?>
<?php if($error1){ echo $error1; } ?>