[英]Validation in my registration form is not working
我使用PDO在php中創建了一個簡單的注冊表單,以存儲在后端。 當我輸入空格鍵時,它將在后端視為空白字段,如果我未輸入任何內容,則不會顯示任何錯誤消息。
<?php
session_start();
$errmsg_arr = array();
$errflag = false;
// configuration
$dbhost = "localhost";
$dbname = "pdo_ret";
$dbuser = "root";
$dbpass = "";
// database connection
$conn = new PDO("mysql:host=$dbhost;dbname=$dbname",$dbuser,$dbpass);
// new data
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$age = $_POST['age'];
if($fname == '') {
$errmsg_arr[] = 'You must enter your First Name';
$errflag = true;
}
if($lname == '') {
$errmsg_arr[] = 'You must enter your Last Name';
$errflag = true;
}
if($age == '') {
$errmsg_arr[] = 'You must enter your Age';
$errflag = true;
}
if($errflag) {
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
session_write_close();
header("location: index.php");
exit();
}
// query
$sql = "INSERT INTO members (fname,lname,age) VALUES (:sas,:asas,:asafs)";
$q = $conn->prepare($sql);
$q->execute(array(':sas'=>$fname,':asas'=>$lname,':asafs'=>$age));
header("location: index.php");
?>
如果僅包含空格的字符串是錯誤的字符串,則應使用trim
函數:
if(trim($fname) == '') {
$errmsg_arr[] = 'You must enter your First Name';
$errflag = true;
}
if(trim($lname) == '') {
$errmsg_arr[] = 'You must enter your Last Name';
$errflag = true;
}
if(trim($age) == '') {
$errmsg_arr[] = 'You must enter your Age';
$errflag = true;
}
您應該使用修整功能,但在分配$ _POST數據時不得使用
代替:
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$age = $_POST['age'];
您應該具有以下代碼:
$fname = trim($_POST['fname']);
$lname = trim($_POST['lname']);
$age = trim($_POST['age']);
否則,您會將可能帶有白色字符的數據放入數據庫中,並且將來會引起問題。
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