我在php中创建了一个简单的注册表单,使用PDO存储在后端。当我输入空格键时,它将在后端作为空字段,如果我没有输入任何内容,则不会显示任何错误消息。
<?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");
?>
答案 0 :(得分:1)
如果只有空格的字符串是错误的,则应使用trim
函数:
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';
$errflag = true;
}
答案 1 :(得分:0)
您应该使用修剪功能但不能在条件下使用,但在分配$ _POST数据时
而不是:
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$age = $_POST['age'];
你应该有代码:
$fname = trim($_POST['fname']);
$lname = trim($_POST['lname']);
$age = trim($_POST['age']);
否则,您将使用可能的白色字符将数据放入数据库,这将导致将来出现问题。