我想验证用户输入到mysql数据库的数据。 因此，用户不能在需要数字的字段中输入字母。 验证后应将数据输入数据库。 我写了那段代码，但它不起作用..它接受数字字段的字母
<?php
include 'testinput.php';
error_reporting(E_ERROR | E_PARSE);
if(isset($_POST['submitted'])){
$con = mysqli_connect("localhost","USERNAME","PASSWORD","DATABASE");
if(mysqli_connect_errno()){
echo "Failed to connect";
}
$card1 = test_input($_POST['card']);
$first1= $_POST['first'];
$last1= $_POST['last'];
$id1 = test_input($_POST['id']);
$mob1 = test_input($_POST['mobile']);
$vis1 = test_input($_POST['visit']);
$query = "INSERT INTO aftness1_clients.clients (card, first, last, id, mobile, visit) VALUES ('$card1','$first1','$last1','$id1', '$mob1','$vis1')";
if(!mysqli_query($con, $query)){
echo "Error ". mysqli_error($con);
echo "<br>";
}
$newrecord ="<b>One client added Successfully !</b>";
}// end of main if
?>
<html>
<header>
<title>
Add a Client
</title>
</header>
<body bgcolor="#F0FFFF">
<br/> <br/> <center><font size="5" color="#4EE2EC"> Clients Information </font> </center> <br/>
<b>All fields are required:</b> <br/> <br/>
<form action = "insert.php" method="post">
<input type="hidden" name="submitted" value="true"/>
<fieldset>
<legend>New Client</legend>
<lable><font size="3" color="#38ACEC"><b>Card Number:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="card"/><br/>
<lable><font size="3" color="#38ACEC"><b>First Name:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="first"/><br/>
<lable><font size="3" color="#38ACEC"><b>Last Name:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="last"/><br/>
<lable><font size="3" color="#38ACEC"><b>ID Number:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="id"/><br/>
<lable><font size="3" color="#38ACEC"><b>Mobile Number:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="mobile"/><br/>
<lable><font size="3" color="#38ACEC"><b>Visits:</b></font></lable>
<input type="text" STYLE="font-family: Verdana; font-weight: bold; font-size: 12px;" size="10" maxlength="30" name="visit"/><br/>
</fieldset>
</br>
<font color="#FFFFFF"> <input type ="Submit" name="submit" value = "Add" align="right"/></font>
</form>
<?php
error_reporting(E_ERROR | E_PARSE);
echo $newrecord
?>
</body>
</html>
<br/><br/><br/>
<a href="index.php">Main Page</a>
这是testinput函数
<?php
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
我的代码中的问题在哪里，还有其他方法可以检查数据的验证吗？
答案 0 :(得分：0)
您需要使用正则表达式或php数字检查函数来验证您的输入数据 is_int()或is_numeric()
function test_input($data)
{
$data = trim($data);
if(is_int($data)) {
return $data;
}
else {
//do your stuff may be redirect to again input page and display error msg.
}
}
使用正则表达式： -
if (preg_match('/^[0-9]+$/', $str)) {
// contains only 0-9
} else {
// contains other stuff
}
答案 1 :(得分：0)
这是我为这样的验证编写的php类。随意使用它！
<?php
class filterInput {
public function __construct() {
}
public function filterAllButNumbers($string) {
return $this->returnedValue($string, preg_replace("[^0-9]", "", $string));
}
public function filterAllButLetters($string) {
return $this->returnedValue($string, preg_replace("[^A-Za-z]", "", $string));
}
public function filterAllButNumbersAndSpaces($string) {
return $this->returnedValue($string, preg_replace("[^0-9 ]", "", $string));
}
public function filterAllButLettersAndSpaces($string) {
return $this->returnedValue($string, preg_replace("[^A-Za-z ]", "", $string));
}
public function filterAllButNumbersAndLetters($string) {
return $this->returnedValue($string, preg_replace("[^A-Za-z0-9]", "", $string));
}
public function filterAllButNumbersLettersAndSpaces($string) {
return $this->returnedValue($string, preg_replace("[^A-Z a-z0-9]", "", $string));
}
public function filterHex($string) {
return $this->returnedValue($string, preg_replace("[^A-Fa-f0-9]", "", $string));
}
public function filterSlashes($string) {
return $this->returnedValue($string, stripSlashes($string));
}
public function filterTags($string) {
return $this->returnedValue($string, strip_tags($string));
}
public function filterEmail($email) {
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
return true;
} else {
return false;
}
}
public function filterLength($string, $minimum, $maximum) {
if(strlen($string) >= $minimum && strlen($string) <= $maximum) {
return true;
} else {
return false;
}
}
public function boolify($filteredString) {
if(strcmp($filteredString, "true") == 0) {
return true;
} else {
return false;
}
}
private function returnedValue($string, $filteredString) {
if (strcmp($string, $filteredString) != 0) {
return $filteredString;
} else {
return "true";
}
}
}
?>
如果字符串符合条件，则返回true（以字符串形式）。
答案 2 :(得分：0)
在代码中执行一些Javascript验证
这里有一个简单的例子;
<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<style type="text/css">
body
{
font-size: 9pt;
font-family: Arial;
}
</style>
</head>
<body>
Numeric Value: <input type="text" id="text1" onkeypress="return IsNumeric(event);" ondrop="return false;" onpaste="return false;" />
<span id="error" style="color: Red; display: none">* Input digits (0 - 9)</span>
<script type="text/javascript">
var specialKeys = new Array();
specialKeys.push(8); //Backspace
function IsNumeric(e) {
var keyCode = e.which ? e.which : e.keyCode
var ret = ((keyCode >= 48 && keyCode <= 57) || specialKeys.indexOf(keyCode) != -1);
document.getElementById("error").style.display = ret ? "none" : "inline";
return ret;
}
</script>
</body>
</html>
希望它会帮助你！
答案 3 :(得分：0)
检查这一个以进行验证ctype_alpha仅检查字母[A-Za-z] 或者preg_match（＆＃34; / ^ [a-zA-Z \ s] + $ /＆＃34;，$ data）。