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<?php
if($_POST){
$mysql_server = 'localhost';
$mysql_username = 'root';
$mysql_password = 'root';
$mysql_database = 'test';
$name = $_POST['name'];
$query = "Select * FROM user Where name='".$name."'";
echo $query.'<br />';
$conn = mysql_connect($mysql_server, $mysql_username, $mysql_password);
mysql_select_db($mysql_database,$conn);
$result = mysql_query($query);
if(mysql_num_rows($result)!=0){
echo '<script>alert("用户名正确!");</script>';
}else{
echo '<script>alert("用户名错误!");</script>';
}
}
?>
<form action="" method="post">
name:<input type="text" name="name" size="30" />
<input type="submit" value="Submit" />
</form>