Question

我写的代码似乎有一个重大错误，使我的页面显示为空白。我是PHP的菜鸟，似乎我正在做的事情是不正确的。有人可以发现错误并可能解释我将来如何识别这个错误吗？

此外，在发表评论之前，我知道在这里使用GET是一件坏事，最终的代码将使用POST，但这是我调试的方式。

<?php
{

if(!preg_match( "^(?=[^\s]*?[0-9])(?=[^\s]*?[a-zA-Z])[a-zA-Z0-9]*$" , $_GET['username']))
{
    echo username correct
}

if($_GET['password'] == $_GET['passwordc'])
{   
if(!preg_match( "^(?=[^\s]*?[0-9])(?=[^\s]*?[a-zA-Z])[a-zA-Z0-9]*$" , $_GET['password']))
        {
        echo password correct; 
        }
}

if(!preg_match( "^[a-zA-Z]{1,}$" , $_GET['fName']))
{
    echo First Name correct;
}

if(!preg_match( "^[a-zA-Z]{1,}$" , $_GET['lName']))
{
    echo Last Name correct;
}

if(!preg_match( "^\d{1,2}$" , $_GET['age']))
{
    echo age correct;
}

if(!preg_match( "^(m|M|f|F)$" , $_GET['gender']))
{
    echo Gender correct;
}

if(!preg_match( "^(((0[13578]|(10|12))/(0[1-9]|[1-2][0-9]|3[0-1]))|(02/(0[1-9]|[1-2][0-9]))|((0[469]|11)/(0[1-9]|[1-2][0-9]|30)))/[0-9]{4}$" , $_GET['birthday']))
{    
    echo Birthday correct;
}

if(!preg_match( "^\d{4}$" , $_GET['year']))
{
    echo Graduation year correct;
}


}
?>
<html>



<form method="GET" action="">
    Enter Username: <input name="username" type="text" />
    <br>
    Enter Password: <input name="password" type="password" />
    <br>
    Confirm Password: <input name="passwordc" type="password" />
    <br>
    <br>
    Personal Info:
    <br>
    Enter First Name: <input name="fName" type="text" />
    <br>
    Enter Last Name: <input name="lName" type="text" />
    <br>
    Enter Age:<input name="age" type="text" />
    <br>
    Enter Gender (m/f):<input name="gender" type="text" />
    <br>
    Enter Birthday (mm/dd/yyyy):<input name="birthday" type="text" />
    <br>
    Enter Graduation Year:<input name="year" type="text" />
    <br>
    <input type="submit" name="submit" value = "Submit!" />
</form>


</html>

Answer 1

<?php

if(isset($_GET['submit'])) {

if(!preg_match( '/^(?=[^\s]*?[0-9])(?=[^\s]*?[a-zA-Z])[a-zA-Z0-9]*$/' , $_GET['username']))
{
    echo "username correct";
}

if($_GET['password'] == $_GET['passwordc'])
{   
if(!preg_match( '/^(?=[^\s]*?[0-9])(?=[^\s]*?[a-zA-Z])[a-zA-Z0-9]*$/' , $_GET['password']))
        {
        echo "password correct"; 
        }
}

if(!preg_match( '/^[a-zA-Z]{1,}$/' , $_GET['fName']))
{
    echo "First Name correct";
}

if(!preg_match( '/^[a-zA-Z]{1,}$/' , $_GET['lName']))
{
    echo "Last Name correct";
}

if(!preg_match( '/^\d{1,2}$/' , $_GET['age']))
{
    echo "age correct";
}

if(!preg_match( '/^(m|M|f|F)$/' , $_GET['gender']))
{
    echo "Gender correct";
}

if(!preg_match( '/^(((0[13578]|(10|12))/(0[1-9]|[1-2][0-9]|3[0-1]))|(02/(0[1-9]|[1-2][0-9]))|((0[469]|11)/(0[1-9]|[1-2][0-9]|30)))/[0-9]{4}$/' , $_GET['birthday']))
{    
    echo "Birthday correct";
}

if(!preg_match( '/^\d{4}$/' , $_GET['year']))
{
    echo "Graduation year correct";
}

}
?>
<html>



<form method="GET" action="">
    Enter Username: <input name="username" type="text" />
    <br>
    Enter Password: <input name="password" type="password" />
    <br>
    Confirm Password: <input name="passwordc" type="password" />
    <br>
    <br>
    Personal Info:
    <br>
    Enter First Name: <input name="fName" type="text" />
    <br>
    Enter Last Name: <input name="lName" type="text" />
    <br>
    Enter Age:<input name="age" type="text" />
    <br>
    Enter Gender (m/f):<input name="gender" type="text" />
    <br>
    Enter Birthday (mm/dd/yyyy):<input name="birthday" type="text" />
    <br>
    Enter Graduation Year:<input name="year" type="text" />
    <br>
    <input type="submit" name="submit" value = "Submit!" />
</form>


</html>

我还添加了提交检查。表单加载，我没有测试超过那个。

我有一个表单，我在PHP中放在一起，什么也没显示。谁能诊断出来？

1 个答案: