php 验证无效的问题

Question

我的任务是制作简单的 i-Prepaid Reload programming.So 到目前为止，我遇到了无法在 reload.php 页面上进行验证的问题。好像根本没有设置验证，按下 Buy 按钮后它转到 result.php。我无法弄清楚这个错误的原因是什么。如果我在 reload.php.

中输入字母或少于 10 个数字或忽略所有这些选项，应该会出现一些错误

login.php

form action="" method="post"  name="Login_Form">
    <table width="400" border="0" align="center" cellpadding="5" cellspacing="1" class="Table">
        <?php if(isset($msg)){?>
        <tr>
            <td colspan ="2" align="center" valign="top"><?php echo $msg;?></td>
        </tr>
    <?php } ?>
    <tr>
        <td colspan="2" align="left" valign="top"><h3>Login</h3></td>
    </tr>
    <tr>
        <td align="right" valign="top">Username</td>
        <td><input name="Username" type="text" class="Input"><td>
    </tr>
    <tr>
        <td align="right">Password</td>
        <td><input name="Password" type="password" class="Input"></td>
    </tr>
    <tr>
        <td> </td>
        <td><input name="Submit" type="submit" value="Login" class="Button3"></td>
    </tr>
    </table>
</form>

<?php session_start();

if(isset($_POST['Submit']))
{
    $logins = array(
            ['username' =>'Fadzli', 'password' => '11111'],
            ['username' =>'user2', 'password' => '22222'],
            ['username' =>'user3', 'password' => '33333'],
            ['username' =>'user4', 'password' => '44444'],
    );

    $log_username = isset($_POST['Username']) ? $_POST['Username'] :'';
    $log_password = isset($_POST['Password']) ? $_POST['Password'] :'';

    $key = FALSE;
    $key = array_search($log_username, array_column($logins, 'username'));
    $password = '';
    echo $key;
    var_dump($key);
    if(!is_bool($key)){
        $password = $logins[$key]['password'];
    }

    if($log_password == $password){
        $_SESSION['Userdata'] = ['username' => $log_username];
        header("location:reload.php");
        exit;
    }else{
        $msg="<span style='color:red'>Invalid Login Information</span>";
    }
}
?>

reload.php

<?php session_start(); 


$phonenumber = $Telco = $Reload ='';
$numberError = $telcoError = $ReloadError = '';


if(isset($_POST['Submit']))
{
    $phonenumber=$_POST['phonenumber'];
    if(array_key_exists('phonenumber',$_POST) && trim($_POST['phonenumber']) === '')
    {
        $numberError = "Error, insert phone number";    
    }
else 
    {
        if(!preg_match('/^([0-9]*)$/', $phonenumber))
        {
            $numberError = "Numbers only";      
        }
        elseif(strlen($phonenumber)<10)
        {
            $numberError = "Numbers have to be 10 or longer";
        }
        
    }

    $Telco=$_POST['Telco'];
    if(array_key_exists('Telco',$_POST) && trim($_POST['Telco']) == "")
    {
        $telcoError = "Error! Select your telco!";  
    }

    $Reload=$_POST['ReloadCredit'];
    if(array_key_exists('ReloadCredit',$_POST) && trim($_POST['ReloadCredit']) == "")
    {
        $ReloadError = "Error! Select the amount you wish to reload!";
    }
}


function test_input($data)
    {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
    

    if($numberError=="" && $telcoError=="" && $ReloadError=="")
    {
        $_SESSION['data'] = ['phonenumber'  => $_POST['phonenumber'] , 
                             'Telco'        => $_POST['Telco'] ,
                             'ReloadCredit' => $_POST['ReloadCredit'] ];
        
            
    }
    }
?>


<?php 
$title = "i-PREPAID RELOAD";
?>

<html>
    
<style>
.topup_form{
    max-width: 700px;
    font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
    margin-right:auto;
    margin-left:auto;
}
.topup_form label{
    display:block;
    margin-bottom: 10px;
    text-align:left;
}
.note1{
    margin-top:5px;
    font-size: 17px;
}

.topup_form label > span{
    float: left;
    width: 170px;
    color: #F072A9;
    font-weight: bold;
    font-size: 17px;
    text-shadow: 1px 1px 1px #fff;
}
.topup_form fieldset{
    border-radius: 10px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    margin: 0px 0px 10px 0px;
    border: 1px solid #FFD2D2;
    padding: 20px;
    background: #FFF4F4;
    box-shadow: inset 0px 0px 15px #FFE5E5;
    -moz-box-shadow: inset 0px 0px 15px #FFE5E5;
    -webkit-box-shadow: inset 0px 0px 15px #FFE5E5;
}
.topup_form fieldset legend{
    color: #FFA0C9;
    border-top: 1px solid #FFD2D2;
    border-left: 1px solid #FFD2D2;
    border-right: 1px solid #FFD2D2;
    border-radius: 5px 5px 0px 0px;
    -webkit-border-radius: 5px 5px 0px 0px;
    -moz-border-radius: 5px 5px 0px 0px;
    background: #FFF4F4;
    padding: 0px 8px 3px 8px;
    box-shadow: -0px -1px 2px #F1F1F1;
    -moz-box-shadow:-0px -1px 2px #F1F1F1;
    -webkit-box-shadow:-0px -1px 2px #F1F1F1;
    font-weight: normal;
    font-size: 25px;
}

.topup_form  button,
.topup_form  input[type=reset],
.topup_form  input[type=button]{
    background: #EB3B88;
    border: 1px solid #C94A81;
    padding: 5px 15px 5px 15px;
    color: #FFCBE2;
    box-shadow: inset -1px -1px 3px #FF62A7;
    -moz-box-shadow: inset -1px -1px 3px #FF62A7;
    -webkit-box-shadow: inset -1px -1px 3px #FF62A7;
    border-radius: 3px;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;    
    font-weight: bold;    
}

.Button
{
    width: 170px;
    margin-right:auto;
    margin-left:auto;
}

#warning{text-align:left;}
</style>

<div class="topup_form">

<form name="Topup" action="result.php" method="post" onsubmit="return confirm('Are you sure?')" >

<fieldset><legend><?php echo $title ?></legend>

    Welcome <?php echo $_SESSION['Userdata']['username'];?>

    <label for="phonenumber"><span>Phone Number <span>*</span></span><input type="text" name="phonenumber"/></label>
    <div id = "warning" style="color: red;"><?php echo $numberError ?? '';?></div><br>

    <label for="Telco"><span>Telco</span><select name="Telco">
    <option value=""></option>
    <option value="Maxis">Maxis</option>
    <option value="Celcom">Celcom</option>
    <option value="Digi">Digi</option>
    <option value="TuneTalk">TuneTalk</option>
    <option value="Unifi">Unifi</option>
    </select></label>
    <span class="note1">(Example:Maxis, Celcom, Digi)</span>
    <div id = "warning" style="color: red;"><?php echo $telcoError ?? '';?></div><br>

    <label for="Reload"><span>Reload Credit </span><select name="ReloadCredit">
    <option value=""></option>
    <option value="5">RM5</option>
    <option value="10">RM10</option>
    <option value="20">RM20</option>
    <option value="30">RM30</option>
    <option value="50">RM50</option>
    </select></label>
    <span class="note1">(Example:RM5,RM10,RM20)</span>
    <div id = "warning" style="color: red;"><?php echo $ReloadError ?? '';?></div><br>    
</fieldset>
<fieldset class="Button">
<button  type="submit" value="Submit" name='Submit' >Buy</button>
<input type="reset" value="Reset" />
</fieldset>
</form>


</html>

'result.php'

<html>
<?php session_start()?>



<form name="result" action="">

Hi <?php echo $_SESSION['Userdata']['username'];?>
<br>

<p>Successfully reloaded</p>

<label for="phonenumber"><span>Phone Number : </span><?php echo $_POST['phonenumber']?></label><br>
<label for="telco"><span>Telco : </span><?php echo $_POST['Telco'] ?><br>
<label for="reloadcredit"><span>Reload Credit : RM </span><?php echo $_POST['ReloadCredit']?>
<p>Thank you for using i-Prepaid Reload</p>
</form>


</html>

Answer 1

请注意array_search，如果没有找到任何记录，一般情况下会return false。

但是，array_search 可能 return 布尔值 false，但也可能 return 一个 non-Boolean 值为 false 的值（参见官方文档：https://www.php.net/manual/en/function.array-search.php）

另一方面，如果匹配在第一条记录上，return 结果将为 0（第一条记录匹配）。

因此，为了涵盖所有情况，您可以将 login.php 更改为：

login.php

<?php session_start();

if(isset($_POST['Submit']))
{
    $logins = array(
            ['username' =>'Fadzli', 'password' => '11111'],
            ['username' =>'user2', 'password' => '22222'],
            ['username' =>'user3', 'password' => '33333'],
            ['username' =>'user4', 'password' => '44444'],
    );

    $log_username = isset($_POST['Username']) ? $_POST['Username'] :'';
    $log_password = isset($_POST['Password']) ? $_POST['Password'] :'';

    $key= "";     

    $key = array_search($log_username, array_column($logins, 'username'));
    
    if(trim($key) !=""){
        $password = $logins[$key]['password'];
    }

if (trim($key)!=""){

 if($log_password == $password){
        $_SESSION['Userdata'] = ['username' => $log_username];
        header("location:reload.php");
        exit;
    }else{
        $msg="<span style='color:red'>Invalid Login Information</span>";
    }


}else
{
        $msg="<span style='color:red'>Please input login username and password</span>";
    }


}

?>


<form action="#" method="post"  name="Login_Form">
    <table width="400" border="0" align="center" cellpadding="5" cellspacing="1" class="Table">
        <?php if(isset($msg)){?>
        <tr>
            <td colspan ="2" align="center" valign="top"><?php echo $msg;?></td>
        </tr>
    <?php } ?>
    <tr>
        <td colspan="2" align="left" valign="top"><h3>Login</h3></td>
    </tr>
    <tr>
        <td align="right" valign="top">Username</td>
        <td><input name="Username" type="text" class="Input"><td>
    </tr>
    <tr>
        <td align="right">Password</td>
        <td><input name="Password" type="password" class="Input"></td>
    </tr>
    <tr>
        <td> </td>
        <td><input name="Submit" type="submit" value="Login" class="Button3"></td>
    </tr>
    </table>
</form>

对于reload.php，请

修改您的原始代码，以便将其提交给自己（否则永远不会进行验证）
如果所有数据都验证正确，将提交的数据存储为会话变量（即$_SESSION['phonenumber']、$_SESSION['Telco']和 $_SESSION['ReloadCredit']), 然后重定向到 result.php

reload.php

<?php session_start(); 


$phonenumber = $Telco = $Reload ='';
$numberError = $telcoError = $ReloadError = '';


$_SESSION['phonenumber']="";
$_SESSION['Telco']="";
$_SESSION['ReloadCredit']="";



if(isset($_POST['Submit']))
{
    $phonenumber=$_POST['phonenumber'];
    if(array_key_exists('phonenumber',$_POST) && trim($_POST['phonenumber']) === '')
    {
        $numberError = "Error, insert phone number";    
    }
else 
    {
        if(!preg_match('/^([0-9]*)$/', $phonenumber))
        {
            $numberError = "Numbers only";      
        }
        elseif(strlen($phonenumber)<10)
        {
            $numberError = "Numbers have to be 10 or longer";
        }
        
    }

    $Telco=$_POST['Telco'];
    if(array_key_exists('Telco',$_POST) && trim($_POST['Telco']) == "")
    {
        $telcoError = "Error! Select your telco!";  
    }

    $Reload=$_POST['ReloadCredit'];
    if(array_key_exists('ReloadCredit',$_POST) && trim($_POST['ReloadCredit']) == "")
    {
        $ReloadError = "Error! Select the amount you wish to reload!";
    }

    if ($ReloadError=="" && $telcoError=="" && $numberError=="")
    {

$_SESSION['phonenumber']=$_POST['phonenumber'];
$_SESSION['Telco']=$_POST['Telco'];
$_SESSION['ReloadCredit']=$_POST['ReloadCredit'];


 header("location:result.php");
        exit;
    }


}


function test_input($data)
    {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
    

    if($numberError=="" && $telcoError=="" && $ReloadError=="")
    {
        $_SESSION['data'] = ['phonenumber'  => $_POST['phonenumber'] , 
                             'Telco'        => $_POST['Telco'] ,
                             'ReloadCredit' => $_POST['ReloadCredit'] ];
        
    

    }

    }
?>


<?php 
$title = "i-PREPAID RELOAD";
?>

<html>
    
<style>
.topup_form{
    max-width: 700px;
    font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
    margin-right:auto;
    margin-left:auto;
}
.topup_form label{
    display:block;
    margin-bottom: 10px;
    text-align:left;
}
.note1{
    margin-top:5px;
    font-size: 17px;
}

.topup_form label > span{
    float: left;
    width: 170px;
    color: #F072A9;
    font-weight: bold;
    font-size: 17px;
    text-shadow: 1px 1px 1px #fff;
}
.topup_form fieldset{
    border-radius: 10px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    margin: 0px 0px 10px 0px;
    border: 1px solid #FFD2D2;
    padding: 20px;
    background: #FFF4F4;
    box-shadow: inset 0px 0px 15px #FFE5E5;
    -moz-box-shadow: inset 0px 0px 15px #FFE5E5;
    -webkit-box-shadow: inset 0px 0px 15px #FFE5E5;
}
.topup_form fieldset legend{
    color: #FFA0C9;
    border-top: 1px solid #FFD2D2;
    border-left: 1px solid #FFD2D2;
    border-right: 1px solid #FFD2D2;
    border-radius: 5px 5px 0px 0px;
    -webkit-border-radius: 5px 5px 0px 0px;
    -moz-border-radius: 5px 5px 0px 0px;
    background: #FFF4F4;
    padding: 0px 8px 3px 8px;
    box-shadow: -0px -1px 2px #F1F1F1;
    -moz-box-shadow:-0px -1px 2px #F1F1F1;
    -webkit-box-shadow:-0px -1px 2px #F1F1F1;
    font-weight: normal;
    font-size: 25px;
}

.topup_form  button,
.topup_form  input[type=reset],
.topup_form  input[type=button]{
    background: #EB3B88;
    border: 1px solid #C94A81;
    padding: 5px 15px 5px 15px;
    color: #FFCBE2;
    box-shadow: inset -1px -1px 3px #FF62A7;
    -moz-box-shadow: inset -1px -1px 3px #FF62A7;
    -webkit-box-shadow: inset -1px -1px 3px #FF62A7;
    border-radius: 3px;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;    
    font-weight: bold;    
}

.Button
{
    width: 170px;
    margin-right:auto;
    margin-left:auto;
}

#warning{text-align:left;}
</style>

<div class="topup_form">

<form name="Topup" action="#" method="post" onsubmit="return confirm('Are you sure?')" >

<fieldset><legend><?php echo $title ?></legend>

    Welcome <?php echo $_SESSION['Userdata']['username'];?>

    <label for="phonenumber"><span>Phone Number <span>*</span></span><input type="text" name="phonenumber"/></label>
    <div id = "warning" style="color: red;"><?php echo $numberError ?? '';?></div><br>

    <label for="Telco"><span>Telco</span><select name="Telco">
    <option value=""></option>
    <option value="Maxis">Maxis</option>
    <option value="Celcom">Celcom</option>
    <option value="Digi">Digi</option>
    <option value="TuneTalk">TuneTalk</option>
    <option value="Unifi">Unifi</option>
    </select></label>
    <span class="note1">(Example:Maxis, Celcom, Digi)</span>
    <div id = "warning" style="color: red;"><?php echo $telcoError ?? '';?></div><br>

    <label for="Reload"><span>Reload Credit </span><select name="ReloadCredit">
    <option value=""></option>
    <option value="5">RM5</option>
    <option value="10">RM10</option>
    <option value="20">RM20</option>
    <option value="30">RM30</option>
    <option value="50">RM50</option>
    </select></label>
    <span class="note1">(Example:RM5,RM10,RM20)</span>
    <div id = "warning" style="color: red;"><?php echo $ReloadError ?? '';?></div><br>    
</fieldset>
<fieldset class="Button">
<button  type="submit" value="Submit" name='Submit' >Buy</button>
<input type="reset" value="Reset" />
</fieldset>
</form>


</html>

对于result.php，仅通过会话变量显示提交的数据：

result.php

<html>
<?php session_start()?>



<form name="result" action="">

Hi <?php echo $_SESSION['Userdata']['username'];?>
<br>

<p>Successfully reloaded</p>

<label for="phonenumber"><span>Phone Number : </span><?php echo $_SESSION['phonenumber']?></label><br>
<label for="telco"><span>Telco : </span><?php echo $_SESSION['Telco'] ?><br>
<label for="reloadcredit"><span>Reload Credit : RM </span><?php echo $_SESSION['ReloadCredit']?>
<p>Thank you for using i-Prepaid Reload</p>
</form>


</html>

但是，将来请考虑使用数据库方法来管理用户的凭据。否则，每次您有新的/更改的用户名 and/or 密码时，您都需要更新 PHP 数组列表。

php 验证无效的问题

Problems with php validations not working

html

javascript

php

forms

validation

login.php

reload.php

result.php