Question

这是我使用过的html和Php代码：

<?php 
 require_once('include_function.php');
 require_once('validation_functions.php');
 $errors = array();
 $message ="";
 if(isset($_POST['submit'])){
    $username = trim($_POST['username']);
    $password = trim($_POST['password']);
    if (array_key_exists('submit', $_POST)){
    }
    $fields_required = array("username","password");
    foreach($fields_required as $field){
        $value = trim($_POST[$field]);
        if(!has_presence($value)){
            $errors[$field]= ucfirst($field). " Cant Be blank";
        }
    }
 }
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
 <title>Single page Submission</title>
</head>
<body>
    <?php echo $message;?>
    <?php echo form_error($errors)?>
    <form action="form_with_validation.php" method="post">
        Username<input type="text" name="username" value=""/><br/>
        Password<input type="password" value="" name="password" /><br/>
        <input type="submit" name="submit" value="Submit" />
    </form>
</body>
</html>

这些是我用过的功能

function has_presence($value){
    return isset($value) && $value !=="";
}
function form_error($errors=array()){
    $output = "";
    if(!empty($errors)){
        $output .="<div class=\"error\">";
        $output .="Please fix the following errors";
        $output .="<ul>";
        foreach($errors as $key => $field){
            $output .= "<li>{$field}</li>";
        }
        $output .="</ul>";
        $output .="</div>";
    }
    return $output;

}

有人可以指导我使用验证表单，如果存在数组键 这样我就会在输入字段下方或下方收到错误消息或任何其他需要的方法

Answer 1

<?php 
    $errors = array();
    $message ="";
    if(isset($_POST['submited'])){
        $fields_required = array("username","password");
        foreach($fields_required as $field)
            if (!isset($_POST[$field]) || $_POST[$field]=="")
                $errors[$field]= $field. " Cant Be blank";
    }

    function form_error($errors=array()){ 
        $output = "";
        if(!empty($errors)) {
            $output .="<div class=\"error\">";
            $output .="Please fix the following errors";
            $output .="<ul>";
            foreach($errors as $key => $field){
                $output .= "<li>{$field}</li>";
            }
            $output .="</ul>";
            $output .="</div>";
        }
        return $output;
    }
}  
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Single page Submission</title>
</head>

<body>
<?php echo $message;?>
<form action="form_with_validation.php" method="post">
<input type="hidden" name="submited" value="1" />
Username<input type="text" name="username" value=""/><br/>
Password<input type="password" value="" name="password" /><br/>
<input type="submit" name="submit" value="Submit" />
</form>
<?php echo form_error($errors)?>
</body>
</html>

Answer 2

@sandeep S K你能在代码下面试一次吗？：

注意：请在脚本顶部包含所需的数据库连接或验证文件。

 <?php 
    function has_presence($value){
        return isset($value) && $value !=="";
    }
    function form_error($errors=array()){
        $output = "";
        if(!empty($errors)){
            $output .="<div class=\"error\">";
            $output .="Please fix the following errors";
            $output .="<ul>";
            foreach($errors as $key => $field){
                $output .= "<li>{$field}</li>";
            }
            $output .="</ul>";
            $output .="</div>";
        }
        return $output;

    }

     $errors = array();
     $message ="";
     if(isset($_POST['submit'])){
        $username = trim($_POST['username']);
        $password = trim($_POST['password']);
        if (array_key_exists('submit', $_POST)){
        }
        $fields_required = array("username","password");
        foreach($fields_required as $field){
            $value = trim($_POST[$field]);
            if(!has_presence($value)){
                $errors[$field]= ucfirst($field). " Cant Be blank";
            }
        }
     }
    ?>
    <!doctype html>
    <html>
    <head>
    <meta charset="utf-8">
     <title>Single page Submission</title>
    </head>
    <body>
        <?php echo $message;?>
        <?php  if(!empty($errors)) { ?>

                <div class="has_errors"> 
                    <ul>
                        <li>    
                            There are errors in your input. Please fix them and try again.
                        </li>
                    </ul>
                </div>
            <?php
        }
        ?>
        <form action="index.php" method="post">
            Username<input type="text" name="username" value=""/>
            <?php 
                if (array_key_exists('username', $errors)) {
                    ?>
                    <div class="has_errors"> 
                        <ul>
                            <li>    
                                <?php print $errors['username'];?>
                            </li>
                        </ul>
                    </div>
                    <?php
                }
            ?>
            <br/>
            Password<input type="password" value="" name="password" />
             <?php 
                if (array_key_exists('password', $errors)) { ?>
                    <div class="has_errors"> 
                        <ul>
                            <li>    
                                <?php print $errors['password'];?>
                            </li>
                        </ul>
                    </div>
                    <?php
                }
            ?>
            <br/>
            <input type="submit" name="submit" value="Submit" />
        </form>
    </body>
    </html>

使用if数组键进行表单验证

2 个答案: