如何在PHP中添加简单验证？

如何添加一个简单的验证来检查每个输入是否为空？如何在PHP中添加简单验证？

我只是瞄准一个简单的验证，如果至少有一个窗体是空的，它将显示php文件中的错误。并在所有内容完全填满后继续将输入添加到数据库中。我已经在html表单的表单字段中为每个输入设置了变量。

HTML代码：

<html> 
<head> 
    <title>FEATHER FRIENDS PIZZA SHOP</title> 
</head> 
<img src="pics/logo.png"> 
<style> 
    img { 
     display: block; 
     margin: auto; 
     width:100%; 
    } 

    input[type=text], select { 
     width: 100%; 
     padding: 12px 20px; 
     margin: 8px 0; 
     display: inline-block; 
     border: 1px solid #ccc; 
     border-radius: 4px; 
     box-sizing: border-box; 
    } 

    input[type=submit] { 
     width: 100%; 
     background-color: #4CAF50; 
     color: white; 
     padding: 14px 20px; 
     margin: 8px 0; 
     border: none; 
     border-radius: 4px; 
     cursor: pointer; 
    } 

    input[type=reset] { 
     width: 100%; 
     background-color: #bfac2c; 
     color: white; 
     padding: 14px 20px; 
     margin: 8px 0; 
     border: none; 
     border-radius: 4px; 
     cursor: pointer; 
    } 

    input[type=reset]:hover { 
     background-color: #c43848; 
    } 

    input[type=submit]:hover { 
     background-color: #c43848; 
    } 

    div { 
     background-image: url('pics/bg.png'); 
     background-attachment: fixed; 
     background-repeat: no-repeat; 
     background-size: 100% 100%; 
     padding: 100px; 
    } 
    body { 
     display: block; 
     margin: auto; 
     width: 100%; 
     height: 100%; 
     background-color: #f6f6d4; 
     background-attachment: fixed; 
     background-repeat: no-repeat; 
     background-size: 100% 100%; 
    } 
    </style> 
    <div> 
<body> 
<img src="pics/pizza.png"> 
<form action="http://localhost/insert.php" method="post"> 

<img src="pics/name.png"> 
<input type="text" id="fname" name="name" placeholder="Your full name..."> 

<img src="pics/size.png"> 
<select id="size" name="size"> 
    <option value="small">Small</option> 
    <option value="medium">Medium</option> 
    <option value="large">Large</option> 
    <option value="extra large">Extra Large</option> 
</select> 

<img src="pics/crust.png"> 
<select id="crust" name="crust"> 
    <option value="pan">Pan</option> 
    <option value="thin">Thin</option> 
    <option value="stuffed">Stuffed</option> 
    <option value="handtossed">Hand-Tossed</option> 
    <option value="deepdish">Deep Dish</option> 
</select> 

<img src="pics/garnish.png"> 
<input type="text" id="garnish" name="garnish" placeholder="Write your choices here! Ex: Pepperoni, Cheese, Bacon, Mushroom"> 

<img src="pics/address.png"> 
<input type="text" id="address" name="address" placeholder="Where should we deliver?"> 

<img src="pics/contact.png"> 
<input type="text" id="contact" name="contact" placeholder="What is your contact number?"> 

<input type="submit" value="Submit"> 
<input type="reset" value="Reset your Order?"> 
</form> 
</div> 
</body> 
</html>

PHP代码：

<?php 

$link = mysqli_connect("localhost", "root", "", "pizza"); 

if($link === false){ 
die("ERROR: Could not connect. " . mysqli_connect_error()); 
} 

$name = mysqli_real_escape_string($link, $_POST['name']); 
$size = mysqli_real_escape_string($link, $_POST['size']); 
$crust = mysqli_real_escape_string($link, $_POST['crust']); 
$garnish = mysqli_real_escape_string($link, $_POST['garnish']); 
$address = mysqli_real_escape_string($link, $_POST['address']); 
$contact = mysqli_real_escape_string($link, $_POST['contact']); 

$sql = "INSERT INTO deliver (name, size, crust, garnish, address, contact) 
VALUES ('$name', '$size', '$crust', '$garnish', '$address', '$contact')"; 
if(mysqli_query($link, $sql)){ 
echo "Data successfully Saved."; 
} else{ 
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); 
} 

mysqli_close($link); 
?>

来源

2017-10-08 CoolGwordz

按照这样的： https://stackoverflow.com/questions/19790601/php-simple-form-validation – Saurabh

下面是一个简单的代码行，检查所有的表单字段填充：

<?php 

    $link = mysqli_connect("localhost", "root", "", "pizza"); 

    if($link === false){ 
     die("ERROR: Could not connect. " . mysqli_connect_error()); 
    } 

    $name = mysqli_real_escape_string($link, $_POST['name']); 
    $size = mysqli_real_escape_string($link, $_POST['size']); 
    $crust = mysqli_real_escape_string($link, $_POST['crust']); 
    $garnish = mysqli_real_escape_string($link, $_POST['garnish']); 
    $address = mysqli_real_escape_string($link, $_POST['address']); 
    $contact = mysqli_real_escape_string($link, $_POST['contact']); 


    /*check if all the fields are not empty*/ 
    if($name != "" && $size != "" && $crust != "" && $garnish != "" && $address != "" && $contact != "") { 

     $sql = "INSERT INTO deliver (name, size, crust, garnish, address, contact) VALUES ('$name', '$size', '$crust', '$garnish', '$address', '$contact')"; 

     if(mysqli_query($link, $sql)){ 
      echo "Data successfully Saved."; 
     } else{ 
      echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); 
     } 

    } else { 
     echo "Form incomplete"; 
    } 

    mysqli_close($link); 

?>

来源

2017-10-08 07:45:41 Juan

非常感谢你！这就是我所需要的！ :) – CoolGwordz

没问题！ :) – Juan

如何在PHP中添加简单验证？

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