php - 只应上传 jpg jpeg 和....照片
问题描述
我一直试图解决这个问题几个小时，但它没有奏效。
问题是：
我只想上传jpg png之类的照片，但是当我上传这种类型的照片时，我收到错误消息，只有在上传数据类型错误时才会显示。
我写了所有的代码，我还写了一些可能有问题的部分代码，所以一切都对你来说是清楚的。
<?php
//msg for the first name,
$msg='';
//msg2 for the last name
$msg2='';
//msg3 for the email
$msg3='';
//msg4 for the date
$msg4='';
//msg5 for the password
$msg5='';
//msg6 for the re Password
$msg6='';
//msg7 for the image
$msg7='';
//msg8 for the checkbox
$msg8='';
$msg9='';
$msg10='';
$firstname='';$lastname='';$email='';$date='';$password='';$c_password='';$image='';
include("includes\header.php");
include("includes\config.php");
/**isset: checks if a variable is set, which means that it has to be declared and is not NULL */
if(isset($_POST['submit']))
{
//mysqli not mysql`enter code here
$firstname=mysqli_real_escape_string($con, $_POST['fname']);
$lastname=mysqli_real_escape_string($con, $_POST['lname']);
$email=mysqli_real_escape_string($con, $_POST['mail']);
$date=$_POST['dob'];
$password=$_POST['pass'];
$c_password=$_POST['cpass'];
$image=$_FILES['image']['tmp_name'];
$checkbox=isset($_POST['check']);
// this two line was for testin, if all this is ok
//echo $firstname. "<br>".$lastname."<br>"."<br>".$email."<br>". "<br>".$date."<br>". "<br>".$password."<br>"
//."<br>".$c_password."<br>"."<br>".$image."<br>"."<br>".$checkbox."<br>";
//strlen is to returns the length of the string(firstname)
if(strlen($firstname) <3)
{
// This message must be displayed if the number of letters of the given name is less than 3
$msg="<div class='error'>First name must contain atleast 3 characters</div>";
}
else if(strlen($lastname) <3)
{
// This message must be displayed if the number of letters of the given lastname is less than 3
$msg2="<div class='error'>Last name must contain atleast 3 characters</div>";
}
//filter_var: filters the email with FVE.
else if(!filter_var($email,FILTER_VALIDATE_EMAIL))
{
// This message must be displayed if the number of letters of the given lastname is less than 3
$msg3="<div class='error'>Enter Vaild Email</div>";
}
else if (empty($date))
{
$msg4="<div class='error'> Please Enter Your Date of Birth</div>";
}
else if (empty($password))
{
$msg5="<div class='error'> Please Enter Your Password </div>";
}
else if (strlen($password) <5)
{
$msg5="<div class='error'>Password must contain atleast 5 Character</div>" ;
}
else if ($password!==$c_password)
{
$msg6="<div class='error'> Password is not same </div>";
}
else if ($image=='')
{
$msg7="<div class='error'> Please Upload Your Profile Image </div>";
}
else if($checkbox=='')
{
$msg8="<div class='error'> Please Agree Our Termas an Conditions </div>";
}
else
{
$img_ext=explode(".",$image);
$image_ext=$img_ext['1'];
if($image_ext=='jpg' || $image_ext=='png' || $image_ext=='PNG' || $image_ext=='JPG' || $image_ext=='jpeg' || $image_ext=='JPEG' )
{
// to conection to the database and gives the values
mysqli_query($con, "INSERT INTO users(first_name,last_name,mail,password,dob,img)
VALUES ('$firstname', '$lastname','$email','$date','$password','$image')");
$msg9="<div class='success'> You are Successfully Registered </div>";
$firstname='';$lastname='';$email='';$date='';$password='';$c_password='';$image='';
}
else
{
$msg7="<div class='error'> Please Upload an Image File</div>";
}
}
// this slash is from the if sumbmit
}
?>
//this part of code is from body
</head>
<style>
</style>
<body>
<!-- container: to set the content's margins dealing with the responsive behaviors of the layout.-->
<div class='container'>
<div class='login-form col-md-4 offset-md-4'>
<!--jumbotron: ndicates a big box for calling extra attention to.-->
<div class='jumbotron' style='margin-top:40px; padding-top:20px; background-color:00FF00; font-size: 20px; width:450px'>
<h3 align='center'>SignUp</h3><br>
<?php echo $msg9;?><br>
<!-- form: to creat form for user input
method=”POST” Specifying a value of POST means the browser will send the data to the web server to be processed.
enctype: specifies how the form-data should be encoded when submitting it to the server:
-->
<form method='post' enctype="multipart/form-data">
<div class="form-group">
<label> First Name: </label>
<!-- 1name: the name of th input
2. placeholder: specifies a short hint that describes the expected value of a input field / textarea.
3. All textual <input>, <textarea>, and <select> elements with class .form-control have a width of 100%.
-->
<input type='text' name='fname' placeholder="First Name" class='form-control' value='<?php echo $firstname;?>'>
<!--IF the type of information provided is not the required one, this message will be displayed-->
<?php echo $msg;?>
<!--the end of the div of First Name-->
</div>
<!--start div of the Last Name-->
<div class="form-group">
<label> Last Name: </label>
<input type='text' name='lname' placeholder="Last Name" class='form-control' value='<?php echo $lastname;?>'>
<!--IF the type of information provided is not the required one, this message will be displayed-->
<?php echo $msg2;?>
<!--the end of the div of the Last Name-->
</div>
<!--start div of the Email-->
<div class="form-group">
<label> Email: </label>
<input type='email' name='mail' placeholder="Your Email" class='form-control' value='<?php echo $email;?>'>
<!--IF the type of information provided is not the required one, this message will be displayed-->
<?php echo $msg3;?>
<!--the end of the div of the Email-->
</div>
<!--start div of the birth day-->
<div class="form-group">
<label> Date of Birth: </label>
<input type='date' name='dob' value='<?php echo $date;?>'>
<?php echo $msg4; ?>
<!--the end of the div of birth day-->
</div>
<!--start div of the Password-->
<div class="form-group">
<label> Password: </label>
<input type='password' name='pass' placeholder="Password" class='form-control' value='<?php echo $password;?>'>
<?php echo $msg5;?>
<!--the end of the div of the Password-->
</div>
<!--start div of the Re-enter Password-->
<div class="form-group">
<label> Re-enter Password: </label>
<input type='password' name='cpass' placeholder="Re-enter Password" class='form-control' value='<?php echo $c_password;?>'>
<?php echo $msg6;?>
<!--the end of the div of the Re-enter Password-->
</div>
<!--start div of the image profile -->
<div class="form-group">
<label> Profile Image: </label>
<input type='file' name='image' value='<?php echo $image;?>'/><br>
<?php echo $msg7;?>
<?php echo $msg10;?>
<!--the end of the div of the image profile -->
</div>
<!--start div of the checkbox -->
<div class="form-group">
<input type='checkbox' name='check' />
I Agree the terms and conditions
<?php echo $msg8;?>
<!--the end of the div of the checkbox -->
</div>
<!-- submit button-->
<br><input type='submit' value='submit' name='submit' class='btn btn-success' style="background-color:blue;"><br>
<!--the end of the form for the sign up icon-->
</form>
<!--the end of the jumbtorn class-->
</div>
</div>
</div>
</body>
</html>
我已经重写了可能出现问题的代码部分。
// this part is from php
else
{
$img_ext=explode(".",$image);
$image_ext=$img_ext['1'];
if($image_ext=='jpg' || $image_ext=='png' || $image_ext=='PNG' || $image_ext=='JPG' || $image_ext=='jpeg' || $image_ext=='JPEG' )
{
// to conection to the database and gives the values
mysqli_query($con, "INSERT INTO users(first_name,last_name,mail,password,dob,img)
VALUES ('$firstname', '$lastname','$email','$date','$password','$image')");
$msg9="<div class='success'> You are Successfully Registered </div>";
$firstname='';$lastname='';$email='';$date='';$password='';$c_password='';$image='';
}
else
{
$msg7="<div class='error'> Please Upload an Image File</div>";
}
}
这部分来自身体。
我已经重写了可能出现问题的代码部分。
<!--start div of the image profile -->
<div class="form-group">
<label> Profile Image: </label>
<input type='file' name='image' value='<?php echo
$image;?>'/><br>
<?php echo $msg7;?>
<?php echo $msg10;?>
<!--the end of the div of the image profile -->
</div>
解决方案
您可以添加到您的输入accept参数：
<input type="file" name="myImage" accept="image/jpeg" />
当用户选择图像时，他将在自己的文件管理器中只看到 JPG 文件。我不记得这在每个浏览器中都有效。在 Chrome 中必须工作。在 Safari 中可能不是。
您还可以在发送到服务器端之前检查文件扩展名。只需像这样编写自定义验证器（JS代码）：
var file = "test.mp4";
var valid = (file.substring(file.lastIndexOf("."), file.length)).toLowerCase();
if (valid != '.jpg') {
console.log("Please Select Valid Image");
} else {
console.log("Is valid image");
}
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