我创建了一个收集客户数据的表单。该数据被发送到MySQL数据库，图像移动到服务器上所需的文件夹。
我想要完成的是只允许上传图像。当我将标准设置为GIF时，它工作得很好，但当我尝试JPG/JPEG/PNG时，它不起作用。
,
<?php
//Connection String
$con=mysqli_connect("localhost","username","password","database");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
//Write to the database
$sql="INSERT INTO Main_Details (driver_ID, driver_image_num, first_name, last_name, dob, license_number, license_image_num, vehicle_badge_image_num, display_image_num, vehicle_number, mobile_number, service_provider, preferred_language, fathers_name, residential_address, city, pin_code, state, work_start, work_stop, preferred_localities, auto_union, badge_number, introduced_by, introducer_tel, license_expiration, rc_book_expiration, fc_expiration, insurance_expiration, insurance_provider, insurance_policy_num, meter_expiration, permit_expiration, emission_expiration, date_signed, form_scanned_by, form_scan_date, form_scan_image_front_num, form_scan_image_back_num, agent_name, agent_id, submitted_to, submitted_on, your_name, todays_date, notes)
VALUES
('$_POST[driver_ID]','$_POST[driver_image_num]','$_POST[first_name]','$_POST[last_name]','$_POST[dob]','$_POST[license_number]','$_POST[license_image_num]','$_POST[vehicle_badge_image_num]','$_POST[display_image_num]','$_POST[vehicle_number]','$_POST[mobile_number]','$_POST[service_provider]','$_POST[preferred_language]','$_POST[fathers_name]','$_POST[residential_address]','$_POST[city]','$_POST[pin_code]','$_POST[state]','$_POST[work_start]','$_POST[work_stop]','$_POST[preferred_localities]','$_POST[auto_union]','$_POST[badge_number]','$_POST[introduced_by]','$_POST[introducer_tel]','$_POST[license_expiration]','$_POST[rc_book_expiration]','$_POST[fc_expiration]','$_POST[insurance_expiration]','$_POST[insurance_provider]','$_POST[insurance_policy_num]','$_POST[meter_expiration]','$_POST[permit_expiration]','$_POST[emission_expiration]','$_POST[date_signed]','$_POST[form_scanned_by]','$_POST[form_scan_date]','$_POST[form_scan_image_front_num]','$_POST[form_scan_image_back_num]','$_POST[agent_name]','$_POST[agent_id]','$_POST[submitted_to]','$_POST[submitted_on]','$_POST[your_name]','$_POST[todays_date]','$_POST[notes]')";
//Error Statement
if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error($con));
}
mysqli_close($con);
//Start customer photograph upload
if ( 6097152 < filesize( $file['upload_picture'] ) ) {
// File to big.
echo "Too large a file. Unable to upload.<br>";
$ok = 2;
}
}
//The problematic part
if (!($uploaded_type=="image/GIF")) {
echo "You may only upload GIF files.<br> Your file type is";
$ok=2;
}
if ( $ok == 1 ) {
$target = "images/";
$extension = explode(".", $_FILES['upload_picture']['name']);
$extension = $extension[count($extension)-1];
$target = "images/";
$target = $target . $_POST['driver_ID'] . "_P." . $extension;
//Writes the customer photograph to the server
if(move_uploaded_file($_FILES['upload_picture']['tmp_name'], $target))
{
//Tells you if its all ok
echo "Driver's Picture uploaded successfully.<br>";
}}
else {
//Error Statement
echo "Unable to upload the Driver's Picture.";
}
//Start customer license upload
$target = "images/";
$extension = explode(".", $_FILES['upload_license']['name']);
$extension = $extension[count($extension)-1];
$target = "images/";
$target = $target . $_POST['driver_ID'] . "_L." . $extension;
//Writes the license picture to the server
if(move_uploaded_file($_FILES['upload_license']['tmp_name'], $target))
{
//Tells you if its all ok
echo "Driver License uploaded successfully as.<br>";
}
else {
//Error Statement
echo "Unable to upload the Driver's License.<br>";
}
//Start form front upload
$target = "images/";
$extension = explode(".", $_FILES['upload_form_front']['name']);
$extension = $extension[count($extension)-1];
$target = "images/";
$target = $target . $_POST['driver_ID'] . "_FF." . $extension;
//Writes the customer photograph to the server
if(move_uploaded_file($_FILES['upload_form_front']['tmp_name'], $target))
{
//Tells you if its all ok
echo "Front scan of the Form uploaded successfully.<br>";
}
else {
//Error Statement
echo "Unable to upload the Front scan of the Form.<br>";
}
//Start customer form back upload
$target = "images/";
$extension = explode(".", $_FILES['upload_form_back']['name']);
$extension = $extension[count($extension)-1];
$target = "images/";
$target = $target . $_POST['driver_ID'] . "_FB." . $extension;
//Writes the customer photograph to the server
if(move_uploaded_file($_FILES['upload_form_back']['tmp_name'], $target))
{
//Tells you if its all ok
echo "Back scan of the Form uploaded successfully.<br>";
}
else {
//Error Statement
echo "Unable to upload the Back scan of the Form.<br>";
}
echo "All details updated.";
?>
我怎样才能使它为JPG/JPEG/PNG图像工作?
与其通过扩展名来检测文件类型，不如打开文件看看里面有什么。
$allowed_types = array(IMAGETYPE_GIF,IMAGETYPE_JPEG,IMAGETYPE_PNG);
if (in_array(exif_imagetype($_FILES["upload_picture"]["tmp_name"]), $allowed_types)){
//is either jpeg, png or gif
}