当某些输入为blob并且必须在PHP中发送send_long_data()时，如何绑定不同数量的输入 [英] How to bind varying number of inputs when some are blob and must be sent send_long_data() in PHP
本文介绍了当某些输入为blob并且必须在PHP中发送send_long_data()时，如何绑定不同数量的输入的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在做学校作业，我需要处理一个包含诸如位置，价格，描述以及1到4张图像(每张最大5MB)的值的表格.我需要上传到数据库，但是无法获取使用send_long_data()发送的图像.我不知道如何在发送长数据时仅处理一些输入.我已经能够使用call_user_func_array()通过引用将用于绑定输入数组的代码拼凑在一起，但是在过去的一天里，我一直没有运气.编码新手，我很困惑.感谢您的帮助.
I am working on a school assignment and I need to process a form with values such as location, price, description, and a 1 to 4 images up to 5MB each. I need to upload to a database, but I cannot get the images sent using send_long_data(). I do not know how to process only some of the inputs as send long data. I have been able to cobble together code for binding an array of inputs by reference using call_user_func_array(), but for over a day now I have had no luck getting it to work. New to coding and I am stumped. Any help is appreciated.
**<?php
//show logged in/logout header
include 'header.php';
include 'connectLankasListDB.php';
$image_count = 0;
if(!isset($_SESSION['username'])) {
echo ('Please login before posting.');
sleep(2);
header('Location: login.html');
} elseif (empty($_POST['title']) or
empty($_POST['price']) or
empty($_POST['description']) or
empty($_POST['email']) or
empty($_POST['confirm_email'])) {
//All fields not filled out
echo 'Please fill out title, price, description, email, and email-confirmation fields.';
echo '<br/>';
echo '<a href="new_post.html">New Post</a>';
//email not a valid email, prompt to enter correct email
} elseif (filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) === false) {
die("Enter a valid email address.");
//terms agreement checkbox not checked
} elseif ($_POST['terms'] === '0') {
die("Please agree to terms and conditions");
//email and confirmation email match, continue with script
} elseif ($_POST['email'] !== $_POST['confirm_email']) {
echo 'Email and confirmation email do not match--try again!';
//Check that image files are correct type and within the size limit
} elseif (isset($_FILES['images1'])) {
//print_r($_FILES);
$image_count = count(array_filter($_FILES['images1']['tmp_name'])); //number of uploaded images
$allowed_extensions = array("jpg", "jpeg", "png", "gif", "bmp");
for ($x=0; $x < $image_count; $x++) {
$file_name = $_FILES['images1']['name'][$x];
$file_size = $_FILES['images1']['size'][$x];
$file_tmp = $_FILES['images1']['tmp_name'];
//$ext = substr($file_name, strlen($file_name)-4,strlen($file_name));
$ext = explode(".", $file_name);
$file_ext = strtolower(end($ext));
echo $file_ext;
if (!in_array($file_ext, $allowed_extensions)) {
die("Only jpg, jpeg, png, gif, and bmp files allowed!");
} elseif ($file_size > 5000000) {
die("File size limit (5MB) exceed!");
}
}
}
//user has filled in all required fields
//validate and sanitize, store to variables
$sub_category = filter_input(INPUT_POST, 'sub_category', FILTER_SANITIZE_STRING);
$location = filter_input(INPUT_POST, 'location', FILTER_SANITIZE_STRING);
$title = filter_input(INPUT_POST, 'title', FILTER_SANITIZE_STRING);
$price = filter_input(INPUT_POST, 'price', FILTER_SANITIZE_NUMBER_FLOAT);
$description = filter_input(INPUT_POST, 'description', FILTER_SANITIZE_STRING);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);
$timestamp = date("Y-m-d H:i:s");
$terms = '1';
//retrieve Location_ID from Location table for Posts table
$sql1 = "SELECT Location_ID FROM Location WHERE LocationName = '$location'";
$query1 = mysqli_query($conn, $sql1) or die(mysqli_error($conn));
$result1 = mysqli_fetch_assoc($query1);
$location_id = $result1["Location_ID"];
//retrieve Subcategory_ID from SubCategory table for Posts table
$sql2 = "SELECT SubCategory_ID FROM SubCategory WHERE SubCategoryName = '$sub_category'";
$query2 = mysqli_query($conn, $sql2);
$result2 = mysqli_fetch_assoc($query2);
$subcategory_id = $result2["SubCategory_ID"];
/*
//save to Posts table
mysqli_query($conn, "INSERT INTO Posts
(Location_ID, title, price, description, email, SubCategory_ID, TimeStamp, Agreement)
VALUES
('" . $location_id . "', '" . $title . "', '" . $price . "', '". $description . "', '" . $email ."',"
. "'" . $subcategory_id ."', '" . $timestamp ."', '" . $terms . "')")
OR die(mysqli_error($conn));*/
**//query for insert with no images
$ins_query_fields = "Location_ID, Title, Price, Description, Email, SubCategory_ID,TimeStamp, Agreement";
$ins_query_vals = "?,?,?,?,?,?,?,?";
$type_args = "ssssssss";
$bind_vars = array($location_id, $title, $price, $description, $email, $subcategory_id, $timestamp, $terms);
$tmp_name_array = array();
$pic_name_array = array();
//print_r($_FILES['images1']['tmp_name']);
//prepare query based on number of images
if ($image_count > 0) {
$i = 1;
for($n = 0; $n < $image_count; $n++) {
$ins_query_fields .= ", Image_" . $i;
array_push($pic_name_array, "Image_". $i);
$ins_query_vals .= ",?";
$type_args .= "s";
${"Image_". $i} = $_FILES['images1']['tmp_name'][$n];
array_push($tmp_name_array, ${"Image_". $i});
$i++;
}
$bind_vars = array_merge($bind_vars, $tmp_name_array);
}
**//save image files to Posts table
///////////////////////////////////////
$stmt = $conn->prepare("INSERT INTO Posts($ins_query_fields) VALUES($ins_query_vals)");
//
//bind params by reference
$inputArray[] = &$type_args;
$j = count($bind_vars);
for($i=0; $i < $j; $i++) {
$inputArray[] = &$bind_vars[$i];
}
//print_r($inputArray);
//use call_user_func_array
call_user_func_array(array($stmt, 'bind_param'), $inputArray);
//$stmt->execute();
//print_r($bind_vars);
print_r($tmp_name_array);
if ($image_count > 0) {
$index = count($bind_vars) - $image_count - 1;
for($i = 0; $i < $image_count; $i++) {
$contents = $tmp_name_array[$i];
//$fp = fopen($bind_vars[($index) + $i], "r");
$fp = fopen($contents, "r");
$size = 0;
while ($data = fread($fp, 1024)) {
$size += strlen($data);
$stmt->send_long_data($index, $data);
}
}
}
if ($stmt->execute()) {
} else {
die($conn->error);
}****
echo 'Your post has been saved.<br/>';
echo '<br/>';
echo '<a href="index.php">Go to Main Page</a>';
?>**
好吧，我试图将数据上传(它是固定数量的变量)和图像blob上传(我已经尝试通过循环)分开.第一个数据发布，图像不发布.这样甚至可行吗?关于这一点，必须有一些我不理解的基本原则.这是修改后的代码，省略了验证步骤.
Ok, I tried to separate the data upload, which is a fixed number of variables, and the image blob uploads, which i have tried doing with a loop. The first data posts, the images do not. Is this even workable this way? There must be some fundamental principle about this that I am not understanding. Here is the revised code, omitting the validation steps.
``if ($image_count > 0) {
$i = 1;
$pic_query_holder_x = "";
$tmp_name_array = array();
$pic_in_fields = array();
$pic_type_args = "";
for($n = 0; $n < $image_count; $n++) {
//$ins_query_fields .= ", Image_" . $i;
array_push($pic_in_fields, "Image_". $i);
$pic_query_holder_x .= ",?";
$pic_type_args .= "s";
${"Image_". $i} = $_FILES['images1']['tmp_name'][$n];
array_push($tmp_name_array, ${"Image_". $i});
$i++;
}
$pic_query_holder = ltrim($pic_query_holder_x, ',');
$pic_bind_vars = $tmp_name_array;
echo '<br/>';
echo $pic_query_holder;
echo '<br/>';
print_r($tmp_name_array);
}
//save image files to Posts table
///////////////////////////////////////
$stmt = $conn->prepare("INSERT INTO Posts($ins_query_fields)
VALUES($ins_query_vals)");
//
//bind params by reference
$inputArray[] = &$type_args;
$j = count($bind_vars);
for($i=0; $i < $j; $i++) {
$inputArray[] = &$bind_vars[$i];
}
//use call_user_func_array
call_user_func_array(array($stmt, 'bind_param'), $inputArray);
$stmt->execute();
//$index = count($bind_vars) - $image_count -1;
//$fp = fopen($tmp_name_array[$index], "r");
//$stmt->execute();
//print_r($pic_in_fields);
//print_r($pic_query_holder);
if ($image_count > 0) {
//bind params
$in_array[] = &$pic_type_args;
$k = count($tmp_name_array);
for ($i=0; $i < $k; $i++) {
$in_array[] = &$tmp_name_array[$i];
}
//$index = count($tmp_name_array) - $image_count - 1;
for($i = 0; $i < $image_count; $i++) {
//prepare statement
$go_pics = $conn->prepare("INSERT INTO Posts($pic_in_fields[$i]) VALUES(?)");
$contents = $tmp_name_array[$i];
//$fp = fopen($bind_vars[($index) + $i], "r");
$fs = fopen($contents, "r");
$size = 0;
while ($data = fread($fs, 1024)) {
$size += strlen($data);
$go_pics->send_long_data($i, $data);
}
//print_r($in_array);
$go_pics->execute();
}
}
enter code here
推荐答案
您可以在下面尝试修改此工作模板.这使用 send_long_data()将图像上传到数据库.这样，只需一个查询即可添加一条具有不同数据类型的列的记录.
You can try tinker with this working template below. This uses send_long_data() to upload images to database. This adds a record with columns of different datatypes in just one query.
我不认为不需要使用 call_user_func_array().
<?php
$conn = new mysqli("127.0.0.1", "root", "", "db");
if(isset($_POST['submit'])) {
$null1 = NULL;
$null2 = NULL;
$null3 = NULL;
$null4 = NULL;
$title = isset($_POST['title']) ? $_POST['title'] : '';
$email = isset($_POST['email']) ? $_POST['email'] : '';
$stmt = $conn->prepare("INSERT INTO Posts (Image_1, Image_2, Image_3, Image_4, title, email ) VALUES (?,?,?,?,?,?);");
$stmt->bind_param("bbbbss", $null1, $null2, $null3, $null4, $title, $email );
for($i = 0; $i < count( $_FILES['images1']['tmp_name'] ); $i++) {
if(!empty($_FILES['images1']['tmp_name'][$i])) {
$target_file = $_FILES['images1']['tmp_name'][$i];
$fp = fopen($target_file, "r");
while (!feof($fp)) {
$stmt->send_long_data($i, fread($fp, 8192));
}
fclose($fp);
unlink($_FILES['images1']['tmp_name'][$i]);
echo "Uploading image blob success!<br/>\n";
}
}
$stmt->execute();
$stmt->close();
$conn->close();
}
?>
<form action="" method="post" enctype="multipart/form-data">
<input type="text" name="title" value="this is the title"/><br/>
<input type="text" name="email" value="john@yahoo.com"/><br/>
<input type="file" name="images1[]" value=""/><br/>
<input type="file" name="images1[]" value=""/><br/>
<input type="file" name="images1[]" value=""/><br/>
<input type="file" name="images1[]" value=""/><br/><br/>
<input type="submit" name="submit" value="Upload Data"/>
</form>
这篇关于当某些输入为blob并且必须在PHP中发送send_long_data()时，如何绑定不同数量的输入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
