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Implementation of simple upload function in PHP development
2022-07-28 05:05:00 【A dream against the sky】
The first 1 Chapter PHP Development of simple upload function
1.1 PHP Upload principle and implementation of file upload
file.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Upload files </title>
</head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
Please select the file to upload ：<br>
<input type="file" name="myFile"><br>
<input type="submit" value=" Upload ">
</form>
</body>
</html>
upload.php：
<?php
header("content-type:text/html;charset=utf-8");
// File upload processing program
// $_FILES File upload variables
//echo "<pre>";
//var_dump($_FILES);
//exit();
//echo "</pre>";
// Handling upload files
$filename = $_FILES['myFile']['name'];
$type = $_FILES['myFile']['type'];
$tmp_name = $_FILES['myFile']['tmp_name'];
$size = $_FILES['myFile']['size'];
$error = $_FILES['myFile']['error'];
// Move the temporary files on the server to the specified location
move_uploaded_file($tmp_name, "upload/".$filename); // Folders should be created in advance
// Check according to our errors or report to the user directly
if ($error == 0) {
echo " Upload successful ！!";
} else {
switch ($error) {
case 1:
echo " Exceeded the maximum upload file , Please upload 2M The following documents ！";
break;
case 2:
echo " Too many uploaded files ！";
break;
case 3:
echo " The file has not been uploaded ！";
break;
case 4:
echo " No upload file selected ！";
break;
case 5:
echo " The upload file is 0！";
break;
}
}
?>
1.2 PHP Realize the upload limit of file upload
file2.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Upload files （ Client limitations ）</title>
</head>
<body>
<form action="upload2.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="101321">
Please select the file to upload ：
<input type="file" name="myFile" accept="image/jpeg,image/gif,text/html"><br>
<input type="submit" value=" Upload ">
</form>
</body>
</html>
upload2.php：
<?php
header('content-type:text/html;charset=utf-8');
// Receive the file , Temporary file information
$file_info = $_FILES['myFile']; // Dimension reduction operation
$file_name = $file_info['name'];
$tmp_name = $file_info['tmp_name'];
$size = $file_info['size'];
$type = $file_info['type'];
$error = $file_info['error'];
// Set limits on the server side
$maxsize = 10485760; // 10M,10*1024*1024
$allowExt = array('jpeg','jpg','png','gif'); // The types of files allowed to be uploaded （ Extension ）
$ext = pathinfo($file_name, PATHINFO_EXTENSION); // Extract the extension of the uploaded file
// Target storage folder
$path = "uploads";
if (!file_exists($path)) {
// If the directory does not exist , Create
mkdir($path, 0777, true); // Create directory
chmod($path, 0777); // Modify file mode , Everyone has read 、 Write 、 Executive authority
}
// Get a unique file name , Prevent overwriting due to the same file name
$uniName = md5(uniqid(microtime(true),true)).".$ext"; // md5 encryption ,uniqid Produce a unique id,microtime Prefix
// Destination file address
$destination = $path."/".$uniName;
// When the file is uploaded successfully , Save to temporary folder , The server starts to judge
if ($error===0) {
if ($size > $maxsize) {
exit(" The upload file is too large ！");
}
if (!in_array($ext, $allowExt)) {
exit(" Illegal file type ！");
}
if (!is_uploaded_file($tmp_name)) {
exit(" Wrong upload method , Please use post The way ！");
}
// Determine whether it is a real picture （ Prevent viruses disguised as pictures
if (!getimagesize($tmp_name)) {
// getimagesize by true Returns an array , Otherwise return to false
exit(" It's not really a picture type ！");
}
// move_uploaded_file($tmp_name, "upload/".$file_name);
if (@move_uploaded_file($tmp_name, $destination)) {
// @ Error suppressor , Don't let users see the warning
echo " file ".$file_name." Upload successful ！";
} else {
echo " file ".$file_name." Upload failed ！";
}
} else {
switch ($error) {
case 1:
echo " The maximum number of uploaded files has been exceeded , Please upload 2M The following documents ！";
break;
case 2:
echo " Too many uploaded files , You can only upload files at a time, and it must not exceed 20 individual ！";
break;
case 3:
echo " The file was not completely uploaded , Please try again ！";
break;
case 4:
echo " No upload file selected ！";
break;
case 7:
echo " No temporary folders ！";
break;
}
}
1.3 PHP Realize the package upload function of file upload
file3.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Upload files （ Client limitations ）</title>
</head>
<body>
<form action="upload3.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="101321">
Please select the file to upload ：
<input type="file" name="myFile" accept="image/jpeg,image/gif,text/html"><br>
<input type="submit" value=" Upload ">
</form>
</body>
</html>
file_upload.php：
<?php
function uploadFile ($file_info, $path, $maxsize, $allowExt) {
header('content-type:text/html;charset=utf-8');
// Receive the file , Temporary file information
$file_name = $file_info['name'];
$tmp_name = $file_info['tmp_name'];
$size = $file_info['size'];
$type = $file_info['type'];
$error = $file_info['error'];
// Set limits on the server side
$ext = pathinfo($file_name, PATHINFO_EXTENSION); // Extract the extension of the uploaded file
// Target storage folder
if (!file_exists($path)) {
// If the directory does not exist , Create
mkdir($path, 0777, true); // Create directory
chmod($path, 0777); // Modify file mode , Everyone has read 、 Write 、 Executive authority
}
// Get a unique file name , Prevent overwriting due to the same file name
$uniName = md5(uniqid(microtime(true),true)).".$ext"; // md5 encryption ,uniqid Produce a unique id,microtime Prefix
// Destination file address
$destination = $path."/".$uniName;
// When the file is uploaded successfully , Save to temporary folder , The server starts to judge
if ($error===0) {
if ($size > $maxsize) {
exit(" The upload file is too large ！");
}
if (!in_array($ext, $allowExt)) {
exit(" Illegal file type ！");
}
if (!is_uploaded_file($tmp_name)) {
exit(" Wrong upload method , Please use post The way ！");
}
// Determine whether it is a real picture （ Prevent viruses disguised as pictures
if (!getimagesize($tmp_name)) {
// getimagesize by true Returns an array , Otherwise return to false
exit(" It's not really a picture type ！");
}
// move_uploaded_file($tmp_name, "upload/".$file_name);
if (@move_uploaded_file($tmp_name, $destination)) {
// @ Error suppressor , Don't let users see the warning
echo " file ".$file_name." Upload successful ！";
} else {
echo " file ".$file_name." Upload failed ！";
}
} else {
switch ($error) {
case 1:
echo " The maximum number of uploaded files has been exceeded , Please upload 2M The following documents ！";
break;
case 2:
echo " Too many uploaded files , You can only upload files at a time, and it must not exceed 20 individual ！";
break;
case 3:
echo " The file was not completely uploaded , Please try again ！";
break;
case 4:
echo " No upload file selected ！";
break;
case 7:
echo " No temporary folders ！";
break;
}
}
return $destination;
}
upload3.php：
<?php
header('content-type:text/html;charset=utf-8');
// Initialization of related variables
$file_info = $_FILES['myFile']; // Dimension reduction operation
$maxsize = 10485760; // 10M,10*1024*1024
$allowExt = array('jpeg','jpg','png','gif'); // The types of files allowed to be uploaded （ Extension ）
$path = "uploads";
// Introduce file upload function
include_once 'file_upload.php';
uploadFile($file_info, $path, $maxsize, $allowExt);
?>
1.4 PHP Realize the uploading of many files
file4.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Multiple file upload </title>
</head>
<body>
<form action="upload4.php" method="post" enctype="multipart/form-data">
Please select the file to upload ：<br>
<input type="file" name="myFile1"><br>
Please select the file to upload ：<br>
<input type="file" name="myFile2"><br>
Please select the file to upload ：<br>
<input type="file" name="myFile3"><br>
Please select the file to upload ：<br>
<input type="file" name="myFile4"><br>
Please select the file to upload ：<br>
<input type="file" name="myFile5"><br>
Please select the file to upload ：<br>
<input type="file" name="myFile6"><br>
<input type="submit" value=" Upload ">
</form>
</body>
</html>
upload4.php：
<?php
header("content-type:text/html;charset=utf-8");
include_once 'file_upload.php';
// Initialization of related variables
$maxsize = 10485760; // 10M,10*1024*1024
$allowExt = array('jpeg','jpg','png','gif'); // The types of files allowed to be uploaded （ Extension ）
$path = "uploads";
foreach ($_FILES as $file_info) {
$file[] = uploadFile($file_info, $path, $maxsize, $allowExt);
}
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