我有一个表格,其中包含一些数据和2个输入用于上传图像,我已经阅读了网站上的其他问题,但确实有很多答案。我只需要在上传之前减小图像的大小,以使用户更快。我不明白的是如何缩小图像并从mailer.php
中检索它。
<?php
$nome = $_POST["nome-locale"];
$email = $_POST["email"];
$telefono = $_POST["telefono"];
$indirizzo = $_POST["indirizzo"];
$civico = $_POST["civico"];
$citta = $_POST["citta"];
$provincia = $_POST["provincia"];
$cap = $_POST["cap"];
$titolare = $_POST["titolare"];
$cf = $_POST["codice_fiscale"];
$declaration = isset($_POST["declaration"]) ? $_POST['declaration'] : 'No';
$newsletter = isset($_POST["newsletter"]) ? $_POST['newsletter'] : 'No';
$data = date('d-m-Y');
$body = "<br>nome-locale:" . $nome . "<br>Email:" . $email . "<br>TelefonoLocale:" . $telefono . "<br>Indirizzo:" . $indirizzo . "<br>Civico:" . $civico . "<br>Città:" . $citta . "<br>Provincia:" . $provincia . "<br>Cap:" . $cap . "<br>Nome titolare:" . $titolare . "<br>CF:" . $cf . "<br>Declaration:" . $declaration . "<br>newsletter:" . $newsletter;
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
// Instantiation and passing `true` enables exceptions
$mail = new PHPMailer(true);
$mail->isSMTP(); // Send using SMTP
$mail->Host = x // Set the SMTP server to send through
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'x // SMTP username
$mail->Password = 'x; // SMTP password
$mail->SMTPSecure = 'ssl'; // Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` also accepted
$mail->Port = 465; // TCP port to connect to
if (array_key_exists('menu1', $_FILES) && array_key_exists('menu2', $_FILES)) {
try {
//Server settings
// First handle the upload
// Don't trust provided filename - same goes for MIME types
// See http://php.net/manual/en/features.file-upload.php#114004 for more thorough upload validation
$menu1_filename = $_FILES['menu1']['name'];
$menu2_filename = $_FILES['menu1']['name'];
$menu1 = tempnam(sys_get_temp_dir(), hash('sha256', $menu1_filename));
$menu2 = tempnam(sys_get_temp_dir(), hash('sha256', $menu2_filename));
if (move_uploaded_file($_FILES['menu1']['tmp_name'], $menu1) &&
move_uploaded_file($_FILES['menu2']['tmp_name'], $menu2)) {
// Upload handled successfully
// Now create a message
//Recipients
$mail->setFrom('feed@vaimenu.it', $data);
$mail->addAddress('feed@vaimenu.it'); // Add a recipient
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = ('Iscrizione: ' . $nome);
$mail->Body = $body;
$mail->AltBody = 'Iscrizione ricevuta da landing page';
// Attach the uploaded file
$mail->AddAttachment($menu1, $menu1_filename);
$mail->AddAttachment($menu2, $menu2_filename);
$mail->send();
$mail->ClearAllRecipients();
$mail->clearAddresses();
$mail->ClearAttachments();
$mail->isHTML(true);
$mail->Subject = ('Benvenuto, ' . $nome);
$mail->setFrom('feed@vaimenu.it', 'Vaimenu.it');
$mail->addAddress($email);
$message = file_get_contents('Benvenuto.html');
$message = str_replace('%Nome%', $nome, $message);
$mail->MsgHtml($message);
if (!$mail->send()) {
$response['error'] = true;
$response['message'] = "Message could not be sent. Some thing went wrong Mailer Error: " . $mail->ErrorInfo;
} else {
$response['success'] = true;
}
} else {
$response['error'] = true;
$response['message'] = 'Failed to move file to ' . $menu1;
}
echo json_encode($response);
} catch (Exception $e) {
$response['error'] = true;
$response['message'] = "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
echo json_encode($response);
}
}
?>
<form role="form" method="post" id="myform" action="mailer.php" enctype="multipart/form-data" >
.......
.......
<div class="form-group was-validated">
<label class="control-label">Menu1</label>
<input type="file" name="menu1" accept=".jpg,.jpeg,.pdf,.png" required>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" style="width: 0%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<br>
<div class="form-group was-validated ">
<label class="control-label">Menu2</label>
<input type="file" name="menu2" accept=".jpg,.jpeg,.pdf,.png" required>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" style="width: 0%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
....
<button class="btn btn-success btn-lg fa-pull-right" type="submit">Finito!</button>
</form>
答案 0 :(得分:0)
此PHP函数将在上传后减小图片大小
<?php
// Compress image
function compressImage($source, $destination, $quality) {
$info = getimagesize($source);
if ($info['mime'] == 'image/jpeg') {
$image = imagecreatefromjpeg($source);
} elseif ($info['mime'] == 'image/gif') {
$image = imagecreatefromgif($source);
} elseif ($info['mime'] == 'image/png') {
$image = imagecreatefrompng($source);
}
imagejpeg($image, $destination, $quality);
}
?>
保存到目录
$img_dir = "img/";
// $img = ""; your image
compressImage($_FILES["img"]["tmp_name"], $img_dir.$img, 60);
最适合10MB以下的图像
答案 1 :(得分:0)
PHP在服务器上运行,除非将映像上载到服务器,否则无法压缩映像。但是您可以在上传之前使用Javascrypt压缩图像。根据您使用的框架,有很多解决方案可以解决此问题。现代网站通常在上传媒体之前先进行压缩,以减少带宽,这与您提到的原因相同。
如果您使用的是React, AngularJS or VueJS
,则可以使用browser-image-compression
npm软件包。该库具有很多功能。您都可以通过降低图像JPEG的质量进行压缩,也可以只更改尺寸。
如果您只关心减小大小(宽度和高度)而与质量无关,则可以使用如图here所示的简单Javascrypt函数。为了方便起见,我正在复制其中的一部分。
// from an input element
var filesToUpload = input.files;
var file = filesToUpload[0];
var img = document.createElement("img");
var reader = new FileReader();
reader.onload = function(e) {img.src = e.target.result}
reader.readAsDataURL(file);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img.width;
var height = img.height;
if (width > height) {
if (width > MAX_WIDTH) {
height *= MAX_WIDTH / width;
width = MAX_WIDTH;
}
} else {
if (height > MAX_HEIGHT) {
width *= MAX_HEIGHT / height;
height = MAX_HEIGHT;
}
}
canvas.width = width;
canvas.height = height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, width, height);
var dataurl = canvas.toDataURL("image/png")