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我試圖發送一個電子郵件與圖像附件。我可以發送電子郵件，但我沒有顯示圖片，它只是黑色的成功。 php正在接收一個base64字符串，它是一個圖像。另外我想這樣做，而不需要在服務器上存儲任何東西或寫任何東西。有沒有可能的方法來做到這一點？
這就是php的樣子。附加base64時獲取黑色圖片img
<?php
$base64 = $_POST['dataURL'];
//define the receiver of the email
$to = '[email protected]';
//define the subject of the email
$subject = 'Test email with attachment';
//create a boundary string. It must be unique
//so we use the MD5 algorithm to generate a random hash
$random_hash = md5(date('r', time()));
//define the headers we want passed. Note that they are separated with \r\n
$headers = "From:Francisco Granado\r\nReply-To: [email protected]";
//add boundary string and mime type specification
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\"";
//read the atachment file contents into a string,
//encode it with MIME base64,
//and split it into smaller chunks
$attachment = base64_decode($base64);
//define the body of the message.
ob_start(); //Turn on output buffering
?>
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?>"
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
This email have attached a image file
For SED_WE analysis purposes.
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<h1>SED_WE</h1>
<p>This email have attached a image file </p>
<p>For SED_WE analysis purposes.</p>
--PHP-alt-<?php echo $random_hash; ?>--
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: image/jpeg; name="attachment.jpeg"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
<?php echo $attachment; ?>
--PHP-mixed-<?php echo $random_hash; ?>--
<?php
//copy current buffer contents into $message variable and delete current output buffer
$message = ob_get_clean();
//send the email
$mail_sent = @mail($to, $subject, $message, $headers);
//if the message is sent successfully print "Mail sent". Otherwise print "Mail failed"
echo $mail_sent ? "Mail sent" : "Mail failed";
?>
而且，這裏是我的JS：
$(document).ready(function (e) {
var imgBase64;
function imgToBase64(url, callback, outputFormat) {
var canvas = document.createElement('CANVAS'); //Creates variable containing canvas in the DOM
var canvas_context = canvas.getContext('2d'); //Creates canvas environment (context) in 2 dimensions
var img = new Image; // new Image instance
img.crossOrigin = 'Anonymous'; //Cross origin textures from other URL's are permitted (see http://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html) for more information
console.log('ON LOAD IMG');
//Image load trigger, encode image into base64
img.onload = function() {
//Determine canvas height and width
canvas.height = img.height;
canvas.width = img.width;
console.log('Canvas info:\n Height: ' + canvas.height + '\n Width: ' + canvas.width);
//Draws the image raw format
canvas_context.drawImage(img, 0, 0);
var dataURL = canvas.toDataURL(outputFormat || 'image/png'); //THIS IS WHERE THE MAGIC HAPPENS (img encode to base64)
//imgBase64 = dataURL;
$('#show-picture').attr('src', dataURL); //Change source of the #show-picture image tag to the base64 string to show preview to user
console.log(dataURL);
callback.call(this, dataURL); //Callback function @param {dataURL}
// Clean up
canvas = null;
};
img.src = url;
}
//Reads the path to the picture for a preview
function readURL(input) {
if (input.files && input.files[0]) { //if file exist
var reader = new FileReader(); //new instance of the file reader
reader.onload = function (e) { //when the reader loads the chosen file...
imgToBase64(e.target.result, function (dataURL) { //..then the is converted
setDataURL(dataURL);
});
}
reader.readAsDataURL(input.files[0]);
}
}
function setDataURL(dataURL){
imgBase64 = dataURL;
console.log('setDataUrl=>'+imgBase64);
}
$('#take-picture').change(function() {
readURL(this);
console.log('ONLOAD'+imgBase64);
});
$('#uploadImgBtn').on('click',function(){
var base64String= imgBase64.replace(/data:image[^;]+;base64,/,'');
console.log('base64string'+base64String);
$.post('php/mailer.php',base64String,function(data){alert('Success!'); console.log('response: '+data)});
});
});
PS：我已經從其他崗位嘗試不同的東西，但沒有成功，或者他們寫在服務器上，也這是我第一次在PHP所以任何好的建議都非常受歡迎。