我是PHP新手，在将图像上传到服务器之前，正在努力添加文本覆盖。这是我当前的功能，但它不添加文本到图像。
function image_file_upload($conn) {
$target_dir = "../users/images/";
$caption = $_POST['comment'];
$imgFile = $_FILES['user_image']['name'];
$tmp_dir = $_FILES['user_image']['tmp_name'];
$target_file = $target_dir . basename($imgFile);
$uploadOk = 1;
$font_color = bcca;
$background_color = abbc;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
$ext = explode('.',$imgFile);
$file = $target_dir . uniqid() . "." . $ext[1];
$uid = 4;
// Check if image file is a actual image or fake image
$check = getimagesize($tmp_dir);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image.";
$uploadOk = 0;
}
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($tmp_dir, $file)) {
$jpg_image = imagecreatefromjpeg($file);
$white = imagecolorallocate($jpg_image, 255, 255, 255);
$font_path = 'simple.ttf';
$text = "This is a Sunset!";
imagettftext($jpg_image, 10, 0, 0, 0, $white, $font_path, $text);
imagejpeg($jpg_image,$file);
$date = date('Y-m-d H:i:s');
insert_into_post($conn, $uid, 1, $date, $file, $background_color, $font_color, 0 , 0, "image", $caption);
} else {
echo "Sorry, there was an error uploading your file.";
}
}
}
您的代码中遗漏了几个步骤。检查下面的注释代码，看看它是否符合你的要求:
<?php
function image_file_upload($conn) {
// IF WE THERE WAS NO FILE UPLOADED, WE JUST REPORT THAT AND TERMINATE THE FUNCTION IMMEDIATELY:
if(!isset($_FILES['user_image']) && empty($_FILES['user_image'])){
echo "Please, upload a File using the Form....";
return null;
}
$target_dir = "../users/images/";
$caption = $_POST['comment'];
$imgFile = $_FILES['user_image']['name'];
$tmp_dir = $_FILES['user_image']['tmp_name'];
$target_file = $target_dir . basename($imgFile);
$font_color = "#bcca00"; //<== YOUR COLOR SHOULD BE A VALID HEX OR RGB OR HSLA COLOR VALUE
$background_color = "#abbc00"; //<== YOUR COLOR SHOULD BE A VALID HEX OR RGB OR HSLA COLOR VALUE
$fileInfo = new SplFileInfo($imgFile);
$ext = $fileInfo->getExtension();
$file = $target_dir . uniqid() . "." . $ext;
$uid = 4;
$check = getimagesize($tmp_dir);
// CHECK THAT getimagesize RETURNS AN ARRAY OF DATA
if(!empty($check)){
// CHECK THAT THIS WAS AN IMAGE FILE USING THE MIME PROPERTY OF THE $check ARRAY...
if (stristr($check['mime'], "image/")) {
if (move_uploaded_file($tmp_dir, $file)) {
// GRAB A COPY OF THE UPLOADED IMAGE - SO THAT WE CAN ADD TEXT TO IT...
$jpg_image = imagecreatefromjpeg($file);
$white = imagecolorallocate($jpg_image, 255, 255, 255);
$red = imagecolorallocate($jpg_image, 255, 0, 0); //<== RED: JUST FOR TESTING PURPOSES...
$font_path = 'simple.ttf';
$text = "This is a Sunset!";
$date = date('Y-m-d H:i:s');
// ADD TEXT TO THE IMAGE... BE CAREFUL WITH THE X, Y LOCATION...
// YOU MAY NEED TO PLAY AROUND WITH IT A BIT ESPECIALLY CONSIDERING THE FONT-SIZE...
imagettftext($jpg_image, 50, 0, 50, 50, $red, $font_path, $text);
// SAVE BACK THE IMAGE WITH SOME TEXT SUPERIMPOSED ON IT...
imagejpeg($jpg_image, $file);
// INSERT SOME DATA RELATED TO THE UPLOADED IMAGE TO THE DATABASE...
insert_into_post($conn, $uid, 1, $date, $file, $background_color, $font_color, 0, 0, "image", $caption);
}else {
echo "Sorry, there was an error uploading your file.";
}
}else {
echo "File is not an image.";
}
}
}
// CHECK THAT THE FORM WAS SUBMITTED BEFORE RUNNING THE UPLOAD PROCESS...
if(isset($_POST["upload"])){
image_file_upload($connectionHandle);
}
?>
<html>
<form method="post" enctype="multipart/form-data" action="">
<input type="file" name="user_image" value="" id="user_image" /><br /><br />
<input type="submit" name="upload" value="upload" id="upload" />
</form>
</html>