[英]Resize image before upload
所以我有一個圖像上傳腳本,問題是我想在上傳之前調整圖像的大小。 這是我現在擁有的代碼,
<?php
session_start();
$username = $_SESSION['user'];
include_once 'db.php';
define("UPLOAD_DIR", "uploads/");
$fileType = exif_imagetype($_FILES["myFile"]["tmp_name"]);
$allowed = array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG);
if (!in_array($fileType, $allowed)) {
header('Location: edit.php');
exit();
}
if (!empty($_FILES["myFile"])) {
$myFile = $_FILES["myFile"];
if ($myFile["error"] !== UPLOAD_ERR_OK) {
echo "<p>An error occurred.</p>";
exit;
}
// ensure a safe filename
$name = preg_replace("/[^A-Z0-9._-]/i", "_", $myFile["name"]);
//Start resize
$filename = $myFile;
$width = 200;
$height = 200;
header('Content-Type: image/jpeg');
list($width_orig, $height_orig) = getimagesize($filename);
$ratio_orig = $width_orig/$height_orig;
if ($width/$height > $ratio_orig) {
$width = $height*$ratio_orig;
} else {
$height = $width/$ratio_orig;
}
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
imagejpeg($image_p, null, 100);
// don't overwrite an existing file
$i = 0;
$parts = pathinfo($name);
while (file_exists(UPLOAD_DIR . $name)) {
$i++;
$name = $parts["filename"] . "-" . $i . "." . $parts["extension"];
}
// preserve file from temporary directory
$success = move_uploaded_file($myFile["tmp_name"],
UPLOAD_DIR . $name);
if (!$success) {
echo "<p>Unable to save file.</p>";
exit;
}
// set proper permissions on the new file
chmod(UPLOAD_DIR . $name, 0644);
$upload_url = 'http://localhost/uploads/'.$name;
$stmt = $con->prepare("UPDATE users SET profile_picture=:picture WHERE username=:username;");
$stmt->bindValue(':picture', $upload_url, PDO::PARAM_STR);
$stmt->bindValue(':username', $username, PDO::PARAM_STR);
$stmt->execute();
}
?>
<a href="<?php echo $upload_url ?>">Click here</a>
這就是我得到的
警告:session_start():無法發送會話緩存限制器-行2上/Users/matt/Desktop/Likers/upload.php中已發送的標頭(輸出從/Users/matt/Desktop/Likers/upload.php:1開始)
警告:無法修改標頭信息-第32行的/Users/matt/Desktop/Likers/upload.php中已經發送過的標頭(輸出始於/Users/matt/Desktop/Likers/upload.php:1)
警告:getimagesize()期望參數1為字符串,在第34行的/Users/matt/Desktop/Likers/upload.php中給出的數組
警告:在第37行的/Users/matt/Desktop/Likers/upload.php中被零除
警告:imagecreatetruecolor():第45行的/Users///Desktop/Likers/upload.php中的圖像尺寸無效
警告:imagecreatefromjpeg()期望參數1為字符串,在第46行的/Users///Desktop/Likers/upload.php中給出的數組
警告:imagecopyresampled()期望參數1為資源,在第47行的/Users///Desktop/Likers/upload.php中給出布爾值
警告:imagejpeg()期望參數1為資源,在第49行的/Users///Desktop/Likers/upload.php中提供布爾值
我不太確定該怎么辦。 我這樣做正確嗎? 有一個更好的方法嗎? 任何幫助都會很棒。
此錯誤說明了問題:
Warning: getimagesize() expects parameter 1 to be string, array given in /Users/matt/Desktop/Likers/upload.php on line 34
您要提供整個$_FILES["myFile"]
而不是文件名。 檢查第27行:
$filename = $myFile;
它應該是:
$filename = $myFile['tmp_name'];
希望能幫助到你 :)
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