Question

所以我有一个图片上传脚本，问题是我想在上传之前调整图片大小。这是我现在的代码，

<?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>

这就是我得到的

警告：session_start（）：无法发送会话缓存限制器 - 已在/Users/matt/Desktop/Likers/upload.php中发送的标头（输出从/Users/matt/Desktop/Likers/upload.php:1开始）在第2行

警告：无法修改标头信息 - 第32行/Users/matt/Desktop/Likers/upload.php中已经发送的标头（在/Users/matt/Desktop/Likers/upload.php:1中开始输出）< / p>
警告：getimagesize（）要求参数1为字符串，在第34行的/Users/matt/Desktop/Likers/upload.php中给出数组

警告：在第37行的/Users/matt/Desktop/Likers/upload.php中除以零

警告：imagecreatetruecolor（）：第45行/Users///Desktop/Likers/upload.php中的图像尺寸无效

警告：imagecreatefromjpeg（）要求参数1为字符串，在第46行的/Users///Desktop/Likers/upload.php中给出数组

警告：imagecopyresampled（）要求参数1为资源，第47行/Users///Desktop/Likers/upload.php中给出布尔值

警告：imagejpeg（）要求参数1为资源，第49行/Users///Desktop/Likers/upload.php中给出布尔值

我不确定该怎么做。我这样做了吗？有一个更好的方法吗？任何帮助都会很棒。

Answer 1

此错误解释了问题：

Warning: getimagesize() expects parameter 1 to be string, array given in /Users/matt/Desktop/Likers/upload.php on line 34

您只提供整个$_FILES["myFile"]文件名。检查第27行：

$filename = $myFile;

应该是：

$filename = $myFile['tmp_name'];

希望有所帮助：）

上传前调整图像大小

1 个答案: