php attach常见问题-乐工具技术知识

“attach” 在 PHP 中通常与文件操作相关，可能是指将一个文件附加到另一个文件末尾。如果你是在谈论 PHP 的文件上传功能，那么你可能想要使用 move_uploaded_file() 函数来处理上传的文件。这个函数可以将上传的文件移动到指定的目标目录。

如果你遇到了关于 PHP 文件上传的问题，比如文件无法上传、文件大小限制、文件类型限制等，你可以检查以下几点：

确保你的 HTML 表单包含了正确的 enctype="multipart/form-data" 属性，这样才能上传文件。


    Select file to upload:

在 PHP 脚本中检查上传文件的信息，比如大小和类型。

if (isset($_FILES['fileToUpload'])) {
    $target_file = "uploads/" . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = strtolower(pathinfo($target_file, PATHINFO_EXTENSION));

    // Check if file already exists
    if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
    }

    // Check if $uploadOk is set to 0 by an error
    if ($uploadOk == 0) {
        echo "Sorry, your file was not uploaded.";
    } else {
        // Check if $_FILES["fileToUpload"]["error"] is equal to UPLOAD_ERR_OK
        if ($_FILES["fileToUpload"]["error"] == UPLOAD_ERR_OK) {
            // Generate a unique file name to avoid conflicts
            $imageFileName = uniqid("", true) . "." . $imageFileType;
            $target_file = "uploads/" . $imageFileName;

            // Move uploaded file to the target location
            if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
                echo "The file " . htmlspecialchars(basename($_FILES["fileToUpload"]["name"])) . " has been uploaded.";
            } else {
                echo "Sorry, there was an error uploading your file.";
            }
        } else {
            echo "Sorry, there was an error uploading your file. Error code: " . $_FILES["fileToUpload"]["error"];
        }
    }
}