Php 如何在laravel中将文件写入桌面？

我正在为我的数据库写备份

我想如果点击一个按钮，应用程序会将数据库导出到桌面

        $get_all_table_query = "SHOW TABLES";
    $result = DB::select(DB::raw($get_all_table_query));

    $tables = [
        'users',
        'migrations'
    ];

    $structure = '';
    $data = '';
    foreach ($tables as $table) {
        $show_table_query = "SHOW CREATE TABLE " . $table . "";

        $show_table_result = DB::select(DB::raw($show_table_query));

        foreach ($show_table_result as $show_table_row) {
            $show_table_row = (array)$show_table_row;
            $structure .= "\n\n" . $show_table_row["Create Table"] . ";\n\n";
        }
        $select_query = "SELECT * FROM " . $table;
        $records = DB::select(DB::raw($select_query));

        foreach ($records as $record) {
            $record = (array)$record;
            $table_column_array = array_keys($record);
            foreach ($table_column_array as $key => $name) {
                $table_column_array[$key] = '`' . $table_column_array[$key] . '`';
            }

            $table_value_array = array_values($record);
            $data .= "\nINSERT INTO $table (";

            $data .= "" . implode(", ", $table_column_array) . ") VALUES \n";

            foreach($table_value_array as $key => $record_column)
                $table_value_array[$key] = addslashes($record_column);

            $data .= "('" . wordwrap(implode("','", $table_value_array),400,"\n",TRUE) . "');\n";
        }
    }
    $file_name = dirname("C:\Users\ADC-2\Desktop") .'/database_backup_on_' . date('y_m_d') . '.sql';
    $file_handle = fopen($file_name, 'w + ');

    $output = $structure . $data;
    fwrite($file_handle, $output);
    fclose($file_handle);
    echo "DB backup ready";

如果我使用laravel数据库目录路径，应用程序将导出数据库目录中的文件

但是，如果我将路径更改为桌面位置，则桌面上不会显示任何内容

        $get_all_table_query = "SHOW TABLES";
    $result = DB::select(DB::raw($get_all_table_query));

    $tables = [
        'users',
        'migrations'
    ];

    $structure = '';
    $data = '';
    foreach ($tables as $table) {
        $show_table_query = "SHOW CREATE TABLE " . $table . "";

        $show_table_result = DB::select(DB::raw($show_table_query));

        foreach ($show_table_result as $show_table_row) {
            $show_table_row = (array)$show_table_row;
            $structure .= "\n\n" . $show_table_row["Create Table"] . ";\n\n";
        }
        $select_query = "SELECT * FROM " . $table;
        $records = DB::select(DB::raw($select_query));

        foreach ($records as $record) {
            $record = (array)$record;
            $table_column_array = array_keys($record);
            foreach ($table_column_array as $key => $name) {
                $table_column_array[$key] = '`' . $table_column_array[$key] . '`';
            }

            $table_value_array = array_values($record);
            $data .= "\nINSERT INTO $table (";

            $data .= "" . implode(", ", $table_column_array) . ") VALUES \n";

            foreach($table_value_array as $key => $record_column)
                $table_value_array[$key] = addslashes($record_column);

            $data .= "('" . wordwrap(implode("','", $table_value_array),400,"\n",TRUE) . "');\n";
        }
    }
    $file_name = dirname("C:\Users\ADC-2\Desktop") .'/database_backup_on_' . date('y_m_d') . '.sql';
    $file_handle = fopen($file_name, 'w + ');

    $output = $structure . $data;
    fwrite($file_handle, $output);
    fclose($file_handle);
    echo "DB backup ready";

它将显示DB backup ready（数据库备份就绪），但桌面上没有显示任何内容。

        $get_all_table_query = "SHOW TABLES";
    $result = DB::select(DB::raw($get_all_table_query));

    $tables = [
        'users',
        'migrations'
    ];

    $structure = '';
    $data = '';
    foreach ($tables as $table) {
        $show_table_query = "SHOW CREATE TABLE " . $table . "";

        $show_table_result = DB::select(DB::raw($show_table_query));

        foreach ($show_table_result as $show_table_row) {
            $show_table_row = (array)$show_table_row;
            $structure .= "\n\n" . $show_table_row["Create Table"] . ";\n\n";
        }
        $select_query = "SELECT * FROM " . $table;
        $records = DB::select(DB::raw($select_query));

        foreach ($records as $record) {
            $record = (array)$record;
            $table_column_array = array_keys($record);
            foreach ($table_column_array as $key => $name) {
                $table_column_array[$key] = '`' . $table_column_array[$key] . '`';
            }

            $table_value_array = array_values($record);
            $data .= "\nINSERT INTO $table (";

            $data .= "" . implode(", ", $table_column_array) . ") VALUES \n";

            foreach($table_value_array as $key => $record_column)
                $table_value_array[$key] = addslashes($record_column);

            $data .= "('" . wordwrap(implode("','", $table_value_array),400,"\n",TRUE) . "');\n";
        }
    }
    $file_name = dirname("C:\Users\ADC-2\Desktop") .'/database_backup_on_' . date('y_m_d') . '.sql';
    $file_handle = fopen($file_name, 'w + ');

    $output = $structure . $data;
    fwrite($file_handle, $output);
    fclose($file_handle);
    echo "DB backup ready";

使用

而不是

"C:\Users\ADC-2\Desktop"

---

从不设置数据库上的备份。并且有一个不必要的尾随

”

供参考，可用于backups@brombeer我已经更新了我的问题。我想在本地的laravel应用程序中进行调试，您进行过调试吗？为什么在

$file\u name

中使用

dirname（）

？你检查权限了吗？您的脚本是否允许写入“桌面”？@茫然而困惑地工作。谢谢