/home/kueuepay/public_html/config/excel.php
<?php

use Maatwebsite\Excel\Excel;

return [
    'exports' => [

        /*
        |--------------------------------------------------------------------------
        | Chunk size
        |--------------------------------------------------------------------------
        |
        | When using FromQuery, the query is automatically chunked.
        | Here you can specify how big the chunk should be.
        |
        */
        'chunk_size'             => 1000,

        /*
        |--------------------------------------------------------------------------
        | Pre-calculate formulas during export
        |--------------------------------------------------------------------------
        */
        'pre_calculate_formulas' => false,

        /*
        |--------------------------------------------------------------------------
        | Enable strict null comparison
        |--------------------------------------------------------------------------
        |
        | When enabling strict null comparison empty cells ('') will
        | be added to the sheet.
        */
        'strict_null_comparison' => false,

        /*
        |--------------------------------------------------------------------------
        | CSV Settings
        |--------------------------------------------------------------------------
        |
        | Configure e.g. delimiter, enclosure and line ending for CSV exports.
        |
        */
        'csv'                    => [
            'delimiter'              => ',',
            'enclosure'              => '"',
            'line_ending'            => PHP_EOL,
            'use_bom'                => false,
            'include_separator_line' => false,
            'excel_compatibility'    => false,
            'output_encoding'        => '',
            'test_auto_detect'       => true,
        ],

        /*
        |--------------------------------------------------------------------------
        | Worksheet properties
        |--------------------------------------------------------------------------
        |
        | Configure e.g. default title, creator, subject,...
        |
        */
        'properties'             => [
            'creator'        => '',
            'lastModifiedBy' => '',
            'title'          => '',
            'description'    => '',
            'subject'        => '',
            'keywords'       => '',
            'category'       => '',
            'manager'        => '',
            'company'        => '',
        ],
    ],

    'imports'            => [

        /*
        |--------------------------------------------------------------------------
        | Read Only
        |--------------------------------------------------------------------------
        |
        | When dealing with imports, you might only be interested in the
        | data that the sheet exists. By default we ignore all styles,
        | however if you want to do some logic based on style data
        | you can enable it by setting read_only to false.
        |
        */
        'read_only' => true,

        /*
        |--------------------------------------------------------------------------
        | Ignore Empty
        |--------------------------------------------------------------------------
        |
        | When dealing with imports, you might be interested in ignoring
        | rows that have null values or empty strings. By default rows
        | containing empty strings or empty values are not ignored but can be
        | ignored by enabling the setting ignore_empty to true.
        |
        */
        'ignore_empty' => false,

        /*
        |--------------------------------------------------------------------------
        | Heading Row Formatter
        |--------------------------------------------------------------------------
        |
        | Configure the heading row formatter.
        | Available options: none|slug|custom
        |
        */
        'heading_row' => [
            'formatter' => 'slug',
        ],

        /*
        |--------------------------------------------------------------------------
        | CSV Settings
        |--------------------------------------------------------------------------
        |
        | Configure e.g. delimiter, enclosure and line ending for CSV imports.
        |
        */
        'csv'         => [
            'delimiter'        => null,
            'enclosure'        => '"',
            'escape_character' => '\\',
            'contiguous'       => false,
            'input_encoding'   => 'UTF-8',
        ],

        /*
        |--------------------------------------------------------------------------
        | Worksheet properties
        |--------------------------------------------------------------------------
        |
        | Configure e.g. default title, creator, subject,...
        |
        */
        'properties'  => [
            'creator'        => '',
            'lastModifiedBy' => '',
            'title'          => '',
            'description'    => '',
            'subject'        => '',
            'keywords'       => '',
            'category'       => '',
            'manager'        => '',
            'company'        => '',
        ],

    ],

    /*
    |--------------------------------------------------------------------------
    | Extension detector
    |--------------------------------------------------------------------------
    |
    | Configure here which writer/reader type should be used when the package
    | needs to guess the correct type based on the extension alone.
    |
    */
    'extension_detector' => [
        'xlsx'     => Excel::XLSX,
        'xlsm'     => Excel::XLSX,
        'xltx'     => Excel::XLSX,
        'xltm'     => Excel::XLSX,
        'xls'      => Excel::XLS,
        'xlt'      => Excel::XLS,
        'ods'      => Excel::ODS,
        'ots'      => Excel::ODS,
        'slk'      => Excel::SLK,
        'xml'      => Excel::XML,
        'gnumeric' => Excel::GNUMERIC,
        'htm'      => Excel::HTML,
        'html'     => Excel::HTML,
        'csv'      => Excel::CSV,
        'tsv'      => Excel::TSV,

        /*
        |--------------------------------------------------------------------------
        | PDF Extension
        |--------------------------------------------------------------------------
        |
        | Configure here which Pdf driver should be used by default.
        | Available options: Excel::MPDF | Excel::TCPDF | Excel::DOMPDF
        |
        */
        'pdf'      => Excel::DOMPDF,
    ],

    /*
    |--------------------------------------------------------------------------
    | Value Binder
    |--------------------------------------------------------------------------
    |
    | PhpSpreadsheet offers a way to hook into the process of a value being
    | written to a cell. In there some assumptions are made on how the
    | value should be formatted. If you want to change those defaults,
    | you can implement your own default value binder.
    |
    | Possible value binders:
    |
    | [x] Maatwebsite\Excel\DefaultValueBinder::class
    | [x] PhpOffice\PhpSpreadsheet\Cell\StringValueBinder::class
    | [x] PhpOffice\PhpSpreadsheet\Cell\AdvancedValueBinder::class
    |
    */
    'value_binder' => [
        'default' => Maatwebsite\Excel\DefaultValueBinder::class,
    ],

    'cache' => [
        /*
        |--------------------------------------------------------------------------
        | Default cell caching driver
        |--------------------------------------------------------------------------
        |
        | By default PhpSpreadsheet keeps all cell values in memory, however when
        | dealing with large files, this might result into memory issues. If you
        | want to mitigate that, you can configure a cell caching driver here.
        | When using the illuminate driver, it will store each value in the
        | cache store. This can slow down the process, because it needs to
        | store each value. You can use the "batch" store if you want to
        | only persist to the store when the memory limit is reached.
        |
        | Drivers: memory|illuminate|batch
        |
        */
        'driver'     => 'memory',

        /*
        |--------------------------------------------------------------------------
        | Batch memory caching
        |--------------------------------------------------------------------------
        |
        | When dealing with the "batch" caching driver, it will only
        | persist to the store when the memory limit is reached.
        | Here you can tweak the memory limit to your liking.
        |
        */
        'batch'     => [
            'memory_limit' => 60000,
        ],

        /*
        |--------------------------------------------------------------------------
        | Illuminate cache
        |--------------------------------------------------------------------------
        |
        | When using the "illuminate" caching driver, it will automatically use
        | your default cache store. However if you prefer to have the cell
        | cache on a separate store, you can configure the store name here.
        | You can use any store defined in your cache config. When leaving
        | at "null" it will use the default store.
        |
        */
        'illuminate' => [
            'store' => null,
        ],
    ],

    /*
    |--------------------------------------------------------------------------
    | Transaction Handler
    |--------------------------------------------------------------------------
    |
    | By default the import is wrapped in a transaction. This is useful
    | for when an import may fail and you want to retry it. With the
    | transactions, the previous import gets rolled-back.
    |
    | You can disable the transaction handler by setting this to null.
    | Or you can choose a custom made transaction handler here.
    |
    | Supported handlers: null|db
    |
    */
    'transactions' => [
        'handler' => 'db',
        'db'      => [
            'connection' => null,
        ],
    ],

    'temporary_files' => [

        /*
        |--------------------------------------------------------------------------
        | Local Temporary Path
        |--------------------------------------------------------------------------
        |
        | When exporting and importing files, we use a temporary file, before
        | storing reading or downloading. Here you can customize that path.
        |
        */
        'local_path'          => storage_path('framework/cache/laravel-excel'),

        /*
        |--------------------------------------------------------------------------
        | Remote Temporary Disk
        |--------------------------------------------------------------------------
        |
        | When dealing with a multi server setup with queues in which you
        | cannot rely on having a shared local temporary path, you might
        | want to store the temporary file on a shared disk. During the
        | queue executing, we'll retrieve the temporary file from that
        | location instead. When left to null, it will always use
        | the local path. This setting only has effect when using
        | in conjunction with queued imports and exports.
        |
        */
        'remote_disk'         => null,
        'remote_prefix'       => null,

        /*
        |--------------------------------------------------------------------------
        | Force Resync
        |--------------------------------------------------------------------------
        |
        | When dealing with a multi server setup as above, it's possible
        | for the clean up that occurs after entire queue has been run to only
        | cleanup the server that the last AfterImportJob runs on. The rest of the server
        | would still have the local temporary file stored on it. In this case your
        | local storage limits can be exceeded and future imports won't be processed.
        | To mitigate this you can set this config value to be true, so that after every
        | queued chunk is processed the local temporary file is deleted on the server that
        | processed it.
        |
        */
        'force_resync_remote' => null,
    ],
];
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Enhancing Payment Security: The Role of Encryption and Tokenization in Digital Transactions

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational technologies that are pivotal in this effort are encryption and tokenization.
Encryption is a process that transforms data into a secure format, known as ciphertext, which can only be deciphered using a specific decryption key. This means that even if data is intercepted during transmission, it remains unreadable and protected from unauthorized access. Encryption is essential in safeguarding sensitive payment information, such as credit card details and personal data, during online transactions.
Tokenization, on the other hand, involves substituting sensitive data with unique identifiers or "tokens." These tokens serve as placeholders and have no value outside of the specific transaction context. If intercepted, tokens are meaningless and cannot be used to access the original sensitive data. This method significantly reduces the risk of fraud and data breaches, as the actual payment information is not stored or transmitted.
Together, encryption and tokenization form a powerful security framework. Encryption ensures that data is protected during transmission, while tokenization minimizes the risk of exposing sensitive information by replacing it with secure, non-sensitive tokens.
These technologies are integral to modern payment platforms, providing a robust defense against cyber threats. By implementing advanced encryption and tokenization techniques, businesses can enhance the security of digital transactions, ensuring that users' financial and personal information remains safe. This comprehensive approach not only builds user trust but also fortifies the overall security infrastructure of digital payment systems. As cyber threats evolve, the continued advancement of encryption and tokenization will be crucial in maintaining secure and reliable payment processes.

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