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📁 ..
📁 Calculation
📁 Cell
📁 Chart
📁 Collection
📄 Comment.php(5.61 KB)
📁 Document
📄 DocumentGenerator.php(3.45 KB)
📄 Exception.php(83 B)
📄 HashTable.php(3.54 KB)
📁 Helper
📄 IComparable.php(182 B)
📄 IOFactory.php(6.41 KB)
📄 NamedRange.php(4.66 KB)
📁 Reader
📄 ReferenceHelper.php(42.83 KB)
📁 RichText
📄 Settings.php(4.59 KB)
📁 Shared
📄 Spreadsheet.php(36.66 KB)
📁 Style
📁 Worksheet
📁 Writer

Editing: Settings.php

<?php

namespace PhpOffice\PhpSpreadsheet;

use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Chart\Renderer\IRenderer;
use PhpOffice\PhpSpreadsheet\Collection\Memory;
use Psr\SimpleCache\CacheInterface;

class Settings
{
    /**
     * Class name of the chart renderer used for rendering charts
     * eg: PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph.
     *
     * @var string
     */
    private static $chartRenderer;

/**
     * Default options for libxml loader.
     *
     * @var int
     */
    private static $libXmlLoaderOptions = null;

/**
     * Allow/disallow libxml_disable_entity_loader() call when not thread safe.
     * Default behaviour is to do the check, but if you're running PHP versions
     *      7.2 < 7.2.1
     * then you may need to disable this check to prevent unwanted behaviour in other threads
     * SECURITY WARNING: Changing this flag is not recommended.
     *
     * @var bool
     */
    private static $libXmlDisableEntityLoader = true;

/**
     * The cache implementation to be used for cell collection.
     *
     * @var CacheInterface
     */
    private static $cache;

/**
     * Set the locale code to use for formula translations and any special formatting.
     *
     * @param string $locale The locale code to use (e.g. "fr" or "pt_br" or "en_uk")
     *
     * @return bool Success or failure
     */
    public static function setLocale($locale)
    {
        return Calculation::getInstance()->setLocale($locale);
    }

/**
     * Identify to PhpSpreadsheet the external library to use for rendering charts.
     *
     * @param string $rendererClass Class name of the chart renderer
     *    eg: PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph
     */
    public static function setChartRenderer($rendererClass): void
    {
        if (!is_a($rendererClass, IRenderer::class, true)) {
            throw new Exception('Chart renderer must implement ' . IRenderer::class);
        }

self::$chartRenderer = $rendererClass;
    }

/**
     * Return the Chart Rendering Library that PhpSpreadsheet is currently configured to use.
     *
     * @return null|string Class name of the chart renderer
     *    eg: PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph
     */
    public static function getChartRenderer()
    {
        return self::$chartRenderer;
    }

/**
     * Set default options for libxml loader.
     *
     * @param int $options Default options for libxml loader
     */
    public static function setLibXmlLoaderOptions($options): void
    {
        if ($options === null && defined('LIBXML_DTDLOAD')) {
            $options = LIBXML_DTDLOAD | LIBXML_DTDATTR;
        }
        self::$libXmlLoaderOptions = $options;
    }

/**
     * Get default options for libxml loader.
     * Defaults to LIBXML_DTDLOAD | LIBXML_DTDATTR when not set explicitly.
     *
     * @return int Default options for libxml loader
     */
    public static function getLibXmlLoaderOptions()
    {
        if (self::$libXmlLoaderOptions === null && defined('LIBXML_DTDLOAD')) {
            self::setLibXmlLoaderOptions(LIBXML_DTDLOAD | LIBXML_DTDATTR);
        } elseif (self::$libXmlLoaderOptions === null) {
            self::$libXmlLoaderOptions = true;
        }

return self::$libXmlLoaderOptions;
    }

/**
     * Enable/Disable the entity loader for libxml loader.
     * Allow/disallow libxml_disable_entity_loader() call when not thread safe.
     * Default behaviour is to do the check, but if you're running PHP versions
     *      7.2 < 7.2.1
     * then you may need to disable this check to prevent unwanted behaviour in other threads
     * SECURITY WARNING: Changing this flag to false is not recommended.
     *
     * @param bool $state
     */
    public static function setLibXmlDisableEntityLoader($state): void
    {
        self::$libXmlDisableEntityLoader = (bool) $state;
    }

/**
     * Return the state of the entity loader (disabled/enabled) for libxml loader.
     *
     * @return bool $state
     */
    public static function getLibXmlDisableEntityLoader()
    {
        return self::$libXmlDisableEntityLoader;
    }

/**
     * Sets the implementation of cache that should be used for cell collection.
     */
    public static function setCache(CacheInterface $cache): void
    {
        self::$cache = $cache;
    }

/**
     * Gets the implementation of cache that should be used for cell collection.
     *
     * @return CacheInterface
     */
    public static function getCache()
    {
        if (!self::$cache) {
            self::$cache = new Memory();
        }

return self::$cache;
    }
}

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Editing: Settings.php

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