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Edit File: SubstringTransformationsPlugin.php

<?php
/**
 * Abstract class for the substring transformations plugins
 */

declare(strict_types=1);

namespace PhpMyAdmin\Plugins\Transformations\Abs;

use PhpMyAdmin\Plugins\TransformationsPlugin;
use stdClass;
use function htmlspecialchars;
use function mb_strlen;
use function mb_substr;

/**
 * Provides common methods for all of the substring transformations plugins.
 */
abstract class SubstringTransformationsPlugin extends TransformationsPlugin
{
    /**
     * Gets the transformation description of the specific plugin
     *
     * @return string
     */
    public static function getInfo()
    {
        return __(
            'Displays a part of a string. The first option is the number of'
            . ' characters to skip from the beginning of the string (Default 0).'
            . ' The second option is the number of characters to return (Default:'
            . ' until end of string). The third option is the string to append'
            . ' and/or prepend when truncation occurs (Default: "…").'
        );
    }

/**
     * Does the actual work of each specific transformations plugin.
     *
     * @param string        $buffer  text to be transformed
     * @param array         $options transformation options
     * @param stdClass|null $meta    meta information
     *
     * @return string
     */
    public function applyTransformation($buffer, array $options = [], ?stdClass $meta = null)
    {
        // possibly use a global transform and feed it with special options

// further operations on $buffer using the $options[] array.
        $cfg = $GLOBALS['cfg'];
        $options = $this->getOptions($options, $cfg['DefaultTransformations']['Substring']);

if ($options[1] !== 'all') {
            $newtext = mb_substr(
                $buffer,
                $options[0],
                $options[1]
            );
        } else {
            $newtext = mb_substr($buffer, $options[0]);
        }

$length = mb_strlen($newtext);
        $baselength = mb_strlen($buffer);
        if ($length != $baselength) {
            if ($options[0] != 0) {
                $newtext = $options[2] . $newtext;
            }

if ($length + (int) $options[0] != $baselength) {
                $newtext .= $options[2];
            }
        }

return htmlspecialchars($newtext);
    }

/* ~~~~~~~~~~~~~~~~~~~~ Getters and Setters ~~~~~~~~~~~~~~~~~~~~ */

/**
     * Gets the transformation name of the specific plugin
     *
     * @return string
     */
    public static function getName()
    {
        return 'Substring';
    }
}

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