Laravel XSS Filtering

xss-filtering.php

<?php

/**
 * Escapes special characters in a string for use in HTML.
 *
 * @param mixed $value The value to be escaped.
 * @param bool $doubleEncode Indicates if existing entities should be encoded or not. Default is true.
 * @return string The escaped string.
 */
function e($value, $doubleEncode = true)
{
    if ($value instanceof DeferringDisplayableValue) {
        $value = $value->resolveDisplayableValue();
    }

    if ($value instanceof Htmlable) {
        return $value->toHtml();
    }

    if ($value instanceof BackedEnum) {
        $value = $value->value;
    }

    return htmlspecialchars($value ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8', $doubleEncode);
}