stringhelper.php

<?php
namespace Bitrix\Main\Text;
 
class StringHelper
{
    public static function strtoupper($str)
    {
        static $cache;
 
        if (empty($cache[$str]))
        {
            $cache[$str] = mb_strtoupper($str);
        }
 
        return $cache[$str];
    }
 
    public static function camel2snake($str)
    {
        return mb_strtolower(preg_replace('/(.)([A-Z])/', '$1_$2', $str));
    }
 
    public static function snake2camel($str)
    {
        $str = str_replace('_', ' ', mb_strtolower($str));
        return str_replace(' ', '', ucwords($str));
    }
 
    public static function str_replace($search, $replace, $str)
    {
        if (is_array($str))
        {
            foreach ($str as $key => $value)
            {
                if (is_scalar($value))
                {
                    $str[$key] = str_replace($search, $replace, $value);
                }
            }
        }
        elseif (is_scalar($str))
        {
            $str = str_replace($search, $replace, $str);
        }
 
        return $str;
    }
 
    public static function isStringable($value): bool
    {
        return !is_array($value)
            && (
                (!is_object($value) && settype($value, 'string') !== false)
                || (is_object($value) && method_exists($value, '__toString'))
            );
    }
}