converter.php

См. документацию.

<?php
 
namespace Bitrix\Main\Engine\Response;
 
use Bitrix\Main\Text\StringHelper;
 
final class Converter
{
    const TO_SNAKE          = 0x00001;
    const TO_CAMEL          = 0x00002;
    const TO_SNAKE_DIGIT      = 0x00004;
    const TO_UPPER          = 0x00010;
    const TO_LOWER          = 0x00020;
    const LC_FIRST          = 0x00100;
    const UC_FIRST          = 0x00200;
    const KEYS              = 0x01000;
    const VALUES          = 0x02000;
    const RECURSIVE        = 0x04000;
 
    const OUTPUT_JSON_FORMAT = self::KEYS | self::RECURSIVE | self::TO_CAMEL | self::LC_FIRST;
 
    private $format;
 
    public function __construct($format)
    {
        $this->setFormat($format);
    }
 
    public static function toJson()
    {
        return new self(self::OUTPUT_JSON_FORMAT);
    }
 
    public function process($data)
    {
        if (!$data)
        {
            return $data;
        }
 
        if (is_string($data))
        {
            return $this->formatString($data);
        }
 
        if (is_array($data))
        {
            return $this->formatArray($data);
        }
 
        return $data;
    }
 
    protected function formatArray(array $array)
    {
        $newData = [];
        foreach ($array as $key => $item)
        {
            $itemConverted = false;
            if ($this->format & self::VALUES)
            {
                if (($this->format & self::RECURSIVE) && is_array($item))
                {
                    $item = $this->process($item);
                }
                elseif (is_string($item))
                {
                    $item = $this->formatString($item);
                }
 
                $itemConverted = true;
            }
 
            if ($this->format & self::KEYS)
            {
                if (!is_int($key))
                {
                    $key = $this->formatString($key);
                }
 
                if (($this->format & self::RECURSIVE) && is_array($item) && !$itemConverted)
                {
                    $item = $this->formatArray($item);
                }
            }
 
            $newData[$key] = $item;
        }
 
        return $newData;
    }
 
    protected function formatString($string)
    {
        if ($this->format & self::TO_SNAKE)
        {
            $string = StringHelper::camel2snake($string);
        }
 
        if ($this->format & self::TO_SNAKE_DIGIT)
        {
            $string = preg_replace('/(\d+)([A-Za-z])/', '$1_$2', $string);
            $string = preg_replace('/([A-Za-z])(\d)/', '$1_$2', $string);
            $string = preg_replace('/([^_])([A-Z])/', '$1_$2', $string);
            $string = mb_strtolower($string);
        }
 
        if ($this->format & self::TO_CAMEL)
        {
            $string = StringHelper::snake2camel($string);
        }
 
        if ($this->format & self::TO_LOWER)
        {
            $string = mb_strtolower($string);
        }
 
        if ($this->format & self::TO_UPPER)
        {
            $string = mb_strtoupper($string);
        }
 
        if ($this->format & self::UC_FIRST)
        {
            $string = ucfirst($string);
        }
 
        if ($this->format & self::LC_FIRST)
        {
            $string = lcfirst($string);
        }
 
 
        return $string;
    }
 
    public function getFormat()
    {
        return $this->format;
    }
 
    public function setFormat($format)
    {
        $this->format = $format;
 
        return $this;
    }
}