movie_detail.php

<?php
    function curl($url)
    {
        $ua = 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36';
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_USERAGENT, $ua);
        curl_setopt($curl, CURLOPT_FAILONERROR, true);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        $content = curl_exec($curl);
        curl_close($curl);

        if (empty($content)) {
            throw new Exception("Can't get content, url: " . $url);
        }

        return $content;
    }

    function getDetailSummarize($content)
    {
        $find = '<div class="detail_summarize">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find detail_summarize start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '<script', $start);
        if ($end === false) {
            throw new Exception("Can't find detail_summarize end point.");
        }

        return substr($content, $start, $end - $start);
    }

    function getTitleYear($content)
    {
        $find = '<strong class="tit_movie">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find title start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</strong>', $start);
        if ($end === false) {
            throw new Exception("Can't find title end point.");
        }

        $title_year = trim(substr($content, $start, $end - $start));

        if (preg_match('/(.*?) \((\d{4})\)/', $title_year, $matches) == 0) {
            throw new Exception("Can't find regex point.");
        }

        $title = $matches[1];
        $year = (int)$matches[2];

        return [$title, $year];
    }

    function getOriginalTitle($content)
    {
        $find = '<span class="txt_origin">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find original_title start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</span>', $start);
        if ($end === false) {
            throw new Exception("Can't find original_title end point.");
        }

        return trim(substr($content, $start, $end - $start));
    }

    function getRating($content)
    {
        $find = '<em class="emph_grade">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find rating start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</em>', $start);
        if ($end === false) {
            throw new Exception("Can't find rating end point.");
        }

        return (float)substr($content, $start, $end - $start);
    }

    function getTagline($content)
    {
        $find = '<strong class="tit_copy">';
        $start = strpos($content, $find);
        if ($start === false) {
            // throw new Exception("Can't find tagline start point.");
            return '';
        }

        $start += strlen($find);
        $end = strpos($content, '</strong', $start);
        if ($end === false) {
            // throw new Exception("Can't find tagline end point.");
            return '';
        }

        return trim(str_replace(["\r", "\n", "  "], " ", strip_tags(substr($content, $start, $end - $start))));
    }

    function getListMovie($content)
    {
        $find = '<dl class="list_movie list_main">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find list_movie start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</dl>', $start);
        if ($end === false) {
            throw new Exception("Can't find list_movie end point.");
        }

        return substr($content, $start, $end - $start);
    }

    function getGenresContries($content)
    {
        $find = '<dd class="txt_main">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find genres start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</dd>', $start);
        if ($end === false) {
            throw new Exception("Can't find genres end point.");
        }

        $genres = explode('/', str_replace(' ', '', substr($content, $start, $end - $start)));

        $find = '<dd>';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find countries start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</dd>', $start);
        if ($end === false) {
            throw new Exception("Can't find countries end point.");
        }

        $countries = explode(',', str_replace(["\n", "\t", ' '], '', substr($content, $start, $end - $start)));

        return [$genres, $countries];
    }

    function getOriginallyAvailableAt($content)
    {
        if (preg_match('/(\d{4}\.\d{2}\.\d{2})\s*개봉/u', $content, $matches) == 0) {
            return null;
        }

        return $matches[1];
    }

    function getDurationContentRating($content)
    {
        if (preg_match('/(\d+)분,(.*)<\/dd>/u', $content, $matches) == 0) {
            $duration = 0;
            $contentRating = null;
        } else {
            $duration = (int)$matches[1];
            $contentRating = trim($matches[2]);
        }

        return [$duration, $contentRating];
    }

    function getSummary($content)
    {
        $find = '<div class="desc_movie">';
        $start = strpos($content, $find);
        if ($start === false) {
            throw new Exception("Can't find summary start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '</div', $start);
        if ($end === false) {
            throw new Exception("Can't find summary end point.");
        }

        return trim(str_replace(["\r\n", "\r", "\n\n"], "\n", strip_tags(substr($content, $start, $end - $start))));
    }

    function getPosterUrl($content)
    {
        $find = '<img src="';
        $start = strpos($content, $find, $prepos);
        if ($start === false) {
            throw new Exception("Can't find poster start point.");
        }

        $start += strlen($find);
        $end = strpos($content, '"', $start);
        if ($end === false) {
            throw new Exception("Can't find poster end point.");
        }

        return substr($content, $start, $end - $start);
    }

    function getJson($content)
    {
        $detailSummarize = getDetailSummarize($content);
        list($title, $year) = getTitleYear($detailSummarize);
        $originalTitle = getOriginalTitle($detailSummarize);
        $rating = getRating($detailSummarize);
        $tagline = getTagline($detailSummarize);
        $summary = getSummary($detailSummarize);
        $posterUrl = getPosterUrl($detailSummarize);
        $listMovie = getListMovie($detailSummarize);
        list($genres, $countries) = getGenresContries($listMovie);
        $originallyAvailableAt = getOriginallyAvailableAt($listMovie);
        list($duration, $contentRating) = getDurationContentRating($listMovie);

        $result = [
            'title' => $title,
            'year' => $year,
            'original_title' => $originalTitle,
            'rating' => $rating,
            'tagline' => $tagline,
            'genres' => $genres,
            'countries' => $countries,
            'originally_available_at' => $originallyAvailableAt,
            'duration' => $duration,
            'content_rating' => $contentRating,
            'summary' => $summary,
            'poster_url' => $posterUrl,
        ];

        return $result;
    }

    function main($movieId)
    {
        try {
            $content = curl('https://movie.daum.net/moviedb/main?movieId=' . $movieId);
            $json = [
                'data' => getJson($content),
            ];
        } catch (Exception $e) {
            $json = [
                'error' => (string)$e,
            ];
        }

        header('Content-Type: application/json');
        $result = json_encode($json, JSON_UNESCAPED_UNICODE);
        echo $result;
    }

    main(array_key_exists('id', $_GET) ? (int)$_GET['id'] : 0);