php怎么实现小说阅读功能

<?php
header("content-type:text/html;charset=utf-8");

$artName = $_GET["artname"];

if(!$artName){
    echo "文件名没有哦";exit();
}

$fromFileName = "../".$artName.".txt";
if(!file_exists($fromFileName)){
    echo "源文件不存在啊";exit();
}

$distDirName = $artName;

$myfile = fopen($fromFileName, "r") or die("Unable to open file!");
$content = fread($myfile,filesize($fromFileName));
fclose($myfile);
echo "<br>读取原始文件成功..............";

$pattern='/#titlestart#(.*?)#titleend#/is';
preg_match_all ($pattern, $content, $result, PREG_PATTERN_ORDER);

echo "<br><br>文章目录识别成功..............<br><br>";

// 获取到目录
// 目录数组 $result[1]
$catalogStr = "";
$catalogArr = array();
foreach($result[1] as $v){
    array_push($catalogArr,$v);
    $catalogStr .= $v."#catalog#";
}

// 创建书本目录
$dir = iconv("UTF-8", "GBK", "./books/".$distDirName);
if (!file_exists($dir)){
    mkdir ($dir,0777,true);
    echo '<br>创建文件夹bookdir成功<br><br>';
} else {
    echo '<br>需创建的文件夹bookdir已经存在<br><br>';
}

// 生成目录文件
$myfile = fopen($dir."/catalog.txt", "w") or die("Unable to open file!");
fwrite($myfile, $catalogStr);
fclose($myfile);
echo "<br>==============================目录文件生成成功..............<br>";

// 获取到内容，写入文件
foreach($catalogArr as $k=>$v){
    $pattern='/#titlestart#'.$v.'#titleend#(.*?)#titlestart/is';
    preg_match ($pattern, $content, $result);

    $myfile = fopen($dir."/".($k+1).".txt", "w") or die("Unable to open file!");
    fwrite($myfile, $result[1]);
    fclose($myfile);
    echo "<br>===================文章第".($k+1)."章节写入成功..............";
}


echo "<br><br><br><br><br><br><br>====================书本识别成功...........................";



?>

<?php
header('Content-Type:application/json');

$action = $_GET["act"];
$fileName = $_GET["artname"];

if(!$action){
    $rsp = array("code" => 500, "msg" => "请求不存在");
    $rsp = json_encode($rsp);
    echo $rsp;
    exit();
}else if(!$fileName){
    $rsp = array("code" => 500, "msg" => "书本不存在");
    $rsp = json_encode($rsp);
    echo $rsp;
    exit();
}

if($action == "getcat"){
    // 获取目录
    $fileName = "../books/".$fileName."/catalog.txt";

    // 读取文件
    if(file_exists($fileName)){
        $myfile = fopen($fileName, "r") or die("Unable to open file!");
        $content = fread($myfile,filesize($fileName));
        fclose($myfile);

        $code = 200;
        $msg = "读取目录成功";
        $catalogArray = array();
        if($content){
            $carray = explode('#catalog#',$content);

            foreach($carray as $k=>$v){
                if($v){
                    $item = array("index"=>($k+1), "cataTitle"=>$v);
                    array_push($catalogArray, $item);
                }
            }
        }

        if(count($catalogArray)<=0){
            $code = 500;
            $msg = "书本不存在目录";
        }

        $rsp = array("code" => $code, "msg" => $msg, "catalogList" => $catalogArray);
        $rsp = json_encode($rsp);

        echo $rsp;
        exit();
    }else{
        // 文件不存在
        $rsp = array("code" => 404, "msg" => "文件不存在");
        $rsp = json_encode($rsp);
        echo $rsp;
        exit();
    }
}else if($action=="getcon"){
    // 获取文章内容
    $index = (int)$_GET["index"];

    $fileName = "../books/".$fileName."/".$index.".txt";

    if(file_exists($fileName)){
        $myfile = fopen($fileName, "r") or die("Unable to open file!");
        $content = fread($myfile,filesize($fileName));
        fclose($myfile);

        $content = str_replace("\r\n","<br>", $content);
        $rsp = array("code" => 200, "msg" => "读取内容成功", "con" => $content);
        $rsp = json_encode($rsp);

        echo $rsp;
        exit();
    }else{
        // 文件不存在
        $rsp = array("code" => 404, "msg" => "文件不存在");
        $rsp = json_encode($rsp);
        echo $rsp;
        exit();
    }
}else{
    echo "error request, please check your request content";
    exit();
}


?>