[PHP] 读取大文件并显示

php
class Test{
    //日志路径
    const LOG_PATH="E:\phpServer\Apache\logs\error.log";
    const NGINX_LOG_PATH="E:\phpServer\\nginx\logs\error.log";
    //显示的行数
    const PAGES=50;
    public static function main(){
        header("content-type:text/html;charset=utf-8");
        
        if(!empty($_GET['action'])){
            self::$_GET['action']();
            exit;
        }
    }

    public static function showApacheLogs(){
        $test=new Test();
        $result=$test->readLogs(self::LOG_PATH,self::PAGES);
        $html="";
        foreach($result as $line){
            if(strpos($line,"error:")){
                $line="".$line."";
            }
            $html.="
".$line."
";
        }
        echo $html;
    }
    public static function showNginxLogs(){
        $test=new Test();
        $result=$test->readLogs(self::NGINX_LOG_PATH,self::PAGES);
        $html="";
        foreach($result as $line){
            if(strpos($line,"error")){
                $line="".$line."";
            }
            $html.="
".$line."
";
        }
        echo $html;
    }
    /**
    * 读取日志
    */
    private function readLogs($filePath,$num=20){
        $fp = fopen($filePath,"r");
        $pos = -2;  
        $eof = "";  
        $head = false;   //当总行数小于Num时，判断是否到第一行了  
        $lines = array();  
        while($num>0){  
            while($eof != "\n"){  
                if(fseek($fp, $pos, SEEK_END)==0){    //fseek成功返回0，失败返回-1  
                    $eof = fgetc($fp);  
                    $pos--;  
                }else{                               //当到达第一行，行首时，设置$pos失败  
                    fseek($fp,0,SEEK_SET);  
                    $head = true;                   //到达文件头部，开关打开  
                    break;  
                }  
                  
            }  
            array_unshift($lines,fgets($fp));  
            if($head){ break; }                 //这一句，只能放上一句后，因为到文件头后，把第一行读取出来再跳出整个循环  
            $eof = "";  
            $num--;  
        }  
        fclose($fp);  
        return array_reverse($lines);  
    }
}
Test::main();
?>

class="logsBox apache">
    
class="line">日志读取...

class="logsBox nginx">
    
class="line">日志读取...