<?php
class Test{
  //日志路徑
  const LOG_PATH="E:\phpServer\Apache\logs\error.log";
  const NGINX_LOG_PATH="E:\phpServer\\nginx\logs\error.log";
  //顯示的行數(shù)
  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:")){
        $line="<font color='red'>".$line."</font>";
      }
      $html.="<div class='line'>".$line."<div>";
    }
    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")){
        $line="<font color='red'>".$line."</font>";
      }
      $html.="<div class='line'>".$line."<div>";
    }
    echo $html;
  }
  /**
  * 讀取日志
  */
  private function readLogs($filePath,$num=20){
    $fp = fopen($filePath,"r");
    $pos = -2; 
    $eof = ""; 
    $head = false;  //當(dāng)總行數(shù)小于Num時(shí)，判斷是否到第一行了 
    $lines = array(); 
    while($num>0){ 
      while($eof != "\n"){ 
        if(fseek($fp, $pos, SEEK_END)==0){  //fseek成功返回0，失敗返回-1 
          $eof = fgetc($fp); 
          $pos--; 
        }else{                //當(dāng)?shù)竭_(dá)第一行，行首時(shí)，設(shè)置$pos失敗 
          fseek($fp,0,SEEK_SET); 
          $head = true;          //到達(dá)文件頭部，開(kāi)關(guān)打開(kāi) 
          break; 
        } 
         
      } 
      array_unshift($lines,fgets($fp)); 
      if($head){ break; }         //這一句，只能放上一句后，因?yàn)榈轿募^后，把第一行讀取出來(lái)再跳出整個(gè)循環(huán) 
      $eof = ""; 
      $num--; 
    } 
    fclose($fp); 
    return array_reverse($lines); 
  }
}
Test::main();
?>
<style type="text/css">
*{
  padding: 0;
  margin: 0;
}
.logsBox{
  margin:5px;
  padding: 5px;
  width: 600px;
  background: #000;
  color:#fff;
  font-size: 13px;
  float: left;
}
.logsBox .line{
  margin: 12px 0;
}
</style>
<div class="logsBox apache">
  <div class="line">日志讀取...</div>
</div>
<div class="logsBox nginx">
  <div class="line">日志讀取...</div>
</div>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
  $(function(){

    function showLogs(api,showClass){
      function readLogs(){
        $.ajax({
          url:api,
          type:"get",
          dataType:"text",
          success:function(data){
            $(showClass).html(data);
          }
        });
      }
      readLogs();
      setInterval(readLogs,5000);
    }
    showLogs("?action=showNginxLogs",".nginx");
    showLogs("?action=showApacheLogs",".apache");
  });
</script>