使用PHP读取日志文件,当文件比较大的时候,会报内存不足,因此应该部分读取,读取指定的行数的数据
PHP代码:
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<?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 = "<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 ; } /** * 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(); ?> <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" >日志读取...</div> </div> <div class = "logsBox nginx" > <div class = "line" >日志读取...</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> |
以上这篇PHP 读取大文件并显示的简单实例(推荐)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。