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>
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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。