<?php

$file = file_get_contents( dirname(__FILE__)."/backtrace.txt" );
$file = explode("\n",$file);

foreach( $file as $key => $value )
{
	if( strpos($value,"120.146.82.138") === false )
	{
		unset( $file[$key] );
	}
}

$file = implode("\n",$file);

file_put_contents( dirname(__FILE__)."/backtrace_.txt", $file);