php写文件（高并发访问）

[php]代码库

function write ( $data )
{
	$return = false;
	if ( $handle = @fopen ( 'error.txt','a+' ) )
	{
		$i=0;
		while ( !flock ( $handle,2 ) && $i++ < 3 )
		{
			usleep ( 500000 );
		}

		if ( $i < 3 && fwrite ( $handle,$data . "\r\n" ) )
		{
			flock ( $handle,3 );
			$return  = true;
		}

		fclose ( $handle );
	}
	return $return;
}