How to get the number of lines in a file in PHP

The example in this article describes how to get the number of lines in a file in PHP. Share it with everyone for your reference. The specific analysis is as follows:
Two implementation methods are provided. Although the second one is simple and easy to understand, the first one is the most efficient
The first one:

php $file_path = 'xxx.txt'; //文件路径  $line = 0 ; //初始化行数 //打开文件 http://www.manongjc.com/article/1330.html $fp = fopen($file_path , 'r') or die("open file failure!"); if($fp){ //获取文件的一行内容，注意：需要php5才支持该函数；  while(stream_get_line($fp,8192,"\n")){ $line++; } fclose($fp);//关闭文件  } //输出行数；  echo $line; ?>

The second type:

php //http://www.manongjc.com/article/1330.html $line = count(file('filename')); echo $line; ?>

The second method will be very inefficient because it needs to save the content of the file