How to read the number of lines of a large file in php

Function introduction:

resource fopen($path, $math) Open a file, $path is the path, $math is the method, Returns a resource handle.

string fgets(resource $handle[,int $length])Read a line from the file pointer, $handle is the resource handle, and return a line of text content.

bool feof(resource $handle)Function detects whether the end of the file has been reached.

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ceshi.txt file content

111111111111111
22222222222222
33333333333333
44444444444444
55555555555555
66666666666666

The example code is as follows:

$handle = fopen('./ceshi.txt',"r");//以只读方式打开一个文件
$i = 0;
while(!feof($handle)){//函数检测是否已到达文件末尾 
    if(fgets($handle)){// 从文件指针中读取一行
        $i++;
    };
}
echo $i;//6
fclose($handle);

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