PHP store filename to variable and count number of lines in file

Hello, today’s article is very suitable for novices to practice! As we can see from the title, there are two small requirements that we need to use PHP to implement. The first requires us to store a text file name into a variable, and the second requires us to calculate the text it holds. The number of lines, I wonder if anyone has any ideas for implementation? Below we will give you a detailed introduction!

If you have read some of the articles I have written before, you all know that I will use a question form to introduce the topic of the article, so it will be the same today!

Assume the question is "How to write a PHP script to count the number of lines in a file. Note that you need to store a text file name into a variable and count the number of text lines it has."

Then let’s write a solution to this problem:

First we create a PHP sample file, which I named here demo.php;

Then enter the code directly as follows:

<?php

$file = basename($_SERVER[&#39;PHP_SELF&#39;]);
$no_of_lines = count(file($file));
echo " $file 中有 $no_of_lines 行"."<br>";

Then execute the file, the result is as follows:

Whether the file has 5 lines, we can see the following

Nothing wrong!

Storing a text file name into a variable is achieved through the "basename($_SERVER['PHP_SELF']);" method;

Calculate what it has The number of text lines is achieved through the "count(file($file));" method.

The basename() function is used to return the file name part of the path;

$_SERVER['PHP_SELF'] represents the current php file The location address relative to the website root directory, related to the document root;

file() function reads the entire file into an array. Similar to file_get_contents(), except that file() returns the file as an array. Each unit in the array is a corresponding line in the file, including newlines; the

count() function is used to return the number of elements in the array.

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