Number of Lines PHP

Number of Lines in Text

If you have some text with line breaks, the number of lines can be calculated as follows:

<?php
	$str = '123\n456\n789';
	echo substr_count($test, '\n') + 1;
?>

The point is that a line break is an invisible character \n. Using the function substr_count we count the number of these characters in our text, but it turns out to be 1 less than the actual lines. Therefore, we add one.

Number of Lines in a File

To count the number of lines in a file, you can use the method described above, or you can do it like this:

<?php
	// Consider the file as an array:
	$arr = file($file);
	
	// Count the number of lines in the array:
	echo count($arr);
?>

Please note that the first method is more optimal and works faster.