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PHP Exercises : Count number of lines in a file

PHP : Exercise-16 with Solution

Write a PHP script to count number of lines in a file.

Note : Store a text file name into a variable and count the number of lines of text it has.

Sample Solution: -

PHP Code:

<?php
$file = basename($_SERVER['PHP_SELF']); 
$no_of_lines = count(file($file)); 
echo "There are $no_of_lines lines in $file"."\n";
?>

Sample Output: 

There are 5 lines in a6924e70-5a4c-11e7-b47b-99347412a245.php

Flowchart:

Flowchart: Count number of lines in a file

basename() function: The basename(path,suffix) function is used to get the filename from a path.

count() function: The count() function is used to count the elements of an array or the properties of an object.

Note: For objects, if you have SPL installed, you can hook into count() by implementing interface Countable. The interface has exactly one method, Countable::count(), which returns the return value for the count() function.

PHP Code Editor:

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Previous: Write a PHP script to get last modified information of a file.
Next: Write a PHP script to print current PHP version.

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PHP: Tips of the Day

Mutates the original array to filter out the values specified

Example:

<?php
function tips_pull(&$items, ...$params)
{
  $items = array_values(array_diff($items, $params));
  return $items;
}

$items = ['x', 'y', 'z', 'x', 'y', 'z'];
print_r(tips_pull($items, 'y', 'z'));
?>

Output:

Array
(
    [0] => x
    [1] => x
)