Why file operations matter in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file for reading.

PHP

<?php
$file = fopen('example.txt', '[1]');
?>

Drag options to blanks, or click blank then click option'

Aw

Br

Ca

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' which opens the file for writing and erases content.

The mode 'r' opens the file for reading only.

2fill in blank

medium

Complete the code to write 'Hello' to a file.

PHP

<?php
$file = fopen('greeting.txt', 'w');
fwrite([1], 'Hello');
fclose($file);
?>

Drag options to blanks, or click blank then click option'

A$file

B$handle

C$open

D$f

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable not defined or different from the fopen result.

The variable $file holds the file resource returned by fopen, which is used by fwrite.

3fill in blank

hard

Fix the error in the code to read a file line by line.

PHP

<?php
$file = fopen('data.txt', 'r');
while (($line = fgets([1])) !== false) {
    echo $line;
}
fclose($file);
?>

Drag options to blanks, or click blank then click option'

A$f

B$handle

C$file

D$stream

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable not assigned or undefined in the code.

The variable $file is the file pointer used with fgets to read lines.

4fill in blank

hard

Fill both blanks to check if a file exists and then delete it.

PHP

<?php
if ([1]('temp.txt')) {
    [2]('temp.txt');
}
?>

Drag options to blanks, or click blank then click option'

Afile_exists

Bunlink

Cfopen

Dreadfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using fopen instead of file_exists for checking file presence.

Use file_exists to check if the file is there, and unlink to delete it.

5fill in blank

hard

Fill all three blanks to open a file, write text, and close it properly.

PHP

<?php
[1] = fopen('log.txt', '[2]');
fwrite([3], "Log entry\n");
fclose($file);
?>

Drag options to blanks, or click blank then click option'

A$file

Ba

Dw

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' mode erases file content instead of appending.

Assign fopen to $file, open in append mode 'a', and write using $file.