File existence and info checks in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the file 'example.txt' exists.

PHP

<?php
if ([1]('example.txt')) {
    echo "File exists.";
} else {
    echo "File does not exist.";
}
?>

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

Afopen

Bis_file

Cfile_get_contents

Dfile_exists

Attempts:

3 left

💡 Hint

Common Mistakes

Using fopen without checking if the file exists causes errors.

Using is_file checks if it's a file but not if it exists in all cases.

The file_exists function checks if a file or directory exists at the given path.

2fill in blank

medium

Complete the code to check if 'data.csv' is a regular file.

PHP

<?php
if ([1]('data.csv')) {
    echo "It's a regular file.";
} else {
    echo "It's not a regular file.";
}
?>

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

Ais_file

Bis_dir

Cfile_exists

Dis_readable

Attempts:

3 left

💡 Hint

Common Mistakes

Using is_dir returns true only for directories.

Using file_exists returns true for files and directories.

The is_file function returns true if the path is a regular file.

3fill in blank

hard

Fix the error in the code to get the size of 'report.pdf'.

PHP

<?php
$size = [1]('report.pdf');
echo "File size: $size bytes.";
?>

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Afilesizeof

Bfile_get_contents

Cfilesize

Dfile_exists

Attempts:

3 left

💡 Hint

Common Mistakes

Using file_get_contents returns the file content, not size.

Using filesizeof is not a valid PHP function.

The filesize function returns the size of the file in bytes.

4fill in blank

hard

Fill both blanks to check if 'image.png' is readable and writable.

PHP

<?php
if ([1]('image.png') && [2]('image.png')) {
    echo "File is readable and writable.";
} else {
    echo "File is not accessible for reading and writing.";
}
?>

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

Ais_readable

Bis_file

Cis_writable

Dfile_exists

Attempts:

3 left

💡 Hint

Common Mistakes

Using is_file only checks if it's a file, not permissions.

Using file_exists does not check permissions.

is_readable checks if the file can be read, and is_writable checks if it can be written.

5fill in blank

hard

Fill all three blanks to create an array with file names and their sizes for files larger than 1000 bytes in the 'docs' directory.

PHP

<?php
$files = scandir('docs');
$result = [];
foreach ($files as $file) {
    $path = 'docs/' . $[1];
    if (is_file($path) && filesize($path) [2] 1000) {
        $result[[3]] = filesize($path);
    }
}
print_r($result);
?>

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Afile

B>

C$file

Dfilesize

Attempts:

3 left

💡 Hint

Common Mistakes

Using $files instead of $file in the path.

Using '<' instead of '>' for size comparison.

Using filesize($path) as the key instead of the file name.

We use file to build the path, check if the size is greater than 1000 bytes with >, and use $file as the key in the result array.