String length and counting in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the length of the string.

PHP

<?php
$string = "hello";
$length = [1]($string);
echo $length;
?>

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

Astrlen

Bcount

Csize

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using count() which works for arrays, not strings.

Trying to use length or size which are not PHP functions.

The strlen function returns the length of a string in PHP.

2fill in blank

medium

Complete the code to count how many times 'a' appears in the string.

PHP

<?php
$string = "banana";
$count = substr_count($string, [1]);
echo $count;
?>

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

A"b"

B"an"

C"n"

D"a"

Attempts:

3 left

💡 Hint

Common Mistakes

Counting the wrong character.

Not using quotes around the character.

The substr_count function counts how many times a substring appears in a string. Here, we count 'a'.

3fill in blank

hard

Fix the error in the code to correctly get the string length.

PHP

<?php
$text = "apple";
$len = [1]($text);
echo $len;
?>

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

Acount

Bstrlen

Clength

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using count() which causes wrong output.

Using non-existent functions like length or size.

Use strlen to get the length of a string in PHP. count is for arrays.

4fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 3 characters.

PHP

<?php
$words = ["cat", "house", "dog", "elephant"];
$lengths = [];
foreach ($words as $word) {
    if ([1]($word) [2] 3) {
        $lengths[$word] = strlen($word);
    }
}
print_r($lengths);
?>

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

Astrlen

Bcount

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using count() instead of strlen() for strings.

Using wrong comparison operators.

Use strlen to get the length of each word and check if it is greater than 3.

5fill in blank

hard

Fill all three blanks to create an associative array with uppercase keys and their original values for words longer than 4 characters.

PHP

<?php
$words = ["apple", "bat", "carrot", "dog"];
$result = [];
foreach ($words as $word) {
    if (strlen($word) [1] 4) {
        $result[[2]] = [3];
    }
}
print_r($result);
?>

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

A>

B$word

Cstrtoupper($word)

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators.

Mixing up keys and values in the array.

Check if the word length is greater than 4, then use the uppercase word as the key and the original word as the value.