String length and counting in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What PHP function is used to find the length of a string?

The strlen() function returns the number of characters in a string.

beginner

How does strlen() count characters in a string?

strlen() counts all characters including spaces, punctuation, and special characters.

beginner

What will strlen('Hello World') return?

It returns 11 because there are 11 characters including the space.

intermediate

How can you count how many times a specific character appears in a string in PHP?

Use the substr_count() function to count occurrences of a substring or character.

beginner

What does substr_count('banana', 'a') return?

It returns 3 because the letter 'a' appears three times in 'banana'.

Which PHP function returns the length of a string?

A str_length()

B count()

C substr_count()

D strlen()

strlen() is the correct function to get string length.

What will strlen('Hi!') return?

A 2

B 3

C 4

D 1

The string 'Hi!' has 3 characters: H, i, and !.

Which function counts how many times a substring appears in a string?

A substr_count()

B str_replace()

C strpos()

D strlen()

substr_count() counts occurrences of a substring.

What does substr_count('apple', 'p') return?

A 1

B 3

C 2

D 0

The letter 'p' appears twice in 'apple'.

Does strlen() count spaces in a string?

A Yes

B No

C Only if spaces are at the start

D Only if spaces are at the end

strlen() counts all characters including spaces.

Explain how to find the length of a string in PHP and what characters are counted.

Think about the function that returns the number of characters.

Describe how to count how many times a specific letter appears in a string using PHP.

There is a function that counts substrings inside strings.