String split and explode in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the explode() function do in PHP?

The explode() function splits a string into an array using a specified delimiter.

beginner

How do you split a string by spaces using explode()?

Use explode(' ', $string) to split the string at each space character.

intermediate

What is the difference between explode() and str_split()?

explode() splits a string by a delimiter into an array of substrings. <br>str_split() splits a string into an array of single characters or fixed-length chunks.

beginner

What will explode(',', 'apple,banana,orange') return?

It returns an array: ['apple', 'banana', 'orange'] splitting the string at each comma.

intermediate

Can explode() handle an empty delimiter?

No, explode() requires a non-empty string as the delimiter. Passing an empty string will cause a warning.

Which function splits a string into an array by a delimiter in PHP?

A substr()

B implode()

C str_replace()

D explode()

explode() splits strings by a delimiter. implode() joins array elements into a string.

What does explode('-', '2024-06-15') return?

A ['2024', '06', '15']

B '2024-06-15'

C ['2024-06-15']

D ['2024', '-06', '-15']

The string is split at each dash, producing an array of three parts.

What happens if the delimiter is not found in the string when using explode()?

A Throws an error

B Returns an empty array

C Returns an array with the original string as the only element

D Returns null

If delimiter is missing, explode() returns an array containing the whole string.

Which function splits a string into single characters or fixed-length chunks?

A str_split()

B explode()

C substr()

D implode()

str_split() splits strings into characters or chunks, unlike explode() which uses delimiters.

What is the correct way to split a CSV string into an array?

A explode(' ', $csvString)

B explode(',', $csvString)

C str_split($csvString)

D implode(',', $csvString)

CSV values are separated by commas, so use explode(',', $csvString).

Explain how the explode() function works and give an example.

Think about how you cut a sentence into words using spaces.

Describe the difference between explode() and str_split() in PHP.

One splits by a character or string, the other by length.