Strings

Question 1

How can you remove all whitespace from a string?

Answer 1

trim($str);

Question 2

How can you repeat a string?

Answer 2

str_repeat($str, 5)

Question 3

How to find the first occurrence of a specified letter in a string and how do you find the last occurrence of a specified letter?

Answer 3

strpos($str, ‘b’);

strrchr($str, ‘b’)

Question 4

How can you turn a string in to an array with each word as an item? How can you turn an array into a string with a space between each item in array?

Answer 4

explode(‘ ‘, $str);

implode(‘ ‘, $str);