PHP functions - Exercises, Practice, Solution
PHP functions [ 6 exercises with solution]
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1. Write a function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.
2. Write a function to check whether a number is prime or not.
Note: A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.
3. Write a function to reverse a string.
4. Write a function to sort an array.
5. Write a PHP function that checks whether a string is all lowercase.
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6. Write a PHP function that checks whether a passed string is a palindrome or not?
A palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.
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PHP: Tips of the Day
PHP - how to create a newline character?
Only double quoted strings interpret the escape sequences \r and \n as '0x0D' and '0x0A' respectively, so you want:
Single quoted strings, on the other hand, only know the escape sequences \\ and \'.
So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string "\r\n" or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break within a single quoted string is to literally type it with your editor:
$s = 'some text before the line break some text after';
Make sure to check your editor for its line break settings if you require some specific character sequence (\r\n for example).
Ref : https://bit.ly/3hcyege
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