GitHub - bayfrontmedia/php-string-helpers: PHP helper class to provide useful string functions.
PHP Exercises: Count the number of strings with given length in given array of strings - w3resource
PHP Data Types
trim() in PHP | Tree Types of trim() in PHP You Need To Know
7 PHP String Functions You Should Know and How To Use Them - Digital Owl's Prose
PHP - Wikipedia
PHP Strings - AlphaCodingSkills
PHP Program to count the vowels, digits, and spaces in a string | T4Tutorials.com
Type Casting in PHP | CodeAhoy
regex - URL string compare not working in php - Stack Overflow
PHP Strings - java4coding
7 PHP String Functions You Should Know and How To Use Them | by Joshua Otwell | Level Up Coding
How to reverse string in PHP without using function? : r/codinginterview
Php - check if string is not empty or has a first character not equal to - Stack Overflow
0' as a string with empty() in PHP - Stack Overflow
PHP explode(): Split a String by a Separator into an Array of Strings
explode - Why do dollar symbols not appear in a double-quoted PHP string? - Stack Overflow
PHPyths Buster: A great string performance test! (updated) - Krzych Jończyk
PHP String to Array Conversion । PHP Explode Function - YouTube
How to change the string case? in PHP – BrainBell
