PHP: Expects parameter to be string array given - Stack Overflow
PHP Data Types
explode - Why do dollar symbols not appear in a double-quoted PHP string? - Stack Overflow
GitHub - bayfrontmedia/php-string-helpers: PHP helper class to provide useful string functions.
PHPyths Buster: A great string performance test! (updated) - Krzych Jończyk
PHP String Exercise: Print the next character of a specific character - w3resource
regex - URL string compare not working in php - Stack Overflow
7 PHP String Functions You Should Know and How To Use Them - Digital Owl's Prose
How to Reverse String in PHP | Custom Function - YouTube
7 PHP String Functions You Should Know and How To Use Them | by Joshua Otwell | Level Up Coding
PHP Exercises: Remove the character in a given position of a given string - w3resource
PHP Regular Expression Exercise: Remove all characters from a string except a-z A-Z 0-9 or blank - w3resource
How to change the string case? in PHP – BrainBell
PHP Strings - java4coding
PHP – empty() Explained – Tech Geek Galaxy
Beginner guide of PHP Strings - DevOpsSchool.com
Why does PHP consider 0 to be equal to a string? - Stack Overflow
trim() in PHP | Tree Types of trim() in PHP You Need To Know
Reverse a String in PHP without using strrev() Method
PHP String to Array Conversion । PHP Explode Function - YouTube
Generating a Timestamp in PHP – BrainBell
