php - Why do I get error on "Array to String Conversion"? - Stack Overflow
PHP String Exercise: Remove a part of a string from the beginning - w3resource
PHP: substr - Manual
PHP: substr - Manual
How to get last character of a string in PHP? - PHPGurukul
Extract a specific portion of string by position in PHP – BrainBell
Converting String to Array in PHP Using Different Methods
PHP String Exercise: Get the last three characters of a string - w3resource
How to Generate PHP Random String Token (8 Ways) - Phppot
PHP strpos() Function: locating a substring within a string
PHP Substring Examples - Dot Net Perls
Extract substring from the string in PHP using substr()
PHP Get Character at Index from String Example
PHP substr() function - w3resource
PHP String Exercise: Get the characters after the last '/' in an url - w3resource
How to get Key from this string array in PHP - Stack Overflow
Get Part of a String from a Long String in PHP - FiveStarCoding
How to Get substring from a string in PHP
Get all possible substring in php - Stack Overflow
How to get variable value from URL query string in PHP? « Online Class Notes
Reading a File into a String or Array in PHP – BrainBell
Reduce boilerplate code with PHP 8 - Carsten Windler
How to use PHP strlen to get the string length with 5 examples
