PHP Regular Expression Exercise: Remove all characters from a string except a-z A-Z 0-9 or blank - w3resource
PHP Remove garbage from string - Stack Overflow
Strip some basic HTML tags from String – Cloud Web Labs
How to Trim Strings in PHP - YouTube
Understanding Trim in PHP For Complex Programming
PHP trim() function - Trim beginning and end of string (left and right trim) in PHP - YouTube
How to remove the first character of string in PHP? - YouTube
html - Strip everything besides image src URL in string PHP - Stack Overflow
PHP trim() function - Scaler Topics
Php String Handling Handbook: Matt Wade, Paul Adams, Chris Cornutt, Syed Fahad Gilani, Vikram Vaswani: 9781861008350: Amazon.com: Books
How to remove HTML special characters from a string in PHP? - Studytonight
PHP strip_tags() function - w3resource
Top 15 Most Common PHP String Functions - Troposal
GitHub - manuwhat/strip-tags: strips php and html tags or attributes from string
How To Remove Whitespace Characters in a string in PHP - trim() Function - Tech Fry
PHP Str_Replace() Function - How To Replace Characters In A String In PHP
PHP ltrim() function - Trim beginning of string (left trim) in PHP - YouTube
7 PHP String Functions You Should Know and How To Use Them - Digital Owl's Prose
PHP 7.3: Detect use of the string.strip_tags stream filter · Issue #765 · PHPCompatibility/PHPCompatibility · GitHub
How to Strip all Spaces out of a String in PHP
Strip some basic HTML tags from String – Cloud Web Labs
Trimming String using PHP - Phppot
