One of the nice things about working with strings in PHP is its huge range of built-in string-handling functions. If you want to do something to a string, chances are there’s a PHP function to do it for you!
In this article you’ll look at PHP’s string functions for converting text between uppercase and lowercase:
strtolower()
for converting a string to lowercasestrtoupper()
for converting a string to uppercaselcfirst()
for converting the first letter to lowercaseucfirst()
for converting the first letter to uppercaseucwords()
for converting each word to uppercase
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