What function is used to convert string case in php?

In PHP, you can use the strtoupper() and strtolower() functions to convert string case. The strtoupper() function converts a string to uppercase and returns the converted string. The strtolower() function can convert a string to lowercase and return the converted result.

php provides us with functions specifically for converting upper and lower case, such as strtoupper() and strtolower().

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Function introduction:

strtoupper() function converts the string to uppercase and Returns a string converted to uppercase.

Example:

<?php
echo strtoupper("Hello WORLD!");
?>

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strtolower() function converts the string to lowercase and returns the conversion to lowercase String.

Example:

<?php
echo strtolower("Hello WORLD.");
?>

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