How to convert string to uppercase in php

php method to convert a string to uppercase: You can use the built-in function strtoupper() to convert. The strtoupper() function converts the specified string to uppercase and returns the string converted to uppercase.

Use function:

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

Grammar:

strtoupper(string)

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Code implementation:

<?php
$string = "Learn PHP string functions at phpcn";
$lower = strtolower($string);
$upper = strtoupper($string);
print("$lower\n");
print("$upper\n");
print("\n");
?>

Output results:

learn php string functions at phpcn
LEARN PHP STRING FUNCTIONS AT PHPCN

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