How to convert lowercase letters to uppercase letters in php

How to convert lowercase letters to uppercase letters in php

How to convert lowercase letters to uppercase letters in php, you can use the "strtoupper" function To be done.

strtoupper() function and syntax

strtoupper - Convert the string to uppercase

strtoupper ( string $string ) : string

Convert all alphabetic characters in the string to uppercase and return.

Note that "letter" is related to the current area. For example, in the default "C" locale, the character umlaut-a (ä) is not converted.

strtoupper() example

<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtoupper($str);
echo $str; // 打印 MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
?>

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