[PHP] 대문자 변환 - strtoupper() 와 소문자 변환 - strtolower()

대문자 변환

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strtoupper ( string $string ) : string

<?php
$alpha = "abcdefghijklmnopqrstuvwsyz";

echo strtoupper($alpha);    // ABCDEFGHIJKLMNOPQRSTUVWSYZ
?>

 

소문자 변환

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strtolower ( string $string ) : string

<?php
$alpha = "ABCDEFGHIJKLMNOPQRSTUVWSYZ";

echo strtolower($alpha);    // abcdefghijklmnopqrstuvwsyz
?>