PHP to determine the uppercase and lowercase letters function

Provides a simple example of PHP to determine the case letter function, it can find out how many uppercase letters in a string has how many lowercase letter, is a very convenient common function, the code is as follows:

function Checkcase ($STR) {

if (Preg_match ('/^[a-z]+$/', $str)) {

echo ' Small Letter ';

}elseif (Preg_match ('/^[a-z]+$/', $str)) {

echo ' capital letters ';

}

}

Method Two, the code is as follows:

<?php

$str = ' a ';

function Checkcase1 ($STR) {

$str = Ord ($STR);

if ($str >64&& $str <91) {

echo ' capital letters ';

Return

}

if ($str >96&& $str <123) {

echo ' Small Letter ';

Return

}

Echo ' is not a letter ';

}

function Checkcase2 ($STR) {

if (Strtoupper ($str) = = = $str) {

echo ' capital letters ';

}else{

echo ' Small Letter ';

}

}

echo checkcase1 ($STR);

echo Checkcase2 ($STR);

Open source software: phpfensi.com

?>

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