PHP Judgment case Letter Function _php Tutorial

Provides a simple example of PHP to determine the case letter function Oh, it can find out how many uppercase letters a string has how many lowercase letter oh, is a very convenient common function.

Provides a simple example of PHP tutorial to determine the case letter function Oh, it can find out how many uppercase letters a string has how many lowercase letter oh, is a very convenient common function.

function Checkcase ($str) {
if (Preg_match ('/^[a-z]+$/', $str)) {
echo ' Small Letter ';
}elseif (Preg_match ('/^[a-z]+$/', $str)) {
echo ' capital letters ';
}
}

Method Two

$str = ' a ';
function Checkcase1 ($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);
?>

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