Detect if character is upper or lowercase

[jackli]

Is there a PHP function that detects if a specific character in string is lower/upper case? If not, what's the best way to do this?

[priti]

Is there a PHP function that detects if a specific character in string is lower/upper case? If not, what's the best way to do this?

Till now i have not seen any inbuilt PHP function like issupper or islower() but i think you can do it as below.If you have to check the string of characters.

function isupper($i)
{
return (strtoupper($i) === $i);
}

[mmarif4u]

If u r using login script or some thing like that.
Than in ur query just specify the field as BINARY.
It will do the trick.

[Raju Gautam]

Alternative to priti's code you can also find like this too:

$string = "helLo";
for($i=0;$i<strlen($string);$i++){
    if(ord($string[$i]) >= 65 && ord($string[$i]) <= 90){
        echo $string[$i] . "= Upper case <br>";
    }
    else{
        echo $string[$i] . "= Lower case <br>";
    }
} 

Apply in your case.

[stereofrog]

ctype_lower
ctype_upper

[Raju Gautam]

ctype_lower
ctype_upper

Never try to look for such functions. Thanks stereofrog !!

Lol!