I need PHP help.

function hex2bin($str) {
$bin = "";
$i = 0;
do {
$bin .= chr(hexdec($str{$i}.$str{($i + 1)}));
$i += 2;
} while ($i < strlen($str));
return $bin;
}

Xampp is telling me theres something wrong on the last line (174) which would be the }, but there isn't a problem with it at all
bobo

PHP: hex2bin - Manual

You don't index into arrays with curly braces "{}" to index arrays in PHP, you use square ones [].

i.e:

Code:

---

$bin .= chr(hexdec($str{$i}.$str{($i + 1)}));

---

Should actually be

Code:

---

$bin .= chr(hexdec($str[$i].$str[$i + 1]));

---

However this code isn't going to do what the function name implies (convert a hexadecimal string into a binary string).

I know, It's not my original code, i'm setting up a server, actually and it was one of the errors it was recieving.

Quote:

---

Originally Posted by Jason

You don't index into arrays with curly braces "{}" to index arrays in PHP, you use square ones [].

i.e:

Code:

---

$bin .= chr(hexdec($str{$i}.$str{($i + 1)}));

---

Should actually be

Code:

---

$bin .= chr(hexdec($str[$i].$str[$i + 1]));

---

However this code isn't going to do what the function name implies (convert a hexadecimal string into a binary string).

---

It doesn't matter. PHP is weird, but still a nice language. Curly braces (a.k.a. curly brackets: { }) as well as braces (a.k.a. brackets: [ ]) are just fine. People tend to use brackets because that looks better.

@Cyaphex Do you still need help? Cause I might have the solution for you. You should clearify your question how ever.

Edit:

Code:

---

<?php
$convert = '01234567890abcdef';
$convertFrom = 16; //Hexadecimal
$convertTo = 2; //Binary
echo base_convert($hex, $converFrom, $convertTo);
?>

---

Both $convertFrom and $convertTo have to be between 2 and 36, inclusive. Digits in numbers with a base higher than 10 will be represented with the letters a-z, with a meaning 10, b meaning 11 and z meaning 35. You probably don't want to change this, since you only want a hex2bin. If you want bin2hex, just swap the variables.