URL Encoding

URL-encodes string. This algorithm is convenient when encoding a string to be used in a query part of a URL, as a convenient way to pass variables to the next page.

									function DecimalToHexadecimal($dec)
{
	if ($dec < 1) return "0";

	$hex = $dec;
	$hexStr = "";

	while ($dec > 0)
	{
		$hex = $dec % 16;

		if ($hex < 10)
			$hexStr = substr_replace($hexStr, chr($hex + 48), 0, 0);
		else
			$hexStr = substr_replace($hexStr, chr($hex + 55), 0, 0);

		$dec = floor($dec / 16);
	}

	return $hexStr;
}

function EncodeURL($data, $count) {
	$result = "";
	
	for ($i = 0; $i < $count; $i++)
	{
		$c = $data[$i];

		if (('a' <= $c && $c <= 'z') || ('A' <= $c && $c <= 'Z') || ('0' <= $c && $c <= '9'))
		{
			$result .= $c;
		}
		else
		{
			$result .= "%";
			$result .= str_pad(DecimalToHexadecimal(ord($c)), 2, "0", STR_PAD_LEFT);
		}
	}
	
	return $result;
}

Example

									$data = "jdfgsdhfsdfsd 6445dsfsd7fg/*/+bfjsdgf%$^";
$value = EncodeURL($data, strlen($data));

Output

									jdfgsdhfsdfsd%206445dsfsd7fg%2F%2A%2F%2Bbfjsdgf%25%24%5E