note 87702 deleted from function.dechex by danbrown

Note Submitter: mandor at mandor dot net Reason: integrated ---- Here's a simple function that converts signed decimal numbers to hexadecimal strings. It can handle numbers virtually as big as you want and you can optionally set a number of digits for the result which will then be padded appropriately. <?php function dec2hex($dec, $digits=false) { // If the decimal number is negative, we'll have to invert the result in the end. $invert = $dec < 0 ? true : false; $hex = ''; while($dec) { // Calculates the modulus, converts it to hex and adds it to the result. $hex .= dechex(abs(bcmod($dec, '16'))); // Divises the decimal number by 16 and loop. $dec = bcdiv($dec, '16', 0); } // Adds some padding to get the required number of digits if needed. if ($digits) { while (strlen($hex) < $digits) { $hex .= '0'; } } // Inverts the result if the decimal number was negative. if ($invert) { for ($i = 0; $i < strlen($hex); $i++) { $hex[$i] = dechex(($i ? 15 : 16) - hexdec($hex[$i])); } } // Returns the result (it needs to be reversed because of the way it was computed). return strrev($hex); } ?>