note 108794 added to function.dechex

A friend of mine pointed out that I made some mistakes on the post I made earlier so I have re-written my php function for ANY length dec-to-hex conversion. The function take a string input and return a hex which is represented by a string. Note that I assumed that the user's input is a valid number thus I did NOT include any input verifying mechanism. So you have to do the verifying part yourself. The administrator of www.php.net please remove my post earlier, thanks. <?php // ==================== Support functions ==================== // The backoff function during contention function backoff() { $miliSeconds = rand(0, 100); //Sleep for 0 - 100 miliseconds, to avoid collision usleep(round($miliSeconds*1000)); } // Replace a Setting in the ini // bool set_ini(string $old_filename, string $new_filename) // $old_filename = The old log file name // $new_filename = the new log file name function set_ini($old_filename, $new_filename) { // Open the file for writing $fp = fopen('feedback_server.ini', 'c+'); $canWrite = false; //Waiting until file is locked for writing while (!$canWrite) { $canWrite = flock($fp, LOCK_EX); backoff(); } $content = fread($fp, filesize('feedback_server.ini')); $new_content = str_replace($old_filename, $new_filename, $content); ftruncate($fp, 0); fseek($fp, SEEK_SET); fwrite($fp, $new_content); fclose($fp); } // The function to convert ANY integers to hex // We use it in the script to convert 64-bit integer to hex // Input: Decimal string // Output: Hex string // ******** In this function we pad zeros in front of the result hex to represent the number as 64-bits function dec2hex($str) { $hex = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'); // Result value $hexval = ''; // The quotient of each division operation $quotient = $str; $divisor = $str; // The ending condition $flag = true; while($flag) { $len = strlen($divisor); $pos = 1; $quotient = 0; // Take the first two digits as temp divisor and advance by 1 each iteration $div = substr($divisor, 0, 2); $remainder = $div[0]; while($pos < $len) { // Calculate the next div $div = $remainder == 0 ? $divisor[$pos] : $remainder.$divisor[$pos]; $remainder = $div % 16; $quotient = $quotient.floor($div/16); $pos++; } // Recast the divisor as string to make the $divisor[$pos] work $quotient = trim_left_zeros($quotient); $divisor = "$quotient"; $hexval = $hex[$remainder].$hexval; // If the divisor is smaller than 15 then end the iteration if (strlen($divisor)<=2) { if ($divisor<15) { $flag = false; } } } $hexval = $hex[$quotient].$hexval; $hexval = trim_left_zeros($hexval); // Pad zeros (only because we are using this function for 64-bit integers) //$hexval = str_repeat('0', 16-strlen($hexval)).$hexval; return $hexval; } // Trim the zeros at the left of a number function trim_left_zeros($str) { $str = ltrim($str, '0'); if (empty($str)) { $str = '0'; } return $str; } ?> ---- Server IP: 69.147.83.197 Probable Submitter: 61.93.225.26 ---- Manual Page -- http://www.php.net/manual/en/function.dechex.php Edit -- https://master.php.net/note/edit/108794 Del: integrated -- https://master.php.net/note/delete/108794/integrated Del: useless -- https://master.php.net/note/delete/108794/useless Del: bad code -- https://master.php.net/note/delete/108794/bad+code Del: spam -- https://master.php.net/note/delete/108794/spam Del: non-english -- https://master.php.net/note/delete/108794/non-english Del: in docs -- https://master.php.net/note/delete/108794/in+docs Del: other reasons-- https://master.php.net/note/delete/108794 Reject -- https://master.php.net/note/reject/108794 Search -- https://master.php.net/manage/user-notes.php