HoTDaWg Posted December 29, 2008 Share Posted December 29, 2008 hey there, ive just been working on getting the for loops syntax down but i cant get this simple script to work. in summary, this script counts from the start integer to the stop integer (or vice versa depending upon the users selection) by a select number of increments for a selected number of times. but for some reason, it counts correctly but does not repeat the sets of numbers... any ideas:S <?php error_reporting(E_ALL); print<<<HTML <html> <head> <title>Activity Seven- ask for a low integer, high integer, increment to count by, how many times to count up or down, and whether to count from HL or LH</title> </head> <body> <form method="post"> <input type = "text" name = "startint" value="start integer"><br> <input type = "text" name = "stopint" value="stop integer"><br> <input type = "text" name = "incr" value= "increment"><br> <input type = "text" name = "method" value="hl or lh"><br> <input type = "text" name = "reps" value= "repetitions"><br> <input type = "submit"> </form> HTML; if ((isset($_POST['startint'])) && (isset($_POST['stopint'])) && (isset($_POST['incr'])) && (isset($_POST['method'])) && (isset($_POST['reps']))) { $startint = $_POST['startint']; $stopint = $_POST['stopint']; $incr = $_POST['incr']; $method = $_POST['method']; $reps = $_POST['reps']; for ($c = 1; $c <= $reps; $c++) { if ($method == "lh") { for ($g = &$startint ; $g <= $stopint ; $g += $incr) { print "<br>$c) " . $g; } } else { for ($g = &$stopint ; $g >= $startint ; $g -= $incr) { print "<br>$c) " . $g; } } } } ?> any help would be greatly appreciated thanks. Quote Link to comment Share on other sites More sharing options...
btherl Posted December 29, 2008 Share Posted December 29, 2008 Try removing the "&" symbols from your two inner loops: for ($g = &$startint; ... These ones ^^^ Quote Link to comment Share on other sites More sharing options...
HoTDaWg Posted December 30, 2008 Author Share Posted December 30, 2008 thanks a lot the script works great now out of curiosity what influence did the ampersands have in the inner loops? Quote Link to comment Share on other sites More sharing options...
flyhoney Posted December 30, 2008 Share Posted December 30, 2008 The ampersand means you are referencing the location of $g instead of the value of $g. This means that you were actually saying "$g and $startint point to the same value", and whenever you incremented $g, $startint also incremented. Thus, every rep but the first would skip the for statement since $g was already <= $stopint. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.