webmaster1 Posted February 8, 2009 Share Posted February 8, 2009 Hi All, I need to create a two dropdowns where the results of the second are dependant on the selection of the first. I don't even need to dynamically load the options from sql since they will not be changing. Can I do with PHP alone? I'd apreciate any layman links. I've tried javascript examples but all of them are causing problems when I integrate them into my page for some reason. Link to comment https://forums.phpfreaks.com/topic/144348-solved-basic-dynamic-dependant-drop-down-no-sql-involved/ Share on other sites More sharing options...
webmaster1 Posted February 8, 2009 Author Share Posted February 8, 2009 I already have a form that inserts data into a table. I want to also be able the write the values of each dropdown back my table while at the same time having the dependability of second list. Link to comment https://forums.phpfreaks.com/topic/144348-solved-basic-dynamic-dependant-drop-down-no-sql-involved/#findComment-757453 Share on other sites More sharing options...
.josh Posted February 8, 2009 Share Posted February 8, 2009 If you want to have dropdown#2 change based on dropdown#1, you have to have alternate lists or at least alternate list id's stored somewhere, be it flatfile, database or hardcoded inot your script. If you want to do it with only php, no sql etc.., you're going to have to select something from dropdown#1 and hit a submit button of some kind and have the whole page refresh, with the lists hardcoded as arrays in your script. PHP will not dynamically change dropdown#2 in "real-time" before form submit. It's a server-side language, and the form is on the client. Link to comment https://forums.phpfreaks.com/topic/144348-solved-basic-dynamic-dependant-drop-down-no-sql-involved/#findComment-757454 Share on other sites More sharing options...
webmaster1 Posted February 8, 2009 Author Share Posted February 8, 2009 Thats good to know. Based on that I guess PHP alone wont work since I need the form to submit itself rather than reload on submit. I think I spotted where I was going wrong with the javascipt. I had a form within a form by mistake. Will post back shortly to confirm. Link to comment https://forums.phpfreaks.com/topic/144348-solved-basic-dynamic-dependant-drop-down-no-sql-involved/#findComment-757460 Share on other sites More sharing options...
webmaster1 Posted February 8, 2009 Author Share Posted February 8, 2009 I've got the javascript working. I'll post it here for anyone else since it leverages php form functionality: <html> <head> <script type="text/javascript"> function setOptions(chosen) { var selbox = document.myform.opttwo; selbox.options.length = 0; if (chosen == " ") { selbox.options[selbox.options.length] = new Option('Please select a primary result first',' '); } if (chosen == "1") { selbox.options[selbox.options.length] = new Option('first choice - option one','oneone'); selbox.options[selbox.options.length] = new Option('first choice - option two','onetwo'); } if (chosen == "2") { selbox.options[selbox.options.length] = new Option('second choice - option one','twoone'); selbox.options[selbox.options.length] = new Option('second choice - option two','twotwo'); } if (chosen == "3") { selbox.options[selbox.options.length] = new Option('third choice - option one','threeone'); selbox.options[selbox.options.length] = new Option('third choice - option two','threetwo'); } } </script> </head> <body><form name="myform" id="myform"> <select name="optone" size="1" onchange="setOptions(document.myform.optone.options[document.myform.optone.selectedIndex].value);"> <option value=" " selected="selected"> Primary Results </option> <option value="1">First Choice</option> <option value="2">Second Choice</option> <option value="3">Third Choice</option> </select><br> <br> </form></body> </html> <select name="opttwo" size="1"> <option value=" " selected="selected"> Secondary Results </option> </select> Link to comment https://forums.phpfreaks.com/topic/144348-solved-basic-dynamic-dependant-drop-down-no-sql-involved/#findComment-757472 Share on other sites More sharing options...
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