mkli Posted May 11, 2007 Share Posted May 11, 2007 Hi everybody I am a begginer in php language. I have created a form to retrieve data from mysql database I want to create two combo boxes for two tables of my data. When I ma using the one everything is ok but when I add the second they do not work as I do not know what exactly to change in javascript and php code. The code of the page is "linked-combo4.php": <html> <head> <title>Linked comboboxes with php-mysql</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </head> <?php // we need to have the previously made choice from a database //or not if this form is accessed the first time // change $passed_value and $passed_value2 to see the effect of the code 'ON LOAD' if (!isset($passed_value)){ $passed_value=2;}// example if (!isset($passed_value2)){ $passed_value2=3;}// example // in the body onload sequence we call a function 'redirect' to set our comboboxes ?> <body onLoad="redirect(<?php echo $passed_value.','.$passed_value2?>,2)"> <?php // standard conexxion see the included file conexxion.php include('conexxion.php'); // select the data from table 'hoofd_akt' for the main aktivities for the first combobox called "example" $sql="select * from hoofd_akt"; // select the data from 'sub_akt' for the linked sub category for the second combo box stage 2 $sql2="select * from sub_akt WHERE vr_sleutel=".$passed_value; $result=mysql_query($sql,$id_link) or die (mysql_error()); $result2=mysql_query($sql2,$id_link) or die (mysql_error()); ?> <!-- --><form name="doublecombo"> <select name="example" size="1" onChange="redirect(this.options.selectedIndex,<?php echo $passed_value.','.$passed_value2?>)"> <option>-select-</option> <?php // echo the options for box 1 and 2 // as the idnumber is stored in the table with all results, here we compare to set SELECTED // this is a standard formula for retrieving stored info about a box selection while ($newarray=mysql_fetch_array($result)) { echo '<option value="'.$newarray['idnumber'].'" '; if ($newarray['idnumber']==$passed_value) {echo "SELECTED";}; echo '>'.$newarray['akt_groep'].'</option>'.'\n'; } ?> </select> <select name="stage2" size="1"> <?php // here we do the same for the second box while ($newarray=mysql_fetch_array($result2)) { echo '<option value="'.$newarray['idnumber'].'" '; if ($newarray['idnumber']==$passed_value2) {echo "SELECTED";}; echo '>'.$newarray['akt_titel'].'</option>'; $x=$x+1;} ?> </select> <script> <!-- /* The original JScript can be found in nearly every JScript website I'm just mentioning one Courtesy of SimplytheBest.net - http://simplythebest.net */ var groups=document.doublecombo.example.options.length var group=new Array(groups) for (i=0; i<groups; i++){ group=new Array } <?php //Here comes the data from the two linked tables in a format suited for JScripting // into the script mentioned here above $sql="select * from hoofd_akt"; $result=mysql_query($sql,$id_link) or die (mysql_error()); $x=0;$y=0;$m=0;$z=1; while ($newarray=mysql_fetch_array($result)) { echo "group[0][$m]=new Option(\"".$newarray['akt_groep'].'","'.$newarray['idnumber'].'")'."\n"; $sql2="select * from sub_akt WHERE vr_sleutel=".$newarray['idnumber']." order by idnumber asc"; $result2=mysql_query($sql2,$id_link) or die (mysql_error()); while ($newarray2=mysql_fetch_array($result2)) { echo "group[$z][$y]=new Option(\"".$newarray2['akt_titel'].'","'.$newarray2['idnumber'].'")'."\n"; $y=$y+1; } $z=$z+1; $y=0; $m=$m+1; } ?> var temp=document.doublecombo.stage2 function redirect(x,d,f){ for (m=temp.options.length-1;m>0;m--) temp.options[m]=null for (i=0;i<group[x].length;i++){ temp.options=new Option(group[eval(x)].text,group[eval(x)].value) } temp.options[d].selected=true } //--> </script> </form><!-- --> </body> </html> The other tables that I want to add is: table1: object with fields idnumber,code table2:obj_description with fields idnumber,no,description Thanks Marina Link to comment https://forums.phpfreaks.com/topic/50958-linked-comboboxes-with-php-and-mysql/ Share on other sites More sharing options...
Barand Posted May 11, 2007 Share Posted May 11, 2007 The baaSelect link in my sig may help if you want the pure javascript method. Alternatively you can use AJAX technique (see other link) Link to comment https://forums.phpfreaks.com/topic/50958-linked-comboboxes-with-php-and-mysql/#findComment-250812 Share on other sites More sharing options...
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