BUG of FAQ Dynamic drop down

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September 9th, 2004, 10:09 AM

Vasilis6669

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BUG found on FAQ create dynamic drop down menu

Hi
I found this bug when running the download example for creating the multiple dynamic drop down menus.
It was found that the program was running when i had the register_globals =on. I have tried on another machine with register_globalls = off and it was not working as it should.
Is it possible to give a suggestion how to convert the program without having register_globals =on?
thanks

September 9th, 2004, 11:35 AM

nawlej

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RE: BUG found on FAQ create dynamic drop down menu

link, code?

September 9th, 2004, 11:39 AM

Vasilis6669

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RE: BUG found on FAQ create dynamic drop down menu

here is the link
http://www.ashleyit.com/rs/jsrs/select/php/select.php

you can download the code from there

this is the forum link
http://codewalkers.com/faq/10/33.html

September 9th, 2004, 11:49 AM

nawlej

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RE: BUG found on FAQ create dynamic drop down menu

i checked out that code, and it looks like it was written so that it would work with register_globals off. What doesnt work about it since you made the switch?

September 9th, 2004, 11:56 AM

Vasilis6669

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RE: BUG found on FAQ create dynamic drop down menu

well, on the jsrsServer.php in function
function jsrsDispatch($validFuncs )
{
it tries to build the functions to load the data from the database
$func = jsrsBuildFunc($validFuncs);
This is not executed and the
"function +builds +as+ empty +string" error message appears when i run the program.
I am using php v5.0.1

September 9th, 2004, 12:16 PM

nawlej

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RE: BUG found on FAQ create dynamic drop down menu

I think i see where the problem is. jsrsDispatch() calls jsrsBuildFunc(), which needs a global value $F. If $F is not present, it will return an empty string. I dont see it defined anywhere. Anyone else familiar with this and knows where $F comes from?

php Code:

Original - php Code

 
function jsrsDispatch($validFuncs ){
  $func = jsrsBuildFunc($validFuncs);
  
  if ($func != ""){
    $retval = "";
    
    eval("$retval =  " . $func . ";");
    
    if (strlen($retval)>0){
      jsrsReturn($retval."");
    } else {
      jsrsReturn("");
    } 
  } else {
    jsrsReturnError("function builds as empty string");
  }
}
 
function jsrsBuildFunc($validFuncs) {
 global $F;
 
 $func = ""; 
 
 if ($F != "") {
  $func = $F;
  
      
  // make sure it's in the dispatch list
  if (strpos(strtoupper($validFuncs),strtoupper($func))  ===false)
     jsrsReturnError($func . " is not a valid function" );
   
   $func .= "(";
   $i = 0;
    
   //--- To optimize ! --- 
   eval("global $P$i;");
   $Ptmp = "P". $i;
     
   while ($$Ptmp!="") {
    $parm = $$Ptmp;
    $parm = substr($parm,1,strlen($parm)-2);
    $func .= """ . $parm . "",";
    $i++;
    eval("global $P$i;");
    $Ptmp = "P". $i;
   }
   
   if (substr($func,strlen($func)-1,1)==",")  
    $func = substr($func,0,strlen($func)-1);
 
    $func .= ")";
  } 
 
 return $func;
}

September 9th, 2004, 12:40 PM

Vasilis6669

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RE: BUG found on FAQ create dynamic drop down menu

I understand what you are trying to say. Can I have some more help?
<script language = javascript>
function contextPOST( rsPage, func, parms ){

var d = new Date();
var unique = d.getTime() + '' + Math.floor(1000 * Math.random());
var doc = (jsrsBrowser == "IE" ) ? this.container.document : this.container.contentDocument;
doc.open();
doc.write('<html><body>');
doc.write('<form name="jsrsForm" method="post" target="" ');
doc.write(' action="' + rsPage + '?U=' + unique + '">');
doc.write('<input type="hidden" name="C" value="' + this.id + '">');

// func and parms are optional
if (func != null){
doc.write('<input type="hidden" name="F" value="' + func + '">');

if (parms != null){
if (typeof(parms) == "string"){
// single parameter
doc.write( '<input type="hidden" name="P0" '
+ 'value="[' + jsrsEscapeQQ(parms) + ']">');
} else {
// assume parms is array of strings
for( var i=0; i < parms.length; i++ ){
doc.write( '<input type="hidden" name="P' + i + '" '
+ 'value="[' + jsrsEscapeQQ(parms[i]) + ']">');
}
} // parm type
} // parms
} // func

doc.write('</form></body></html>');
doc.close();
doc.forms['jsrsForm'].submit();
}
</script>
This is jsrsClient.js function contextPOST and has a hidden type F name.

September 9th, 2004, 04:40 PM

nawlej

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RE: BUG found on FAQ create dynamic drop down menu

k
easy.

Go into that function for jsrsBuildFunc()

and change:

global $F;

to

global $_POST['F'];

you may just be able to get away with $_POST['F'] (as a matter of fact, im pretty sure you can because its in a super global array.) Give it a shot.

September 13th, 2004, 06:43 AM

Vasilis6669

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RE: BUG found on FAQ create dynamic drop down menu

ok what you have told me i have changed it and work fine but there is another problem i cannot figure it out.
This is the function

php Code:

Original - php Code

 
function jsrsBuildFunc($validFuncs) {
 global $F;
 $F= $_POST['F'];
 $func = ""; 
 
 if ($F != "") 
 {
      $func = $F;
        //echo("<script language=javascript>alert('xxx $func');<script>");
      // make sure it's in the dispatch list
      if (strpos(strtoupper($validFuncs),strtoupper($func))  ===false)
         jsrsReturnError($func . " is not a valid function" );
       
       $func .= "(";
       $i = 0;
        
       //--- To optimize ! --- 
       eval("global $P$i;");
       $P = $_POST['P'.$i];
        echo("<script language=javascript>alert('P is $P$i');</script>");
       $Ptmp = "P". $i;
       $Ptmp = $_POST['P'. $i];
        //$Ptmp = $_POST['PO'];
       
       echo("<script language=javascript>alert('Ptmp is $Ptmp and pptmp is $$Ptmp');</script>");
       
       while ($$Ptmp!="") 
       {
         echo("<script language=javascript>alert('Hello ');</script>");
        $parm = $$Ptmp;
        $parm = substr($parm,2,strlen($parm)-2);
        $func .= """ . $parm . "",";
        
        $i++;
        eval("global $P$i;");
        $Ptmp = "P". $i;
        
      }
   
   if (substr($func,strlen($func)-1,1)==",")  
   
    $func = substr($func,0,strlen($func)-1);
   
    $func .= ")";
     echo("<script language=javascript>alert('function $func P is $P');</script>");
  } 
//echo("<script language=javascript>alert('xxx $func');<script>");
 return $func;
}

So $F = $_POST['F'] works fine, the first option list loads perfect, on the second time it reads the first option parameter but it does not pass it into the method. The problem that i have found was that the $$Ptmp has a value and does not enter the while loop. Any help please?

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