I'm having a bit of a problem with the following classes.
Class pulldown builds a select box using a set of arrays containing
the relevant data.
class pulldown_db is written to extend the class to allow the use of
the class with a database.
Now, the problem appears in pulldown_db. If you notice the code at
the end which tests the objects, $dbpul never seems to get created.
I'm rather puzzled as to why this should be.
<?
// Select box building classes written by Steve Dix Feb 2002.
//
// These are replacements for the functions "pulldown_array" and
"pulldown_database"
// They are not DIRECT replacements, having different parameters.
// Please see the bottom for examples of how to initialise and use
the classes.
//
// New input string should be :
//
// array(control), array(ausgabe[ausgabe|wert|zieldatei]
//
// Control array should be enumerated.
// Class to build and display a selection box for use in a form from
a supplied array.
class pulldown
{
var $ausgabe=array();
var $control=array();
var $mehrfach;
var $onchange_text;
var $class_text;
var $size_text;
// constructor for class copies supplied arrays - control containing
control information, ausgabe containing data
// then calls the private method build_list() to sort out internal
flags based on the control array.
// note that the control array makes use of associative indexes to
make the source more self-documenting.
function pulldown($control,$ausgabe)
{
global $DEBUG;
echo "Initialise<br>\n";
while(list($key,$data)=each($control))
{
$this->control[$key]=$data;
if($DEBUG) echo "$key,$data<br>\n";
}
while(list($key,$data)=each($ausgabe))
{
while(list($k,$d)=each($data))
{
$this->ausgabe[$key][$k] = $d;
if($DEBUG) echo "$key $k $d<br>\n";
}
}
// Mehrfach-Auswahl
$this->build_list();
}
// public method write - writes the complete html select code
function output_select()
{
// Pulldown bauen
echo "$text\n";
echo "<select name='".$this->control[name]."'".$this-
>onchange_text.$this->size_text.$this->class_text.$mehrfach.">\n";
// Auswahl
$cnt = count($this->ausgabe[ausgabe]);
if(DEBUG) echo "cnt $cnt<br>\n";
for($i=0;$i<$cnt;$i++)
{
// Selektieren
if($this->ausgabe[ausgabe][$i]==$this->control[selektiert])
{
$select = "selected";
}
else
{
$select="";
}
if($this->ausgabe[wert][$i]!="0" && !empty($this-
>ausgabe[wert][$i]))
{
$wert = $this->ausgabe[wert][$i];
}
else
{
$wert = $this->ausgabe[ausgabe][$i];
}
echo "<option value='$wert' $select>".$this-
>ausgabe[ausgabe][$i]."</option>\n";
}
echo "</select>\n";
}
// build_list - private method to set various variables according to
the control array.
function build_list()
{
$this->mehrfach = ($this->control[mehrfach]=="1") ? ' multiple'
: '';
$this->onchange_text = ($this->control[onchange]!="" && $this-
>control[onchange]!="0")
? " onChange='".$onchange."' "
: "";
$this->class_text = ($this->control["class"] != "")
? "class='".$this->control["class"]."' "
: "";
$this->size_text = ($this->control[size]!="")
? "size='".$this->control[size]."' "
: "";
}
}
// class pulldown_database extends the above class to deal with
databases
// it deliberately makes use of inheritance so that you can still use
the ausgabe array to add
// options which cannot be found in the database.
class pulldown_db extends pulldown
{
// private method used to set control info based on control
function build_list()
{
pulldown::build_list();
echo "<br>build list<br>\n";
// now we can extend the ausgabe array by using the extra item
"query" which should be included in the control array.
$qu = mysql_query($this->control[query]);
$cnt = @mysql_numrows($qu);
echo $this->control[query]." cnt $cnt<br>\n";
for($i=0;$i<$cnt;$i++)
{
list($this,$that) = mysql_fetch_row($qu);
echo "this $this that $that<br>\n";
$this->ausgabe[ausgabe][]=$this;
$this->ausgabe[wert][]=$that;
}
}
}
// Example pulldown array - uncomment to see how it works.
$pull = new pulldown(
array("name"=>"test", "size"=>"", "text"=>"A test select",
"mehrfach"=>"", "selektiert"=>"", "onchange"=>"", "class"=>"" ),
array( "ausgabe"=>array("moo","quack","baa","woof"),
"wert"=>array(1,2,3,4) )
);
$pull->output_select();
// here you connect to the db - pconnect removed for security
$dbpul = new pulldown_db(
array("query"=>"select id,medientyp from
medientyp","name"=>"database", "size"=>"", "text"=>"Another test
select", "mehrfach"=>"", "selektiert"=>"", "onchange"=>"",
"class"=>""),
array("ausgabe"=>array("--"), "wert"=>array(0))
);
if(is_object($dbpul))
{
$dbpul->output_select();
}
else
echo "Fail $dbpul<br>\n";
?>Steve Dix>==============================<[EMAIL PROTECTED]
http://www.stevedix.de/
http://www.snorty.net/
http://www.mp3.com/simpletons
http://www.geocities.com/motorcity/2706
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