Passing PHP Array to Javascript Function.

[lbabinz]

Hello,

Basically what I want to do is change the contents of a Combo Box using the onChange event from a different Combo Box. The problem arises that the contents I want to change the combo box to need to be loaded from a database via php. What I want to do is pass the array of values taken from the database to a javascript function using the onChange event and then load the values into the other combo box. However, when I pass the array into the javascript function, it just gets the value of "undefined". Does anyone know of a way to get around this? Thank you very much in advance.

[br__ken]

i wrote this a while ago for somebody with the same problem.. this will put the array in JS, but the functions are you job 🙂

the code should explain itself, along with the js source-> but if you need me to clarify anything, just lemme know

$a=array(
"parent1"=>array("1child1","1child2"),
"parent2"=>array("2child1","2child2")
);
// hide child arrays in js //
echo "\n<script language='javascript'>\n";
foreach($a as $key=>$value)
{
	echo "$key=new Array(";

for($i=0;$i<count($value);$i++)
{
	echo "\"" . $value[$i] . "\"";
	if($i<(count($value)-1))
		echo ",";
}
echo ");\n";
// print js functions //
echo "function pop" . $key . "(){}\n\n";
}
echo "</script>";

[sarahk]

don't worry too much about what my script does, just look at how it's constructed. In this case it's not inside a function but the array gets built into the html and then utilised.

See it working at http://property.digitalrice.com/muck/example.html - it's the iframe which uses the code, view source to see what's output.

<script language="Javascript">
    var frm = parent.document.MyForm;
    var updates = new Array();
    var updatecnt = 0;
<?php

$animals = array('cow','dog','cat','lion','mouse');
$noises  = array('moo', 'woof', 'miaow', 'roar', 'squeek');
$babies  = array('calf', 'puppy', 'kitten', 'cub', '?');

for ($i = 0; $i < 5; $i++)
{
  if ($animal == $animals[$i])
  {
    echo "updates[updatecnt++] = new Array('noiseMade','" . $noises[$i] . "');\n";
    echo "updates[updatecnt++] = new Array('babyName','" . $babies[$i] . "');\n";
  }
}
?>
    if (updatecnt > 0)
      for (var i = 0; i < updatecnt; i++)
        frm[updates[i][0]].value = updates[i][1];

</script>