Entry
How do you pass a URL ?query via javascript function ?
Jan 28th, 2000 01:37
Allan Taylor,
The URL query in the form <filename?query doesn't pass the referenced
variables to a new file via a javascript function. It loses state and
instead of passing "100" for example it passes the string "$query".
To preserve state the referenced variable needs to saved as a text file
and then retrieved in the new document by using the following code.
In the <head> section of the calling file is the following javascript
function
<SCRIPT LANGUAGE="JavaScript">
<!--
function doSubmit($ref)
{
location.href = "filename?selected =$ref";
}
//-->
</script>
<?
IF(ISSET($selected)) { /* If a value has been passed */
$ref = $selected 0; // converts a string into an integer
fputs($fp, $ref); // Write the value of $ref to ref.txt
$fp = fopen("ref.txt", "w"); // Open a file pointer
fclose($fp); // Closes file
The following script opens a new file automatically by calling the
javascript function in the <head>
echo "<SCRIPT LANGUAGE=\"JavaScript\">";
{
echo "doSubmit($ref)";
}
echo "</script>";
}
In the new file the text file is recovered and passed into a variable
IF(ISSET($selected)) /* If there has been given a value for selected
product */
{ // begin IF $ref set
Echo " The selected item = $selected";
$fp = fopen("ref.txt", "r"); // Open a file pointer
$item = fgets($fp, 4096); // Read the value of ref.txt into a variable
fclose($fp); // Close the file pointer
