The Data Consumer (The WDDX Client)
This script will invoke the WDDX packet generating script using an HTTP call
(using the file function,
then deserializes the returned packet (we use the first line in the returned
array,
because the packet is sent back as a continuous stream).
(using the file function,
then deserializes the returned packet (we use the first line in the returned
array,
because the packet is sent back as a continuous stream).
wddx_consumer.php3
<?php
<HTML>
<HEAD>
<TITLE>WDDX_CONSUMER.PHP3</TITLE>
</HEAD>
<BODY BGCOLOR="white">
<?php
/*
* Script that "uses" the WDDX packet generated by
* wddx_generator.php3
* Jesus M. Castagnetto, 1999-2000
*/
// get data as a WDDX packet
$url_gen = "http://generator.server.com/wddx/wddx_generator.php3";
$packet_in = implode("",file($url_gen));
// deserialize the values
$values = wddx_deserialize($packet_in);
?>
The variable $values will contain an associative array with keys
corresponding to the names of the variables serialized by the WDDX generating
script (in this example: “bins” and “stats”). We assign these variables (in
themselves arrays), and then process them. In this example, we just display
them in a nice table.
corresponding to the names of the variables serialized by the WDDX generating
script (in this example: “bins” and “stats”). We assign these variables (in
themselves arrays), and then process them. In this example, we just display
them in a nice table.
<?php
// extract the bins and stats arrays
$bins = $values["bins"];
$stats = $values["stats"];
// print a table of histogram bins and statistics.
echo "<TABLE><TR><TH>Histogram bins</TH><TH>Statistics</TH></TR>";
echo "<TR VALIGN='top'><TD>";
echo "<TABLE BORDER><TR><TH>Bin value</TH><TH>Count</TH></TR>";
while (list($k,$v) = each ($bins)) {
echo "<TR><TD ALIGN='center'>".sprintf("%.3f",$k)."</TD><TD>".$v."</TD></TR>n";
}
echo "</TABLE>n";
echo "</TD><TD>";
echo "<TABLE>";
while (list($k,$v) = each ($stats)) {
echo "<TR><TD ALIGN='right'>".$k." = </TD><TD>".sprintf("%.3f",$v)."</TD></TR>n";
}
echo "</TABLE>n";
echo "</TD></TR></TABLE>";
?>
The output of the script above will then be:
This shows how easy it is to create scripts that can serve WDDX packets to
remote applications. These remote applications can be another PHP script
(as in the example), or
perhaps a Java servlet or application, or a Python or Perl script
that understands WDDX packets.
This type of
application to application communication is the backbone of, for example, EDI
systems (Electronic Data Interchange) which are widely uses in business to
business transactions, although the EDI specs do not make use of XML, yet.
remote applications. These remote applications can be another PHP script
(as in the example), or
perhaps a Java servlet or application, or a Python or Perl script
that understands WDDX packets.
This type of
application to application communication is the backbone of, for example, EDI
systems (Electronic Data Interchange) which are widely uses in business to
business transactions, although the EDI specs do not make use of XML, yet.
