RSS Feed Parsing with Limit

[Noyb]

I've set up a news links section using the RSS parsing tutorial found
here: http://www.sitepoint.com/article/560
Everything works great but depending on the feed source there may be 3
news links or 30. How can I limit the amount of titles, descriptions,
and links output to be no more than 10?
Thanks,
Steve.

[MY SLIGHTLY MODIFIED CODE PASTED BELOW]
<dl>
<?php

$insideitem = false;
$tag = "";
$title = "";
$description = "";
$link = "";
$feedurl="http://rss.news.yahoo.com/rss/business";

function startElement($parser, $name, $attrs) {
global $insideitem, $tag, $title, $description, $link;
if ($insideitem) {
$tag = $name;
} elseif ($name == "ITEM") {
$insideitem = true;
}
}

function endElement($parser, $name) {
global $insideitem, $tag, $title, $description, $link;
if ($name == "ITEM") {
$description=str_replace("'","",$description); //take out ' characters
that were causing probs with tooltip javascript
printf("<dt><a href='%s' target='mtgnews' onmouseover=\"return
overlib('%s')\" onmouseout=\"return nd();\">%s</a></dt>",
trim($link),htmlspecialchars(trim($description)),h tmlspecialchars(trim($title)));

$title = "";
$description = "";
$link = "";
$insideitem = false;
}
}

function characterData($parser, $data) {
global $insideitem, $tag, $title, $description, $link;
if ($insideitem) {
switch ($tag) {
case "TITLE":
$title .= $data;
break;
case "DESCRIPTION":
$description .= $data;

break;
case "LINK":
$link .= $data;
break;
}
}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
$fp = fopen($feedurl,"r")
or die("Business News Unavailable.");

while ($data = fread($fp, 4096))
xml_parse($xml_parser, $data, feof($fp))
or die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
fclose($fp);
xml_parser_free($xml_parser);

?>
</dl>

[Janwillem Borleffs]

Noyb wrote:

I've set up a news links section using the RSS parsing tutorial found
here: http://www.sitepoint.com/article/560
Everything works great but depending on the feed source there may be 3
news links or 30. How can I limit the amount of titles, descriptions,
and links output to be no more than 10?

Try this:

function endElement($parser, $name) {
global $insideitem, $tag, $title, $description, $link;
static $counter = 0;
if ($name == "ITEM" && !(++$counter > 10)) {
....
JW

[Terence]

use a static counter.
for infor on static varaibles see
http://www.php.net/manual/en/languag...bles.scope.php

lets assume you the number of items you want to limit it to is in
$limit. so in your startElement() function

static $n = 0;

if($n++ < $limit) {
// main function processing goes here.
}

Noyb wrote:

I've set up a news links section using the RSS parsing tutorial found
here: http://www.sitepoint.com/article/560
Everything works great but depending on the feed source there may be 3
news links or 30. How can I limit the amount of titles, descriptions,
and links output to be no more than 10?
Thanks,
Steve.

[MY SLIGHTLY MODIFIED CODE PASTED BELOW]
<dl>
<?php

$insideitem = false;
$tag = "";
$title = "";
$description = "";
$link = "";
$feedurl="http://rss.news.yahoo.com/rss/business";

function startElement($parser, $name, $attrs) {
global $insideitem, $tag, $title, $description, $link;
if ($insideitem) {
$tag = $name;
} elseif ($name == "ITEM") {
$insideitem = true;
}
}

function endElement($parser, $name) {
global $insideitem, $tag, $title, $description, $link;
if ($name == "ITEM") {
$description=str_replace("'","",$description); //take out '
characters that were causing probs with tooltip javascript
printf("<dt><a href='%s' target='mtgnews' onmouseover=\"return
overlib('%s')\" onmouseout=\"return nd();\">%s</a></dt>",
trim($link),htmlspecialchars(trim($description)),h tmlspecialchars(trim($title)));
$title = "";
$description = "";
$link = "";
$insideitem = false;
}
}

function characterData($parser, $data) {
global $insideitem, $tag, $title, $description, $link;
if ($insideitem) {
switch ($tag) {
case "TITLE":
$title .= $data;
break;
case "DESCRIPTION":
$description .= $data;

break;
case "LINK":
$link .= $data;
break;
}
}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
$fp = fopen($feedurl,"r")
or die("Business News Unavailable.");

while ($data = fread($fp, 4096))
xml_parse($xml_parser, $data, feof($fp))
or die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
fclose($fp);
xml_parser_free($xml_parser);

?>
</dl>

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