Leer feed para actualizar mi base de datos

[almagropaco_]

Bueno, no se porque no me deja editar el mensaje anterior. Bueno te digo como haria yo con el codigo que tengo.

El Lector RSS, que uso es este:

<?php

/*
Created by Global Syndication's RSS Parser
http://www.globalsyndication.com/rss-parser
*/

set_time_limit(0);

$file = "http://www.lanacion.com.ar/herramientas/rss/index.asp?origen=2";

$rss_channel = array();
$currently_writing = "";
$main = "";
$item_counter = 0;

function startElement($parser, $name, $attrs) {
global $rss_channel, $currently_writing, $main;
switch($name) {
case "RSS":
case "RDF:RDF":
case "ITEMS":
$currently_writing = "";
break;
case "CHANNEL":
$main = "CHANNEL";
break;
case "IMAGE":
$main = "IMAGE";
$rss_channel["IMAGE"] = array();
break;
case "ITEM":
$main = "ITEMS";
break;
default:
$currently_writing = $name;
break;
}
}

function endElement($parser, $name) {
global $rss_channel, $currently_writing, $item_counter;
$currently_writing = "";
if ($name == "ITEM") {
$item_counter++;
}
}

function characterData($parser, $data) {
global $rss_channel, $currently_writing, $main, $item_counter;
if ($currently_writing != "") {
switch($main) {
case "CHANNEL":
if (isset($rss_channel[$currently_writing])) {
$rss_channel[$currently_writing] .= $data;
} else {
$rss_channel[$currently_writing] = $data;
}
break;
case "IMAGE":
if (isset($rss_channel[$main][$currently_writing])) {
$rss_channel[$main][$currently_writing] .= $data;
} else {
$rss_channel[$main][$currently_writing] = $data;
}
break;
case "ITEMS":
if (isset($rss_channel[$main][$item_counter][$currently_writing])) {
$rss_channel[$main][$item_counter][$currently_writing] .= $data;
} else {
$rss_channel[$main][$item_counter][$currently_writing] = $data;
}
break;
}
}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
if (!($fp = fopen($file, "r"))) {
die("could not open XML input");
}

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

// output HTML
print ("<div class=\"channelname\">" . $rss_channel["TITLE"] . "</div>");

if (isset($rss_channel["ITEMS"])) {
if (count($rss_channel["ITEMS"]) > 0) {
for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) {
if (isset($rss_channel["ITEMS"][$i]["LINK"])) {
print ("\n<div class=\"itemtitle\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</div>");
} else {
print ("\n<div class=\"itemtitle\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</div>");
}
print ("<div class=\"itemdescription\">" . $rss_channel["ITEMS"][$i]["DESCRIPTION"] . "</div><br />"); }
} else {
print ("<b>There are no articles in this feed.</b>");
}
}
print ("<br/><span style='font-size:xx-small;'>www.nelsonk.com.ar</span>");
?>

Lo saque del problema que le surgio a Samuel2005, http://www.forosdelweb.com/f18/leer-rss-con-php-388826/

Lo que tu podrias hacer es la consulta a partir de estas lineas:
(El codigo varia un poco ya que este es el personalizado por mi):

if (isset($rss_channel["ITEMS"])) {
if (count($rss_channel["ITEMS"]) > 0) {
for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) {
if (isset($rss_channel["ITEMS"][$i]["LINK"])) {
print ("\n<div class='post'><h2 class='title'>" . utf8_decode($rss_channel["ITEMS"][$i]["TITLE"]) . "</h2>\n");
} else {
print ("\n<div class='post'><h2 class='title'>" . utf8_decode($rss_channel["ITEMS"][$i]["TITLE"]) . "</h2>\n");
}
print ("<div class='entry'><p>" . utf8_decode($rss_channel["ITEMS"][$i]["DESCRIPTION"]) . "</p></div>\n</div>\n"); }
} else {
print ("<b>No hay articulos.</b>");
}

}

En ese mismo if lo que deberias hacer es la consulta e insertar, por ejemplo:

INSERT INTO noticias (titulo, descripcion) VALUES ('$rss_channel[ITEMS][$i][TITLE]', '$rss_channel[ITEMS][$i][DESCRIPTION]')

Eso seria un ejemplo basico, podrias personalizarlo a tu manera. Suerte