Hello fellow developers,
Let me start by saying I'm still a PHP noob so please don't go too hard on me if I my code reflects this noobishness...
So I'm trying to build a (very) simple RSS reader using jQuery and PHP. When the user clicks on an option from a dropdown, an AJAX call is made and passes the url selected from the list to a PHP script.
The PHP script then loads the appropriate xml file from an 'xmlcache' folder. Everything is working just fine for files named as such:
somefilename_1231231231.xml
The problem is that I need it to be able to load files which have been urlencoded such as:
http%3A%2F%2Ffeeds.feedburner.com%2Fajaxian_1235523548
In case you're wondering, the numbers at the end are a timestamp which will determine if the reader will load a cached copy of the desired xml file (if it's less than an hour old) or if it needs to get a fresh version (this part of the code is not written yet). Here is a look at my script thus far:
<?php
$url = "./xmlcache/" . urlencode($_REQUEST['url']); //access url from AJAX call
echo $url; //outputs -> "./xmlcache/http%3A%2F%2Ffeeds.feedburner.com%2Fajaxian_1235523548.xml", which is the same as the file's name
$curTime = time();
$urlParts = explode('_', $url);
$urlTime = intval($urlParts[1]);
$diff = $curTime - $urlTime;
$urlAge = 60 * 60; //60sec * 60min = 3600sec or 1 hour
if(file_exists($url)){
if($diff > $urlAge){ //the > will be switched to < to make logical sense once testing is done.
$xml = simplexml_load_file($url);
//ROOT TAG
foreach($xml as $key0 => $value){
echo "$key0: $value";
foreach($value->attributes() as $attributeskey0 => $attributesvalue1){
echo "$attributeskey0: $attributesvalue1";
}
echo "<br />";
//1 LEVEL BELOW ROOT TAG
foreach($value as $key => $value2){
echo "$key: $value2";
foreach($value2->attributes() as $attributeskey => $attributesvalue2){
echo "$attributeskey = $attributesvalue2";
}
echo '<br />';
//2 LEVELS BELOW ROOT TAG
foreach($value2 as $key2 => $value3){
echo "$key2: $value3";
foreach($value3->attributes() as $attributeskey2 => $attributesvalue3){
echo "$attributeskey2 = $attributesvalue3";
}
echo '<br />';
//3 LEVELS BELOW ROOT TAG
foreach($value3 as $key3 => $value4){
echo "$key3: $value4";
foreach($value4->attributes() as $attributeskey3 => $attributesvalue4){
echo "$attributeskey3 = $attributesvalue4";
}
echo '<br />';
//4 LEVELS BELOW ROOT TAG
foreach($value4 as $key4 => $value5){
echo "$key4: $value5";
foreach($value5->attributes() as $attributeskey4 => $attributesvalue5){
echo "$attributeskey4 = $attributesvalue5";
}
echo '<br />';
//5 LEVELS BELOW ROOT TAG
foreach($value5 as $key5 => $value6){
echo "$key5: $value6";
foreach($value6->attributes() as $attributeskey5 => $attributesvalue6){
echo "$attributeskey5 = $attributesvalue6";
}
echo '<br />';
}
}
}
}
echo '<br />';
}
echo '<br />';
}
}else{
//need to create the XML file from scratch, do a curl function, or read from a text file
echo "need a new version";
//@unlink("$url);
}
}else{
echo "That file does not exist.<br/>";
}
?>
The error message I'm getting is this:
Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "./xmlcache/http%3A%2F%2Ffeeds.feedburner.com%2Fajaxian_1235523548.xml" in C:\wamp\www\reader\loadfeed.php on line 13
Warning: Invalid argument supplied for foreach() in C:\wamp\www\reader\loadfeed.php on line 16
The second error is obviously thrown because the file doesn't get loaded.
I appreciate any help you gurus have to offer, and if you have any suggestions for the best way to load a fresh version that will be handled by the first else statement, I'm all ears.
Thanks guys!
