How to convert an RSS XML feed in to array using PHP

Question

I hope the title means all :-)

How to convert an RSS XML feed in to array using PHP

How can this be done...

For example: I am using the below URL:

https://www.googleapis.com/shopping/search/v1/public/products?key=AIzaSyBnjn7hr6Zok78f35Q49Od-3wtTYeVH3NI&country=US&q=digital+camera&alt=atom

This results in XML pattern. I am in need to convert this in to array format using PHP.

Any help will be thankful and grateful.

Thanks in advance....

Solution

Step by Step

How to Read an RSS Feed With PHP

<?php

function getFeed($feed_url) {

    $content = file_get_contents($feed_url);
    $x = new SimpleXmlElement($content);

    echo "<ul>";

    foreach($x->channel->item as $entry) {
        echo "<li><a href='$entry->link' title='$entry->title'>" . $entry->title . "</a></li>";
    }
    echo "</ul>";
}
?>

---

$x = new SimpleXmlElement($content);

---

echo "<ul>";

foreach($x->channel->item as $entry) {
    echo "<li><a href='$entry->link' title='$entry->title'>" . $entry->title . "</a></li>";
}
echo "</ul>";

XML to Array in PHP

/*
    Working with XML. Usage: 
    $xml=xml2ary(file_get_contents('1.xml'));
    $link=&$xml['ddd']['_c'];
    $link['twomore']=$link['onemore'];
    // ins2ary(); // dot not insert a link, and arrays with links inside!
    echo ary2xml($xml);
*/

// XML to Array
function xml2ary(&$string) {
    $parser = xml_parser_create();
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
    xml_parse_into_struct($parser, $string, $vals, $index);
    xml_parser_free($parser);

    $mnary=array();
    $ary=&$mnary;
    foreach ($vals as $r) {
        $t=$r['tag'];
        if ($r['type']=='open') {
            if (isset($ary[$t])) {
                if (isset($ary[$t][0])) $ary[$t][]=array(); else $ary[$t]=array($ary[$t], array());
                $cv=&$ary[$t][count($ary[$t])-1];
            } else $cv=&$ary[$t];
            if (isset($r['attributes'])) {foreach ($r['attributes'] as $k=>$v) $cv['_a'][$k]=$v;}
            $cv['_c']=array();
            $cv['_c']['_p']=&$ary;
            $ary=&$cv['_c'];

        } elseif ($r['type']=='complete') {
            if (isset($ary[$t])) { // same as open
                if (isset($ary[$t][0])) $ary[$t][]=array(); else $ary[$t]=array($ary[$t], array());
                $cv=&$ary[$t][count($ary[$t])-1];
            } else $cv=&$ary[$t];
            if (isset($r['attributes'])) {foreach ($r['attributes'] as $k=>$v) $cv['_a'][$k]=$v;}
            $cv['_v']=(isset($r['value']) ? $r['value'] : '');

        } elseif ($r['type']=='close') {
            $ary=&$ary['_p'];
        }
    }    

    _del_p($mnary);
    return $mnary;
}

// _Internal: Remove recursion in result array
function _del_p(&$ary) {
    foreach ($ary as $k=>$v) {
        if ($k==='_p') unset($ary[$k]);
        elseif (is_array($ary[$k])) _del_p($ary[$k]);
    }
}

// Array to XML
function ary2xml($cary, $d=0, $forcetag='') {
    $res=array();
    foreach ($cary as $tag=>$r) {
        if (isset($r[0])) {
            $res[]=ary2xml($r, $d, $tag);
        } else {
            if ($forcetag) $tag=$forcetag;
            $sp=str_repeat("\t", $d);
            $res[]="$sp<$tag";
            if (isset($r['_a'])) {foreach ($r['_a'] as $at=>$av) $res[]=" $at=\"$av\"";}
            $res[]=">".((isset($r['_c'])) ? "\n" : '');
            if (isset($r['_c'])) $res[]=ary2xml($r['_c'], $d+1);
            elseif (isset($r['_v'])) $res[]=$r['_v'];
            $res[]=(isset($r['_c']) ? $sp : '')."</$tag>\n";
        }

    }
    return implode('', $res);
}

// Insert element into array
function ins2ary(&$ary, $element, $pos) {
    $ar1=array_slice($ary, 0, $pos); $ar1[]=$element;
    $ary=array_merge($ar1, array_slice($ary, $pos));
}