Given the following PHP code $value ) $value htmlspecialchars( $value ) wrap up the fields and values as xml $output t t $value $output t $output return $output catch (Exception $e) return Problem $e getMessage() How would I retrieve an XMLOffer using this file in a similar way to how the following script uses the getHTMLOffer() function, so that the page updates every 5 seconds Could you also provide comments to help me to understand what is being done const requestURL getOffers php const requestURL2 getOffers php xml window addEventListener( load ,function () use strict var myVar setInterval(myTimer, 5000) function myTimer() getRequest(requestURL, updateTarget) ) function getRequest( url, callback ) use strict const httpRequest new XMLHttpRequest() httpRequest onreadystatechange function() var completed 4, successful 200 if (httpRequest readyState completed) if (httpRequest status successful) callback(httpRequest responseText) else alert( There was a problem with getting the offer ) httpRequest open( get , url, true) httpRequest send(null) function updateTarget( text ) use strict const parser new DOMParser() const xmlDoc parser parseFromString(text, text xml ) document getElementById( getOffers ) innerHTML text document getElementById( XMLoffers ) innerHTML xmlDoc getElementById( offers ) 0 innerHTML

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Posted on Sep 04, 2024

Given the following PHP code: ; // Start to assemble an output string with the xml head and root element $output = $xmlHeader; $output .=

Given the following PHP code:

getMessage(), 0, $e); } if (isset($_REQUEST['useXML'])) { // echo what getXMLOffer returns echo getXMLOffer($dbConn); } else { // otherwise just an html record is required // so echo whatever getHTMLOffer returns to the browser or back to the ajax script echo getHTMLOffer($dbConn); } function getHTMLOffer($dbConn) { try { // store the sql for a random special offer, the sql wraps things using concat in an html 'wrapper' $sql = "select concat('“',recordTitle,'”
 Category: ',catDesc,'
 Price: ',recordPrice,'
') as offer from nmc_special_offers inner join nmc_category on nmc_special_offers.catID = nmc_category.catID order by rand() limit 1"; // execute the query $rsOffer = $dbConn->query($sql); // get the one offer returned $offer = $rsOffer->fetchObject(); // return the offer return $offer->offer; } catch (Exception $e) { return "Problem: " . $e->getMessage(); } } function getXMLOffer($dbConn) { try { $xmlHeader = " "; // Start to assemble an output string with the xml head and root element $output = $xmlHeader; $output .= " "; $sql = "select recordTitle, catDesc, recordPrice from nmc_special_offers inner join nmc_category on nmc_special_offers.catID = nmc_category.catID order by rand() limit 1"; $rsOffer = $dbConn->query($sql); while ( $record = $rsOffer->fetchObject() ) { // start a new record element in xml and add to the output $output .= "\t "; // iterate through each record pulling out the fieldname and its value foreach ( $record as $field => $value ) { $value = htmlspecialchars( $value ); // wrap up the fields and values as xml $output .= "\t\t<$field>$value "; } $output .= "\t "; } $output .= ""; return $output; } catch (Exception $e) { return "Problem: " . $e->getMessage(); } } ?>

How would I retrieve an XMLOffer using this file in a similar way to how the following script uses the getHTMLOffer() function, so that the page updates every 5 seconds? Could you also provide comments to help me to understand what is being done: