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<?php $data = array('foo' => 'bar', 'zoo' => array(0,1,2,3,4,5,6)); /** * Array2XML: A class to convert array in PHP to XML * It also takes into account attributes names unlike SimpleXML in PHP * It returns the XML in form of DOMDocument class for further manipulation. * It throws exception if the tag name or attribute name has illegal chars. * * Author : Lalit Patel * Website: http://www.lalit.org/lab/convert-php-array-to-xml-with-attributes * License: Apache License 2.0 * http://www.apache.org/licenses/LICENSE-2.0 * Version: 0.1 (10 July 2011) * Version: 0.2 (16 August 2011) * - replaced htmlentities() with htmlspecialchars() (Thanks to Liel Dulev) * - fixed a edge case where root node has a false/null/0 value. (Thanks to Liel Dulev) * Version: 0.3 (22 August 2011) * - fixed tag sanitize regex which didn't allow tagnames with single character. * Version: 0.4 (18 September 2011) * - Added support for CDATA section using @cdata instead of @value. * Version: 0.5 (07 December 2011) * - Changed logic to check numeric array indices not starting from 0. * Version: 0.6 (04 March 2012) * - Code now doesn't @cdata to be placed in an empty array * Version: 0.7 (24 March 2012) * - Reverted to version 0.5 * Version: 0.8 (02 May 2012) * - Removed htmlspecialchars() before adding to text node or attributes. * * Usage: * $xml = Array2XML::createXML('root_node_name', $php_array); * echo $xml->saveXML(); */ class Array2XML { private static $xml = null; private static $encoding = 'UTF-8'; /** * Initialize the root XML node [optional] * @param $version * @param $encoding * @param $format_output */ public static function init($version = '1.0', $encoding = 'UTF-8', $format_output = true) { self::$xml = new DomDocument($version, $encoding); self::$xml->formatOutput = $format_output; self::$encoding = $encoding; } /** * Convert an Array to XML * @param string $node_name - name of the root node to be converted * @param array $arr - aray to be converterd * @return DomDocument */ public static function &createXML($node_name, $arr=array()) { $xml = self::getXMLRoot(); $xml->appendChild(self::convert($node_name, $arr)); self::$xml = null; // clear the xml node in the class for 2nd time use. return $xml; } /** * Convert an Array to XML * @param string $node_name - name of the root node to be converted * @param array $arr - aray to be converterd * @return DOMNode */ private static function &convert($node_name, $arr=array()) { //print_arr($node_name); $xml = self::getXMLRoot(); $node = $xml->createElement($node_name); if(is_array($arr)){ // get the attributes first.; if(isset($arr['@attributes'])) { foreach($arr['@attributes'] as $key => $value) { if(!self::isValidTagName($key)) { throw new Exception('[Array2XML] Illegal character in attribute name. attribute: '.$key.' in node: '.$node_name); } $node->setAttribute($key, self::bool2str($value)); } unset($arr['@attributes']); //remove the key from the array once done. } // check if it has a value stored in @value, if yes store the value and return // else check if its directly stored as string if(isset($arr['@value'])) { $node->appendChild($xml->createTextNode(self::bool2str($arr['@value']))); unset($arr['@value']); //remove the key from the array once done. //return from recursion, as a note with value cannot have child nodes. return $node; } else if(isset($arr['@cdata'])) { $node->appendChild($xml->createCDATASection(self::bool2str($arr['@cdata']))); unset($arr['@cdata']); //remove the key from the array once done. //return from recursion, as a note with cdata cannot have child nodes. return $node; } } //create subnodes using recursion if(is_array($arr)){ // recurse to get the node for that key foreach($arr as $key=>$value){ if(!self::isValidTagName($key)) { throw new Exception('[Array2XML] Illegal character in tag name. tag: '.$key.' in node: '.$node_name); } if(is_array($value) && is_numeric(key($value))) { // MORE THAN ONE NODE OF ITS KIND; // if the new array is numeric index, means it is array of nodes of the same kind // it should follow the parent key name foreach($value as $k => $v) { $node->appendChild(self::convert($key, 'item')); $node->appendChild(self::convert($key, $v)); } } else { // ONLY ONE NODE OF ITS KIND $node->appendChild(self::convert($key, $value)); } unset($arr[$key]); //remove the key from the array once done. } } // after we are done with all the keys in the array (if it is one) // we check if it has any text value, if yes, append it. if(!is_array($arr)) { $node->appendChild($xml->createTextNode(self::bool2str($arr))); } return $node; } /* * Get the root XML node, if there isn't one, create it. */ private static function getXMLRoot(){ if(empty(self::$xml)) { self::init(); } return self::$xml; } /* * Get string representation of boolean value */ private static function bool2str($v){ //convert boolean to text value. $v = $v === true ? 'true' : $v; $v = $v === false ? 'false' : $v; return $v; } /* * Check if the tag name or attribute name contains illegal characters * Ref: http://www.w3.org/TR/xml/#sec-common-syn */ private static function isValidTagName($tag){ $pattern = '/^[a-z_]+[a-z0-9\:\-\.\_]*[^:]*$/i'; return preg_match($pattern, $tag, $matches) && $matches[0] == $tag; } } $xml = Array2XML::createXML('root-element-here', $data); echo $xml->saveXML(); ?>

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