aliroXML.php

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<?php

class aliroXMLException extends Exception {

    public function __construct ($message) {
        parent::__construct($message, 0);
    }

}

class aliroXML {
    protected $xmlobject = null;
    protected $maintag = '';
    protected $valid = true;

    public function __get ($property) {
        if (is_null($this->xmlobject) OR is_null($result = $this->xmlobject->$property)) return null;
        return $result;
    }

    public function baseAttribute ($attribute) {
        return (string) $this->xmlobject[$attribute];
    }

    public function loadFile ($xmlfile, $attribs=0) {
        if (!file_exists($xmlfile)) throw new aliroXMLException(sprintf(T_('Requested XML file %s does not exist'), $xmlfile));
        if (!is_readable($xmlfile)) throw new aliroXMLException(sprintf(T_('Requested XML file %s is not readable'), $xmlfile));
        $string = file_get_contents($xmlfile);
        return $this->loadString($string, $attribs);
    }

    public function loadString ($xmlstring, $attribs=0) {
        $ampencode = '/(&(?!(#[0-9]{1,5};))(?!([0-9a-zA-Z]{1,10};)))/';
        $xmlstring = preg_replace($ampencode, '&amp;', $xmlstring);
        $tag = preg_match('/(<(?!\?)(?!\!)[^> ]*)/', $xmlstring, $matches);
        if ($tag) $this->maintag = substr($matches[0],1);
        else throw new aliroXMLException(T_('XML Handler cannot find main tag'));
        $filename = ('install' == $this->maintag) ? 'josinstall' : $this->maintag;
        $filename = _ALIRO_ABSOLUTE_PATH.'/xml/'.$filename.'.dtd';
        if (!file_exists($filename)) throw new aliroXMLException(T_('XML Handler - no matching DTD'));
        $href = 'file://'.$filename;
        $xmlstring = '<?xml version="1.0" encoding="utf-8"?>'
        ."<!DOCTYPE $this->maintag SYSTEM \"$href\">"
        .strstr($xmlstring, $matches[0]);
        set_error_handler(array($this, 'xmlerror'));
        $this->xmlobject = simplexml_load_string($xmlstring, null, LIBXML_DTDVALID);
        restore_error_handler();
        return $this->valid;
    }

    public function xmlerror ($errno, $errmsg) {
        $this->valid = false;
        $split = explode('parser error :', $errmsg);
        if (isset($split[1])) $errordetail = T_(' parser error: ').$split[1];
        else $errordetail = T_(' non-parser XML error').$errmsg;
        throw new aliroXMLException(T_('An XML processing error occurred in class aliroXML'.$errordetail));
    }

    public function getXML ($properties) {
        $ps = explode('->', $properties);
        $obj = $this->xmlobject;
        foreach ($ps as $p) {
            if (is_null($obj)) return null;
            if ('[' == $p[0] AND ']' == substr($p,-1)) return (string)$obj[substr($p,1,-1)];
            if (is_null($obj = $obj->$p)) return null;
        }
        return $obj;
    }

    public static function attribArray ($xmlobject) {
        $result = array();
        foreach ($xmlobject->attributes() as $key=>$value) $result[$key] = (string) $value;
        return $result;
    }

    public static function elementArray ($xmlobject) {
        $result = array();
        foreach ($xmlobject as $element) $result[] = (string) $element;
        return $result;
    }
    
}

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