xml_parse

(PHP 4, PHP 5, PHP 7, PHP 8)

xml_parse — Inizia il parsing di un documento XML

Descrizione

xml_parse(resource $parser, string $data, bool $is_final = false): int

xml_parse() esegue il parsing di un documento XML. Gli handler configurati per la gestione degli eventi saranno richiamati ogni volta che si renderà necessario.

Elenco dei parametri

parser: Un riferimento al parser XML da utilizzare.
data: Segmento di dati da analizzare. Un documento può essere elaborato a segmenti richiamando xml_parse() diverse volte con nuovi dati, con il parametro e_finale settato e true quando si elabora l'ultimo segmento.
is_final: Se valorizzato a true, il parametro data rappresenta l'ultimo segmento dei dati inviati al parser.

Valori restituiti

Restituisce 1 in caso di successo o 0 in caso di fallimento.

In caso di parsing non riuscito, si possono recuperare informazioni sull'errore con xml_get_error_code(), xml_error_string(), xml_get_current_line_number(), xml_get_current_column_number() e xml_get_current_byte_index().

Nota:
Gli errori nelle entità sono riportati alla fine dei dati quindi solo se is_final è impostato a true.

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User Contributed Notes 2 notes

down

neoyahuu at yahoo dot com ¶

17 years ago

Instead of passing a URL, we can pass the XML content to this class (either you

 want to use CURL, Socks or fopen to retrieve it first) and instead of using 

 array, I'm using separator '|' to identify which data to get (in order to make 

 it short to retrieve a complex XML data). Here is my class with built-in fopen 

 which you can pass URL or you can pass the content instead :



p/s : thanks to this great help page.



<?php



class xx_xml {



    // XML parser variables

    var $parser;

    var $name;

    var $attr;

    var $data  = array();

    var $stack = array();

    var $keys;

    var $path;

    

    // either you pass url atau contents. 

    // Use 'url' or 'contents' for the parameter

    var $type;



    // function with the default parameter value

    function xx_xml($url='http://www.example.com', $type='url') {

        $this->type = $type;

        $this->url  = $url;

        $this->parse();

    }

    

    // parse XML data

    function parse()

    {

        $data = '';

        $this->parser = xml_parser_create();

        xml_set_object($this->parser, $this);

        xml_set_element_handler($this->parser, 'startXML', 'endXML');

        xml_set_character_data_handler($this->parser, 'charXML');



        xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, false);



        if ($this->type == 'url') {

            // if use type = 'url' now we open the XML with fopen

            

            if (!($fp = @fopen($this->url, 'rb'))) {

                $this->error("Cannot open {$this->url}");

            }



            while (($data = fread($fp, 8192))) {

                if (!xml_parse($this->parser, $data, feof($fp))) {

                    $this->error(sprintf('XML error at line %d column %d', 

                    xml_get_current_line_number($this->parser), 

                    xml_get_current_column_number($this->parser)));

                }

            }

        } else if ($this->type == 'contents') {

            // Now we can pass the contents, maybe if you want 

            // to use CURL, SOCK or other method.

            $lines = explode("\n",$this->url);

            foreach ($lines as $val) {

                if (trim($val) == '')

                    continue;

                $data = $val . "\n";

                if (!xml_parse($this->parser, $data)) {

                    $this->error(sprintf('XML error at line %d column %d', 

                    xml_get_current_line_number($this->parser), 

                    xml_get_current_column_number($this->parser)));

                }

            }

        }

    }



    function startXML($parser, $name, $attr)    {

        $this->stack[$name] = array();

        $keys = '';

        $total = count($this->stack)-1;

        $i=0;

        foreach ($this->stack as $key => $val)    {

            if (count($this->stack) > 1) {

                if ($total == $i)

                    $keys .= $key;

                else

                    $keys .= $key . '|'; // The saparator

            }

            else

                $keys .= $key;

            $i++;

        }

        if (array_key_exists($keys, $this->data))    {

            $this->data[$keys][] = $attr;

        }    else

            $this->data[$keys] = $attr;

        $this->keys = $keys;

    }



    function endXML($parser, $name)    {

        end($this->stack);

        if (key($this->stack) == $name)

            array_pop($this->stack);

    }



    function charXML($parser, $data)    {

        if (trim($data) != '')

            $this->data[$this->keys]['data'][] = trim(str_replace("\n", '', $data));

    }



    function error($msg)    {

        echo "<div align=\"center\">

            <font color=\"red\"><b>Error: $msg</b></font>

            </div>";

        exit();

    }

}



?>



And example of retrieving XML data:

p/s: example use to retrieve weather



<?php

include_once "xx_xml.class.php";



// Im using simple curl (the original is in class) to get the contents



$pageurl = "http://xml.weather.yahoo.com/forecastrss?p=MYXX0008&u=c";

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt ($ch, CURLOPT_URL, $pageurl );

$thecontents = curl_exec ( $ch );

curl_close($ch);



// We want to pass only a ready XML content instead of URL

// But if you want to use URL , skip the curl functions above and use this 

// $xx4 = new xx_xml("url here",'url');



$xx4 = new xx_xml($thecontents,'contents'); 

// As you can see, we use saparator '|' instead of long array

$Code = $xx4->data ['rss|channel|item|yweather:condition']['code'] ;

$Celcius = $xx4->data ['rss|channel|item|yweather:condition']['temp'] ;

$Text = $xx4->data ['rss|channel|item|yweather:condition']['text'] ;

$Cityname = $xx4->data ['rss|channel|yweather:location']['city'] ;



?>



Hope this helps.

down

lz_speedy at web dot de ¶

15 years ago

Best seen xml2array function ever
<?php
function xml2array($url, $get_attributes = 1, $priority = 'tag')
{
    $contents = "";
    if (!function_exists('xml_parser_create'))
    {
        return array ();
    }
    $parser = xml_parser_create('');
    if (!($fp = @ fopen($url, 'rb')))
    {
        return array ();
    }
    while (!feof($fp))
    {
        $contents .= fread($fp, 8192);
    }
    fclose($fp);
    xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8");
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
    xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
    xml_parse_into_struct($parser, trim($contents), $xml_values);
    xml_parser_free($parser);
    if (!$xml_values)
        return; //Hmm...
    $xml_array = array ();
    $parents = array ();
    $opened_tags = array ();
    $arr = array ();
    $current = & $xml_array;
    $repeated_tag_index = array (); 
    foreach ($xml_values as $data)
    {
        unset ($attributes, $value);
        extract($data);
        $result = array ();
        $attributes_data = array ();
        if (isset ($value))
        {
            if ($priority == 'tag')
                $result = $value;
            else
                $result['value'] = $value;
        }
        if (isset ($attributes) and $get_attributes)
        {
            foreach ($attributes as $attr => $val)
            {
                if ($priority == 'tag')
                    $attributes_data[$attr] = $val;
                else
                    $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
            }
        }
        if ($type == "open")
        { 
            $parent[$level -1] = & $current;
            if (!is_array($current) or (!in_array($tag, array_keys($current))))
            {
                $current[$tag] = $result;
                if ($attributes_data)
                    $current[$tag . '_attr'] = $attributes_data;
                $repeated_tag_index[$tag . '_' . $level] = 1;
                $current = & $current[$tag];
            }
            else
            {
                if (isset ($current[$tag][0]))
                {
                    $current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;
                    $repeated_tag_index[$tag . '_' . $level]++;
                }
                else
                { 
                    $current[$tag] = array (
                        $current[$tag],
                        $result
                    ); 
                    $repeated_tag_index[$tag . '_' . $level] = 2;
                    if (isset ($current[$tag . '_attr']))
                    {
                        $current[$tag]['0_attr'] = $current[$tag . '_attr'];
                        unset ($current[$tag . '_attr']);
                    }
                }
                $last_item_index = $repeated_tag_index[$tag . '_' . $level] - 1;
                $current = & $current[$tag][$last_item_index];
            }
        }
        elseif ($type == "complete")
        {
            if (!isset ($current[$tag]))
            {
                $current[$tag] = $result;
                $repeated_tag_index[$tag . '_' . $level] = 1;
                if ($priority == 'tag' and $attributes_data)
                    $current[$tag . '_attr'] = $attributes_data;
            }
            else
            {
                if (isset ($current[$tag][0]) and is_array($current[$tag]))
                {
                    $current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;
                    if ($priority == 'tag' and $get_attributes and $attributes_data)
                    {
                        $current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;
                    }
                    $repeated_tag_index[$tag . '_' . $level]++;
                }
                else
                {
                    $current[$tag] = array (
                        $current[$tag],
                        $result
                    ); 
                    $repeated_tag_index[$tag . '_' . $level] = 1;
                    if ($priority == 'tag' and $get_attributes)
                    {
                        if (isset ($current[$tag . '_attr']))
                        { 
                            $current[$tag]['0_attr'] = $current[$tag . '_attr'];
                            unset ($current[$tag . '_attr']);
                        }
                        if ($attributes_data)
                        {
                            $current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;
                        }
                    }
                    $repeated_tag_index[$tag . '_' . $level]++; //0 and 1 index is already taken
                }
            }
        }
        elseif ($type == 'close')
        {
            $current = & $parent[$level -1];
        }
    }
    return ($xml_array);
}
?>

Returns a well formed array like the structure of the xml-document

<root>
 <child1>
  <child1child1/>
 </child1>
</root>

create an array like 
array[root][child1][child1child1]

lg

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