xml_parse

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

xml_parse — Start parsing an XML document

Description

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

xml_parse() parses an XML document. The handlers for the configured events are called as many times as necessary.

Parameters

parser: A reference to the XML parser to use.
data: Chunk of data to parse. A document may be parsed piece-wise by calling xml_parse() several times with new data, as long as the is_final parameter is set and true when the last data is parsed.
is_final: If set and true, data is the last piece of data sent in this parse.

Return Values

Returns 1 on success or 0 on failure.

For unsuccessful parses, error information can be retrieved with xml_get_error_code(), xml_error_string(), xml_get_current_line_number(), xml_get_current_column_number() and xml_get_current_byte_index().

Note:
Some errors (such as entity errors) are reported at the end of the data, thus only if is_final is set and true.

Changelog

Version	Description
8.0.0	`parser` expects an XMLParser instance now; previously, a valid `xml` resource was expected.

Examples

Example #1 Chunked parsing of large XML documents

This example shows how large XML documents can be read and parsed in chunks, so that it not necessary to keep the whole document in memory. Error handling is omitted for brevity.

<?php
$stream = fopen('large.xml', 'r');
$parser = xml_parser_create();
// set up the handlers here
while (($data = fread($stream, 16384))) {
    xml_parse($parser, $data); // parse the current chunk
}
xml_parse($parser, '', true); // finalize parsing
xml_parser_free($parser);
fclose($stream);

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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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