PHP Doku:: XML Element Structure Example - example.xml-structure.html

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Beispiele

<<Beispiele

XML Tag Mapping Example>>

XML Element Structure Example

This first example displays the structure of the start elements in a document with indentation.

Beispiel #1 Show XML Element Structure

<?php
$file 
"data.xml";
$depth = array();

function 
startElement($parser$name$attrs
{
    global 
$depth;
    for (
$i 0$i $depth[$parser]; $i++) {
        echo 
"  ";
    }
    echo 
"$name\n";
    
$depth[$parser]++;
}

function 
endElement($parser$name
{
    global 
$depth;
    
$depth[$parser]--;
}

$xml_parser xml_parser_create();
xml_set_element_handler($xml_parser"startElement""endElement");
if (!(
$fp fopen($file"r"))) {
    die(
"could not open XML input");
}

while (
$data fread($fp4096)) {
    if (!
xml_parse($xml_parser$datafeof($fp))) {
        die(
sprintf("XML error: %s at line %d",
                    
xml_error_string(xml_get_error_code($xml_parser)),
                    
xml_get_current_line_number($xml_parser)));
    }
}
xml_parser_free($xml_parser);
?>


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roan at horning dot us
31.10.2009 6:07
The following example will echo back an xml file using the basic event based parser.  Currently, (at least in the version of PHP5 I'm using) it will skip The XML declaration and the Doctype declaration--they don't seem to be captured by the default handler.

<?php
echo "<pre>";

$file = "test.xml";
echo
$file."\n";
global
$inTag;

$inTag = "";
$xml_parser = xml_parser_create();
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($xml_parser, XML_OPTION_SKIP_WHITE, 1);
xml_set_processing_instruction_handler($xml_parser, "pi_handler");
xml_set_default_handler($xml_parser, "parseDEFAULT");
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "contents");

if (!(
$fp = fopen($file, "r"))) {
    if (!
xml_parse($xml_parser, $data, feof($fp))) {
       die(
sprintf("XML error: %s at line %d",
                           
xml_error_string(xml_get_error_code($xml_parser)),
                           
xml_get_current_line_number($xml_parser)));
    }
}
while (
$data = fread($fp, 4096)) {
    if (!
xml_parse($xml_parser, $data, feof($fp))) {
       die(
sprintf("XML error: %s at line %d",
                           
xml_error_string(xml_get_error_code($xml_parser)),
                           
xml_get_current_line_number($xml_parser)));
    }
}
xml_parser_free($xml_parser);

function
startElement($parser, $name, $attrs) {

    global
$inTag;
    global
$depth;
       
   
$padTag = str_repeat(str_pad(" ", 3), $depth);

    if (!(
$inTag == "")) {
        echo
"&gt;";
    }
    echo
"\n$padTag&lt;$name";
    foreach (
$attrs as $key => $value) {
        echo
"\n$padTag".str_pad(" ", 3);
        echo
" $key=\"$value\"";
    }
   
$inTag = $name;
   
$depth++;
}

function
endElement($parser, $name) {

    global
$depth;
   global
$inTag;
    global
$closeTag;
       
   
$depth--;

   if (
$closeTag == TRUE) {
       echo
"&lt/$name&gt;";
      
$inTag = "";
   } elseif (
$inTag == $name) {
       echo
" /&gt;";
      
$inTag = "";
   } else {
        
$padTag = str_repeat(str_pad(" ", 3), $depth);
       echo
"\n$padTag&lt/$name&gt;";
    } 
}
 
function
contents($parser, $data) {

    global
$closeTag;
   
   
$data = preg_replace("/^\s+/", "", $data);
   
$data = preg_replace("/\s+$/", "", $data);

    if (!(
$data == ""))  {
        echo
"&gt;$data";
       
$closeTag = TRUE;
    } else {
       
$closeTag = FALSE;
     }
}

function
parseDEFAULT($parser, $data) {
   
   
$data = preg_replace("/</", "&lt;", $data);
   
$data = preg_replace("/>/", "&gt;", $data);
    echo
$data;
}

function
pi_handler($parser, $target, $data) {

    echo
"&lt;?$target $data?&gt;\n";
}
echo
"</pre>";
?>



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