International PHP Conference 2015

XML Element Structure Example

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

Example #1 Show XML Element Structure

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

function 
startElement($parser$name$attrs)
{
    global 
$depth;

    if (!isset(
$depth[$parser])) {
        
$depth[$parser] = 0;
    }

    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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