PHP

XML SearchForAttribute Method

See more XML Examples

Demonstrates the SearchForAttribute method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSearch.xml, is this:

<root>
    <searchRoot>
        <fruit color="red">apple</fruit>
        <fruit color="green">pear</fruit>
        <veg color="orange">carrot</veg>
        <meat animal="cow">beef</meat>
        <xyz>
            <fruit color="blue">blueberry</fruit>
            <veg color="green">broccoli</veg>
        </xyz>
        <fruit color="purple">grape</fruit>
        <cheese color="yellow">cheddar</cheese>
    </searchRoot>
    <fruit color="red">strawberry</fruit>
    <fruit color="orange">peach</fruit>
</root>

Chilkat2 PHP

<?php

use Chilkat2\Xml;

$success = false;

$xml = new Xml();

try {
    $xml->LoadXmlFile('qa_data/xml/fruitSearch.xml');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Search the sub-tree rooted at "searchRoot";
$xSearchRoot = $xml->FindChild('searchRoot');
if ($xSearchRoot === null) {
    echo "searchRoot not found, searching from root.\n";
    $xSearchRoot = $xml->GetRoot();
}

// Search for all "fruit" nodes having a color attribute
// where the name of the color ends in "e";
$xBeginAfter = $xSearchRoot->GetSelf();
$xFound = $xSearchRoot->SearchForAttribute($xBeginAfter, 'fruit', 'color', '*e');
while ($xSearchRoot->LastMethodSuccess) {
    echo $xFound->Content, ': ', $xFound->GetAttrValue('color'), "\n";

    $xBeginAfter = $xFound;
    $xFound = $xSearchRoot->SearchForAttribute($xBeginAfter, 'fruit', 'color', '*e');
}

// The correct output is:
// grape: purple
// blueberry: blue

echo "--------------------------\n";

// ---------------------------------------------------------------------------------
// Now do the same, but instead use SearchForAttribute2
// which updates the internal reference of the caller instead
// of returning the found node.

$xBeginAfter = $xSearchRoot->GetSelf();
$xSearch = $xSearchRoot->GetSelf();

try {
    $xSearch->SearchForAttribute2($xBeginAfter, 'fruit', 'color', '*e');
    $success = true;
} catch (\Chilkat2\Exception $e) {
    $success = false;
}
while ($success) {
    echo $xSearch->Content, ': ', $xSearch->GetAttrValue('color'), "\n";

    // Copy the internal references so that the next search
    // begins after the found node.
    $xBeginAfter->CopyRef($xSearch);
    $xSearch->CopyRef($xSearchRoot);

    $xSearch->SearchForAttribute2($xBeginAfter, 'fruit', 'color', '*e');
}