Regression in XmlPropertyTask RC3 -> RC4

[fooman]

Describe the bug
A previously working phing build file no longer works on RC4/php8.2.

Steps To Reproduce
Try to read an xml file via

<xmlproperty file="report.xml" required="true" collapseAttributes="true"/>

Example file

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite name="Magento\FunctionalTestingFramework.functional" tests="2" assertions="0" errors="2" failures="0" skipped="0" time="0.000000">
    <testcase file="/var/www/dev/tests/acceptance/tests/functional/Magento/_generated/AdminOrderPrintActionsTestCest.php" name="AdminOrderPrintActionsTest" class="Magento\AcceptanceTest\Backend\AdminOrderPrintActionsTestCest" feature="admin order print actions test" assertions="0" time="0.000000"/>
    <testcase file="/var/www/dev/tests/acceptance/tests/functional/Magento/_generated/StorefrontGuestCheckoutTestCest.php" name="StorefrontGuestCheckoutTest" class="Magento\AcceptanceTest\Backend\StorefrontGuestCheckoutTestCest" feature="storefront guest checkout test" assertions="0" time="0.000000"/>
  </testsuite>
</testsuites>

Expected behavior
Xml file is read (this works with RC3 / php8.1)

Screenshots / terminal output

BUILD FAILED
count(): Argument #1 ($value) must be of type Countable|array, string given

Total time: 0.0334 seconds

Additional context
I believe the issue is this line here
https://github.com/phingofficial/phing/blob/3.0.0-RC4/src/Phing/Io/XmlFileParser.php#L94
as implode returns a string https://www.php.net/manual/en/function.implode.php
maybe strlen could be an option?

The change was introduced via this commit.

[fooman]

#1691 seems to address this.