The following is a representasion script and DBGp commands.
They're a combination of object->array.
In other combination, array->object and array->array result with the same issue.

[script]
<?php

class Test
{
public function __construct()
{
$this->a = array_fill(0, 10, 0);
}
}

$test = new Test();
1;

[DBGp]
feature_set -i 1 -n max_children -v 8
context_get -i 2
<response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="context_get" transaction_id="30047" context="0">
<property name="test" fullname="$test" address="140444000" type="object" children="1" classname="Test" numchildren="1">
<property name="a" fullname="$test->a" facet="public" address="140438300" type="array" children="1" numchildren="10">
<property name="0" fullname="$test->a[0]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="1" fullname="$test->a[1]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="2" fullname="$test->a[2]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="3" fullname="$test->a[3]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="4" fullname="$test->a[4]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="5" fullname="$test->a[5]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="6" fullname="$test->a[6]" address="140444276" type="int"><![CDATA[0]]></property>
<property name="7" fullname="$test->a[7]" address="140444276" type="int"><![CDATA[0]]></property>
</property>
</property>
</response>