Define complex type for web service

<xsd:complexType name="channel">
    <xsd:sequence>
        <xsd:element name="channelId" type="xsd:int"></xsd:element>
        <xsd:element minOccurs="0" name="channelPrice" type="xsd:int"></xsd:element>
        <xsd:element name="channelName" type="xsd:string"></xsd:element>
        <xsd:element minOccurs="0" name="channelThumbnail" type="xsd:string"></xsd:element>
    </xsd:sequence>
</xsd:complexType>
<xsd:complexType name="array_channel">
    <xsd:sequence>
    <xsd:element minOccurs="0" maxOccurs="unbounded" name="channel" type="tns:channel"/>
    </xsd:sequence>
</xsd:complexType>


$channel = array(
    'channelId'     => 1,
    'channelPrice'  => 50000,
    'channelName'   => 'HBO',
);

$channel2 = array(
    'channelId'     => 1,
    'channelPrice'  => 50000,
    'channelName'   => 'HBO',
);

$array_channel = array(
    $channel,
    $channel2
);