Custom module does not display in page

Question

I'm trying to add custom block module to homepage but it does not load my block.phtml file. Here are my files: app/etc/modules/MG_Block.xml:

<config>
    <modules>
        <MG_MyBlock>
            <active>true</active>
            <codePool>local</codePool>
        </MG_MyBlock>
    </modules>
</config>

app/code/local/MG/MyBlock/etc/config.xml:

<config>
    <modules>
        <MG_MyBlock>
            <version>0.1.0</version>
        </MG_MyBlock>
    </modules>
    <global>
        <blocks>
            <mg_myblock>
                <class>MG_MyBlock_Block</class>
            </mg_myblock>
        </blocks>
    </global>
</config>`

app/code/local/MG/MyBlock/Block/Products.php:

class MG_MyBlock_Block_Products extends Mage_Core_Block_Abstract{
    public function index(){
        return "hello world";
    }
}

app/design/frontend/rwd/default/template/mg/products.phtml:

<?php echo $this->index(); ?>

app/design/frontend/rwd/default/layout/local.xml:

<layout version="0.1.0">
    <default>
        <reference name="content"> 
            <block type="mg_myblock/products" output="toHtml" name="myblock" template="mg/products.phtml" after="-" />
        </reference>
    </default>
</layout>

When I use var_dump in _construct() function in my block it shows var_dump but it does not load template file.

Answer 1

First add "module.xml" in layout tag in "config.xml".

<config>
    <modules>
        <MG_MyBlock>
            <version>0.1.0</version>
        </MG_MyBlock>
    </modules>
    <global>
        <blocks>
            <mg_myblock>
                <class>MG_MyBlock_Block</class>
            </mg_myblock>
        </blocks>
    </global>
    <frontend>
        <routers>
            <myblock>
                <use>standard</use>
                <args>
                    <module>myblock</module>
                    <frontName>formtest</frontName>
                </args>
            </myblock>
        </routers>
        <layout>
            <updates>
                <mymodule>
                    <file>mymodule.xml</file>
                </mymodule>
            </updates>
        </layout>
    </frontend>
</config>

Then define "module.xml".

<layout version="0.1.0">
    <formtest_myblock_index>
        <reference name="content"> 
            <block type="mg_myblock/products" output="toHtml" name="myblock" template="mg/products.phtml" after="-" />
        </reference>
    </formtest_myblock_index>
</layout>

Try with this.

Answer 2

Rename the file MG_Block.xml in app/etc/modules/ to MG_MyBlock.xml