Radio-buttons simple code

<apex:page controller="search">

<apex:form >

<apex:selectRadio value="{!searchCategory}" >

    <apex:selectOption itemValue="Member one" itemlabel="Member"/>

    <apex:selectOption itemValue="Blog" itemlabel="Blog"/>

    <apex:selectOption itemValue="Photo" itemlabel="Photo"/>

</apex:selectRadio>

</apex:form>

</apex:page>

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public class search {

    public String searchCategory { get; set; }

    // Constructor of the class

    public search()

    {

    searchCategory = 'Member one';

    } 

   

}