Coding PHP extensions

[suvarna271]

I am following "Extending and Embedding PHP" by Sara Golemon. While explaining the concepts she has used several small snippets of code as such

 
void describe_zval(zval *foo)
{
    if (Z_TYPE_P(foo) == IS_NULL) {
        php_printf("The variable is NULL");
    } else {
        php_printf("The variable is of type %d",
                            Z_TYPE_P(foo));
    }
}
 
 

I tried writing the code in a .c file. But i am at loss regarding the dependencies required to compile the code.
Please guide.