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In this video we're going to take a look at inheritance and the three different types of directives

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we've already touched on the concept of inheritance.

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And you've most likely by now realize that as with scope in a typical programming language an engine

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X context inherits configurations from its parent contexts.

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This is generally a very straightforward top to bottom inheritance starting at the main context.

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The file itself down to that HTP context then the server context and finally any location context.

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That said Inheritance isn't always the straight forward and will vary depending on the type of directive

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being inherited from the three main directive types.

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Is this standard directive the array directive and the action directive.

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Now I won't be demonstrating the different types of directives.

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As I've previously done with small configuration changes but rather I compiled the sample configuration

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with detailed comments explaining how each directive works.

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So let's go over that first up.

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No one here we have what's called an array type directive.

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This is a directive that can be declared multiple times without overriding the previous the axis log

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being the perfect example of an array directive array directive sets inherited straight down meaning

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all child contexts of this main context will share these log file settings.

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For example the server context here.

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If I were ever a child context redeclare is this directive at all.

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So even only once the parent directive gets overridden completely.

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As would be the case here in this site to dot com server context.

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This entire context and all it's child context so these locations will have access logs completely disabled.

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Unless of course one of these child contexts declares its own access log.

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Again and so on.

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Then secondly we have this standard directive.

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This being the most common directive type and can only be declared once in a given context.

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Inheritance working exactly the same as the array directive parent to child with the child being able

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to override it with its own declaration.

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And finally the third directive type is the action directive.

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This being directives that invoke some or other break or action in the configuration for example a redirect

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via the return directive a response such as this one also via the return directive or alternatively

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a rewrite from either a rewrite or try files directive.

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Inheritance simply does not apply to action directives as they stop the normal flow of the configuration.

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That covers the three types of directives and the basics of inheritance which again is very important

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to understand.

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So be sure to download this linked configuration file for reference.