[include_once]

Description

Includes the specified file only if it has not already been included using this tag. Based on this discussion from Lasso Talk.

Requires [file_pathfromroot], available here.

Sample Usage

include_once('/path/to/file.inc');

Source Code

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define_tag(
	'once',
	-namespace='include_',
	-priority='replace',
	-description='Includes the specified file only if it has not already been included.'
);
	fail_if(
		!params->size || !params->first->isa('string'),
		-1,
		'[include_once] requires a file path as a parameter.'
	);
	
	local('path') = file_pathfromroot(params->first);		
	!var_defined('included_files') ? var('included_files' = set);		
	
	if($included_files !>> #path);
		$included_files->insert(#path);
		return(include(#path));
	/if;		
/define_tag;

Related Tags

• file_pathfromroot

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