Custom Lasso tag to check existence of a GET/POST parameter in Lasso script

[elizas]

Hi all,
i am sharing a tip relating to relating to filemaker.hope it would be useful.
This is a custom lasso tag which takes the name of HTTP-POST or GET parameter (submitted through form-posting for example) as argument and returns a Boolean value to indicate whether that parameter is found. It returns true if a parameter with that name is found in the set of HTTP POST/GET parameters and false if the parameter is not found.

This Lasso custom tag is like isset() function in PHP.



<?LassoScript

define_tag: 'status', -Required='param';
local: 'theVar'=(action_params);
local: 'theRecordMap'= (map);

loop: (#theVar->size);
local: 'tempElement'=(#theVar->(get: (loop_count)));
#theRecordMap->(insert: (#tempElement->First)=(#tempElement->Second));
/loop;

local: 'keys' = #theRecordMap->keys;
local: 'status' = 'false';

loop: (#keys->size);
if: (#keys->(get:loop_count)==#param);
local: 'status'='true';
/if;
/loop;

return: #status;
/define_tag;
?>


Sample Usage script
if((status: -param='age')=='true');
Variable: 'agerange' = (Action_Param:'age');
/if;

Any suggestions are welcomed.

[elizas]

This is a custom lasso tag which takes the name of HTTP-POST or GET parameter (submitted through form-posting for example) as argument and returns a Boolean value to indicate whether that parameter is found. It returns true if a parameter with that name is found in the set of HTTP POST/GET parameters and false if the parameter is not found.

This Lasso custom tag is like isset() function in PHP.



<?LassoScript

define_tag: 'status', -Required='param';
local: 'theVar'=(action_params);
local: 'theRecordMap'= (map);

loop: (#theVar->size);
local: 'tempElement'=(#theVar->(get: (loop_count)));
#theRecordMap->(insert: (#tempElement->First)=(#tempElement->Second));
/loop;

local: 'keys' = #theRecordMap->keys;
local: 'status' = 'false';

loop: (#keys->size);
if: (#keys->(get:loop_count)==#param);
local: 'status'='true';
/if;
/loop;

return: #status;
/define_tag;
?>
Eliza