Forums / Developer / how to know if a variable is set?
marc marc
Thursday 16 October 2008 8:21:28 am
Hello everybody,
i would like to show a textfield and its title in an article only if this field is set, that means if theres is no text in the textfield, the title won't appear. i know in PHP there is the 'isset' condition that return true if the variable is not empty, but i didnt find anything in ezpublish that is similar.
thank you for your help.
justin kazadi
Thursday 16 October 2008 8:40:51 am
Hi,if you want to know if an attribute named title for exemple is set you can use this:
{if $node.data_map.title.has_content} {do same thing} {/if}
The theory is when we know everything and nothing works. The practice is when everything works and nobody knows why. If the practice and theory are met, nothing works and we do not know why. Albert Einstein
Piotrek Karaś
Thursday 16 October 2008 10:31:35 am
Justin, If you explicitly refer in a conditional statement to an inexistent variable, a warning or a notice will be thrown. This is exactly why isset-like functions exist, and eZ has those as well: http://ez.no/doc/ez_publish/technical_manual/4_0/reference/template_operators/variable_and_type_handling/is_set http://ez.no/doc/ez_publish/technical_manual/4_0/reference/template_operators/variable_and_type_handling http://ez.no/doc/ez_publish/technical_manual/4_0/reference/template_operators/data_and_information_extraction/ezhttp_hasvariable http://ez.no/doc/ez_publish/technical_manual/4_0/reference/template_operators/data_and_information_extraction/ezini_hasvariable ... Hope this helps, Cheers,Piotrek
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Friday 17 October 2008 1:27:40 am
thank you for your help, i try right now