array_map不提供空数组

Question

I have the below line which takes a string, explodes it to an array by ',' and then trims any whitespace for each array item.

   $essentialArray = array_map('trim', explode(',', $essential_skills));

However when $essential_skills string = "" $essentialArray will equal Array ( [0] => )

But I need it to equal Array() so that I can call empty() on on it.

Answer 1

explode return Array ( [0] => ), so you need to check your string before array_map

here is a one solution

   $exploderesult = $essential_skills ? explode(',', $essential_skills) : array();
   $essentialArray = array_map('trim', $exploderesult );