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phparray-map
shorif2000
shorif2000

Reputation: 2654

Array map use variable to identify column to return

I am trying to use array map dynamically, the column in the array may change so I don't want to specify it using string but want to use a variable to specify it, it does not work. Tried all the following combinations, it returns null.

$column = 'MANAGER_GROUP';
array_map(function($el){ return $el['"'.$column.'"']; }, $dbData);
array_map(function($el){ return $el["$column"]; }, $dbData);
array_map(function($el){ return $el[$column]; }, $dbData);

//this works though
array_map(function($el){ return $el["MANGER_GROUP"]; }, $dbData);

Upvotes: 3

Views: 613

Answers (1)

Tadas Paplauskas
Tadas Paplauskas

Reputation: 1903

Anonymous function has it's own scope, it does not have access to parent scope automatically. You have to explicitly specify a variable to be passed to anonymous function context.

$column = 'MANAGER_GROUP';
array_map(function($el) use ($column) { 
    return $el[$column];
}, $dbData);

Upvotes: 6

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