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//You can use the unset() function to remove a specific key from a multidimensional array.
$array = array(
array("name" => "John", "age" => 25),
array("name" => "Mary", "age" => 30),
array("name" => "Mike", "age" => 35)
);
unset($array[1]["age"]);
/*
This code will remove the "age" key from the second element of the array
The final array will be:
Array
(
[0] => Array
(
[name] => John
[age] => 25
)
[1] => Array
(
[name] => Mary
)
[2] => Array
(
[name] => Mike
[age] => 35
)
)
*/