Question

I have an array multidimensional associative array.

Array
(


[0] => Array
        (
            [username] => uname1
            [name] => fullname1
            [email] => [e-mail]

        )
[1] => Array
        (
            [username] => uname2
            [name] => fullname2
            [email] => uname2

        )
[2] => Array
        (
            [username] => uname3
            [name] => fullname3
            [email] => uname3@email

        )
[3] => Array
        (
            [username] => uname4
            [name] => fullname4
            [email] => uname4@

        )

}

It should validate email address using the regular expression.The return array should consists of an array with only valid array.The array should be

Array
(


[0] => Array
        (
            [username] => uname1
            [name] => fullname1
            [email] => [e-mail]
}

since [1,2,3] have invalid email address.

Answer 1

Each of the answers is valid, and deserve some upvotes. FWIW, I tried running each over 10000 iterations, and measured the elapsed time using microtime(true).

• @Gumbo’s solution, array_filter()/filter_var(): 0.631 sec.

• @Gordon’s solution, array_filter()/filter_var() w/anon function: 0.620 sec.

• @mck89’s solution, array_filter()/preg_match(): 0.307 sec.

• @Alexander.Plutov’s solution, foreach()/preg_match(): 0.193 sec.

edit: I re-tested with a more robust email regex.