Using PHP to transform a 3D array into a 2D one

Question

My form produces a 3 dimensional array. I would like to transform this array into a 2 dimensional one.

I tried this with no success:

$_rows = array();
foreach ($_contacts as $name => $_arr) {
   foreach ($_arr as $key => $val) {
        $_rows[] = array ($name => $val);
   }
}

Data Source:

[_contacts] => Array
    (

    [name] => Array
            (
                [0] => foo
                [1] => bar
            )

    [phone] => Array
            (
                [0] => 012345
                [1] => 098765
            )

    [email] => Array
            (
                [0] => mail.com
                [1] => yahoo.com
            )
    )

Desired output:

 Array
    (
        [0] => Array
            (
                [name] => foo
                [phone] => 012345
                [email] => mail.com
            )

        [1] => Array
            (
                [name] => bar
                [phone] => 098765
                [email] => yahoo.com
            )
    )

Any thoughts were I went wrong?

zavg · Accepted Answer · 2015-01-30 14:12:06Z

2

$_rows = array();     
foreach ($_contacts as $name => $_arr) {          
   foreach ($_arr as $key => $val) {            
        $_rows[$key][$name] = $val;
   }
}

answered Jan 30, 2015 at 14:12

zavg

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3 Comments

Gus Over a year ago

One more thing please. As I can not create an array like this (empty)? array ( [name] => [phone] => [email]=> )? thanks

zavg Over a year ago

You can use something like array('name' => null, 'phone' => null, 'email' => null) or array('name' => '', 'phone' => '', 'email' => '')

Gus Over a year ago

I'd like to skip to create 2nd level array if the 3d level is empty. [_contacts] => Array ( [name] => Array ( [0] => foo [1] => ) [phone] => Array ( [0] => 012345 [1] => ) [email] => Array ( [0] => mail.com [1] => ) )

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