fastest way to get element values from an array object in php

Question

I have something like this

Array
(
    [0] => stdClass Object
        (
            [CustomerID] => 14
            [Email] => [email protected]
            [LastName] => Blogs
            [BirthDayOfMonth] => 29
            [Gender] => 
            [Occupation] => 
            [SendSpecialOffers] => 1
            [SendReminderNotes] => 1
        )

    [1] => stdClass Object
        (
            [CustomerID] => 1460
            [Email] => [email protected]
            [LastName] => Example
            [BirthDayOfMonth] => 5
            [Gender] => F
            [Occupation] => 
            [SendSpecialOffers] => 1
            [SendReminderNotes] => 1
        )
);

I would like get Email address of each separated by commas, something like this

'joe.blogs@example', '[email protected]'

I know i could iterate it through foreach but i got a really big list, is there anyway to do it faster? thanks

Now, how can i remove the indexes based some email addresses?

I hope those email address owners don't mind you posting them here... ;) — Yoshi
– Yoshi, Commented Jul 26, 2011 at 10:36

Shakti Singh · Accepted Answer · 2011-07-26 10:38:50Z

6

You can do this with array map and a function but this will also iterate your array

echo implode(',',array_map('getEmail',$array));

function getEmail($obj)
{
  return $obj->Email;
}

answered Jul 26, 2011 at 10:38

Shakti Singh

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Comments

Pascal MARTIN · Accepted Answer · 2011-07-26 10:35:18Z

3

The simplest solution would indeed be a foreach() to iterate over all the items of your array ; adding, for each item, the email to a another resulting array.

Maybe you could replace the foreach by a call to array_walk(), but it probably wouldn't change much :

You wouldn't loop in PHP, as array_walk is coded in C (could be a bit faster than foreach -- not sure, though)
But a function would be called for each item, instead of just a couple of PHP instructions.

You'd have to benchmark, to see if there is a significant difference in your specific case -- but I personnaly would go for the foreach, without thinking much more.

answered Jul 26, 2011 at 10:35

Pascal MARTIN

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Comments

xkeshav · Accepted Answer · 2011-07-26 10:43:06Z

0

array_filter is best..see the examples on manual

answered Jul 26, 2011 at 10:43

xkeshav

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1 Comment

KingCrunch Over a year ago

array_filter() returns an array of elements, that are treated "valid" according a given callback. Can you explain, how do you want to use it to extract an object property from every array element?

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