Get index of array in foreach loop

Question

Given:

foreach ($rows as $row) {
    echo $row['id'];
    echo $row['firstname'];
    echo $row['lastname'];
}

How do I get the current index of $rows during any given iteration, without a separate count variable?

What I tried:

foreach ($rows as $key => $row) {
    echo $row['id'];
    echo $row['firstname'];
    echo $row['lastname'];
}

EDIT BELOW

But $key gives me the current index of $row, not the current index of $rows.

What I want to do is:

foreach ($rows as $row) {
    if(current_index($rows) == 0){
        // do something
    }
    echo $row['id'];
    echo $row['firstname'];
    echo $row['lastname'];
}

To my knowledge, PHP doesn't have a current_index() function or something like it.

Here's what $rows looks like:

Array
(
    [0] => Array
        (
            [id] => 1
            [firstname] => Firstname one
            [lastname] => Lastname one
        )

    [1] => Array
        (
            [id] => 2
            [firstname] => Firstname two
            [lastname] => Lastname two
        )

    [2] => Array
        (
            [id] => 3
            [firstname] => Firstname three
            [lastname] => Lastname three
        )
)

1) Have you echo'ed $key in the loop and are you sure it is not what you want? 2) Please make a little example with an array what you get now as output and what you expected to get — Rizier123
– Rizier123, Commented Oct 15, 2015 at 17:30
This seems to be unclear But this gives me the current index of $row, not the current index of $rows. — Exception
– Exception, Commented Oct 15, 2015 at 17:31
@FastTrack No, $key is the current index of $rows, which you are iterating. ((Otherwise make an example of the current output + expected output with the shown example array)) — Rizier123
– Rizier123, Commented Oct 15, 2015 at 17:45

Brandon White · Accepted Answer · 2015-10-15 17:38:27Z

2

You are referencing the array value as an array. That's why it is giving you $row['id']

You need to use $key as that is the value of your current index in the $rows array.

When you use foreach($rows as $key => $row) this is what it is practically doing:

$rows - input array to loop through
$key - key of your current location in the first dimensional array
$row - value of your current location in the first dimensional array

edited Oct 15, 2015 at 17:38

answered Oct 15, 2015 at 17:31

Brandon White

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3 Comments

Exception Over a year ago

What if array contains string keys ?

Exception Over a year ago

I this he is asking for integer keys like 1,2,3 and not like string indexes

Brandon White Over a year ago

It will still work for string indexes. It just won't be a 0, 1, 2.. etc. It would be the Associative Index.

Exception · Accepted Answer · 2015-10-15 17:37:20Z

1

Well $key will give current array key which may be string so I think this following will be possible solution

$i=0;
foreach ($rows as $key => $row) { 
echo $row['id']; 
echo $row['firstname']; 
echo $row['lastname']; 
echo $i;
$i++;
}

answered Oct 15, 2015 at 17:37

Exception

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1 Comment

FastTrack Over a year ago

As stated in my question, I'd like to accomplish this without using a separate count variable.

Machavity · Accepted Answer · 2015-10-16 22:42:30Z

0

Use associative array

$rows = array("id"=>"id","firstname"=>"firstname","lastname"=>"lastname")
foreach ($rows as $key=>$row) {
    if($key == "firstname"){ 
        // do something
    }
}

edited Oct 16, 2015 at 22:42

Machavity♦

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answered Oct 15, 2015 at 18:14

Abdul Razak

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