Padding a multidimensional array with array_pad?

Question

$summary=$query->result_array();    //where the original array is created 
print_r($summary);                     //dump contents

Produces this:

Array ( [0] => Array ( [RecordID] => 2 [UserID] => 3 [BookID] => 1 [Title] => FirstBook ) [1] => Array ( [RecordID] => 3 [UserID] => 3 [BookID] => 2 [Title] => Sequel ) )

I would now like to pad the multi dimensional array with a price element so as to create the results of

Array ( [0] => Array ( [RecordID] => 2 [UserID] => 3 [BookID] => 1 [Title] => FirstBook [Price] => 99 ) [1] => Array ( [RecordID] => 3 [UserID] => 3 [BookID] => 2 [Title] => Sequel  [Price] => 99) )

The only way I can think of doing this is to break the multidimensional array into one-dimensional arrays, modify them, and then re-assemble them. Doesn't sound terribly efficient though. Any suggestions?

Madbreaks · Accepted Answer · 2013-10-15 22:37:21Z

1

You can update the internal arrays by reference, note the & here:

foreach($summary as &$details){
    $details['Price'] = $price;  // wherever $price comes from...
}

answered Oct 15, 2013 at 22:37

Madbreaks

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2 Comments

Maxcot Over a year ago

Quick question: What is the technical name of that ampersand that you highlighted? "note the & here". It's not an operator is it? I'm trying to read up about it in PHP documentation.

Iłya Bursov Over a year ago

@Maxcot read assigment and references

Iłya Bursov · Accepted Answer · 2013-10-15 22:36:18Z

0

try to use:

foreach ($summary as $idx => &$arrValue)
    $arrValue['Price'] = ###;

answered Oct 15, 2013 at 22:36

Iłya Bursov

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Comments

phil-lavin · Accepted Answer · 2013-10-15 22:37:56Z

0

If you're fixed on your dimensions, iterate with a reference and modify $summary in place...

<?php
foreach ($summary as &item) {
   $item['price'] = 99;
}

If you have particular objections/issues with references:

<?php
foreach ($summary as $key=>item) {
   $summary[$key]['price'] = 99;
}

answered Oct 15, 2013 at 22:37

phil-lavin

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