Override Array Values with another one

Question

I like to learn how to combine two associative array which has same keys but different values like how we do in jQuery with var options = $.extend(defaults, options);

$first = array("name"=>"John","last_name"=>"McDonald","City"=>"World"); //default values
$second = array("name"=>"Michael","last_name"=>"Jackson"); //user provided

$result = combine($first,$second);

//output array("name"=>"Michael","last_name"=>"Jackson","City"=>"World");

I am looking for something built-in instead of writing a entire new function to provide this feature. Of course if you have something neat, just let me know.

Thanks...

John Flatness · Accepted Answer · 2011-07-21 20:35:49Z

35

$result = array_merge($first, $second);

As long as you're dealing with string keys, array_merge does exactly what you want. The two arrays are combined, and where the two have the same keys, the values from $second overwrite the values from $first.

answered Jul 21, 2011 at 20:35

John Flatness

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1 Comment

DarkSide Over a year ago

Yes it's good with one small drawback. Array_merge will reorder numeric keys! So, if you have numeric keys in your array (for example numeric constant values), then you can't use array_merge correctly.

Explosion Pills · Accepted Answer · 2011-07-21 20:36:13Z

5

array_merge()

answered Jul 21, 2011 at 20:36

Explosion Pills

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Comments

Henders · Accepted Answer · 2016-09-22 11:33:21Z

3

I think array_merge() or array_combine() are the functions you are searching for.

edited Sep 22, 2016 at 11:33

Henders

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answered Jul 21, 2011 at 20:37

Smokefoot

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2 Comments

Tarik Over a year ago

+1 for array_combine(). PHP has a lot of great built-in functions I fall in love with.

Jimmy Knoot Over a year ago

Why +1 for array_combine()? array_combine() is not going to do anything here if you have the array described by OP. array_combine() combines an array of keys with an array of values.

ermya · Accepted Answer · 2019-02-05 01:48:33Z

1

if you know exactly which key you want override you can simply do that like this $first['name']="jastin"; otherwise you have to use array_merge

answered Feb 5, 2019 at 1:48

ermya

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Comments

sarkiroka · Accepted Answer · 2011-07-21 20:36:35Z

0

you can iterate on second array and setting each element in first array

answered Jul 21, 2011 at 20:36

sarkiroka

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Comments

slfan · Accepted Answer · 2016-10-12 17:04:57Z

0

I think array_merge() or array_combine() are the functions you are looking for array_merge() may used to merge the two array which are further called. and the array_combine() the keys of a array with the values of a another array.

edited Oct 12, 2016 at 17:04

slfan

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answered Oct 12, 2016 at 16:43

user6908984

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Comments

Marco Panichi · Accepted Answer · 2020-02-15 16:15:44Z

0

I've never found a built-in function for this (simple) need, so I developed a custom function in order to override a $default array with an $override array:

function array_override( $default, $override )
{
    foreach( $default as $k=>$v )
    {
        if( isset( $override[$k] ) ) $default[$k] = $override[$k];
    }
    return $default;
}

As you can see, values in $default are overridden only if are set on the $override array; otherwise the $default value remain on the returned array.

answered Feb 15, 2020 at 16:15

Marco Panichi

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