Modify array keys

Question

I have an array of std objects.

I wish to rename them.

How do I do it?

Eg

Array(  
    [0] stdClass  
        key => values  
    [1] stdClass  
        key => values  
    [2] stdClass  
        key => values  
)

How to rename the values 0, 1, 2 to something else?

--- Updated below ---

I'm using this now

foreach ($arr as $value) {
    $new_arr[] = array('my_key' => $value);
}

But at the expense of an additional array dimension.

Was trying to change something like this

Array(
    [0] stdClass
        tid => 10
        name => Category
    [1] stdClass
        tid => 11
        name => Product
)

to...

Array(
    [10] stdClass
        tid => 10
        name => Category
    [11] stdClass
        tid => 11
        name => Product
)

Can you rephrase your question? Do you want to change the keys to something else? Can you show an actual var_dump of a real array and an example of what you would like to change it to? — Alex Vidal
– Alex Vidal, Commented Jan 5, 2011 at 3:11

ajreal · Accepted Answer · 2011-01-05 07:30:27Z

2

$new_arr = array();
foreach ($array as $val)
{
  $new_arr[(int)$val->tid] = $val;
}

edited Jan 5, 2011 at 7:30

answered Jan 5, 2011 at 3:50

ajreal

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2 Comments

RobertPitt Over a year ago

Hmm, what has this got to do with it, he remapping his array index thats all, nothing to do with casting.

ajreal Over a year ago

that's before the second upate

BenMorel · Accepted Answer · 2014-06-16 11:49:02Z

1

Something like this maybe

$mapping = array(
     0 => "object_0",
     1 => "object_1",
     2 => "object_2",
     3 => "object_3",
);

foreach($my_array as $key => $value)
{
     //Check to see if there's a key, else use integer
     $_key = isset($mapping[$key]) ? $mapping[$key] : $key;

     //Remove the old one | 0,1,2 ... $value already in scope, and not referenced.
     unset($my_array[$key]);

     //And key 0 to index object_0 etc
     $my_array[$_key] = $value;
}

This will loop every element in your array and check it against the mappings array, if the key exists it will add the value to the correct index and remove the old integer based index.

Also this should be ok with scope and references,

edited Jun 16, 2014 at 11:49

BenMorel

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answered Jan 5, 2011 at 7:20

RobertPitt

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