How do I use 1 array to get values from another?

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May 7th, 2003, 06:38 PM

Mojoman

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How do I use 1 array to get values from another?

Hello all!

PHP not-so-newbie here! I've got two arrays. One array holds numeric values that I want to correspond with the numeric position of text values in another array - i.e.:

$array1 = array(0, apples, oranges, pears, grapes, bananas, peaches);
$array2 = array(2, 4, 5);

I would like to arrive at this result:

$newarray-or-string = (oranges, grapes, bananas);

any suggestions?

tia - Greg

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May 8th, 2003, 02:58 AM

avit

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PHP Code:


		
			
<?php

$array1 = array(

  0 => 'z', 

  'apples' => 'ap',

  'oranges' => 'or',

  'pears' => 'pe', 

  'grapes' => 'gr', 

  'bananas' => 'ba', 

  'peaches' => 'pc'

);

$array2 = array(2, 4, 5);

$array1_keys  = array_keys($array1);

foreach ($array2 as $i) {

  $new_array[{$array1_keys[$i]}] = $array1[{$array1_keys[$i]}];

}

print_r($new_array);

?>

Not tested... Have a look at the array functions on php.net. There are 2 interesting ones called array_intersect and array_intersect_assoc, which might achieve what you are trying to do more directly. Not sure what your actual application is, though.

May 8th, 2003, 06:41 PM

Mojoman

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Hey, avit! Thanks for the response!

Close, but not quite! Your code returns the correct keys, but in a format that I cannot use (I just need the values):

Array
(
[Finnish] =>
[German] =>
[Italian] =>
)

I've looked at php.net - array_intersect and array_intersect_assoc do look as though they might apply. Is there any one who is familiar with these?

May 8th, 2003, 07:58 PM

avit

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Simple, change one line:

PHP Code:


		
			
// This one will be numbered 0,1,2,... sequentially:

$new_array[] = $array1[{$array1_keys[$i]}];



// This one will be numbered 2,4,5 same as $array2:

$new_array[$i] = $array1[{$array1_keys[$i]}];

May 9th, 2003, 12:56 PM

Mojoman

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I am now an avid avit fan!

Dude, you are the man, thanks!

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