PHP - Filling an Array with values super quick

Question

Ok, I need an array to be outputted like this:

$sections = array(
    5 => $americanFlag,
    6 => $americanFlag,
    22 => $russianFlag,
    23 => $russianFlag,
    24 => $russianFlag,
    25 => $russianFlag,
);

Ofcourse it is much longer than this.

So, say I have an array like this:

$russian = array(22, 23, 24, 25);
$american = array(5, 6);

And arrays like this:

$americanFlag = 'http://pathtomyAmericanFlag.png';
$russianFlag = 'http://pathtomyRussianFlag.png';

How can I do this quick and easy??

goron · Accepted Answer · 2013-02-26 00:55:56Z

2

There are probably a few ways to do it. Here's a simple one:

$russian = array_fill_keys($russian, $russianFlag);
$american = array_fill_keys($american, $americanFlag);
$sections = ksort(array_merge($russian, $american));

Assumes you want them sorted by key. If not, just remove the ksort()

answered Feb 26, 2013 at 0:55

goron

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3 Comments

KingCrunch Over a year ago

Of course array_fill_keys() ... Need to remember it. btw: It seems, that the keys should be identifiers (like in a dictionary, or map), so I guess you can assume, that the order is unimportant.

Solomon Closson Over a year ago

Thanks, no need to sort it by key! Very much appreciated!

mickmackusa Over a year ago

This untested answer will mislead and confuse researchers. $sections will be true, not an array.

KingCrunch · Accepted Answer · 2013-02-26 00:52:05Z

0

$usFlags = array_combine($american, array_fill(0, count($american), $americanFlag);
$ruFlags = array_combine($russian, array_fill(0, count($russian), $russianFlag);
$sections = array_merge($usFlags, $ruFlags);

Should do it. However, I don't know, what you want to achieve, but it seems, that you want to output a flag depending on (I guess) an ID of something?

flags = array_merge(array_flip($russian), array_flip($american));
$helper = function ($id) use (flags) {
    return isset($flags[$id]) ? $flags[$id] : null;
}


echo 'http://pathtomy'. ucfirst($helper($id)) . 'Flag.png'; // returns

edited Feb 26, 2013 at 0:52

answered Feb 26, 2013 at 0:50

KingCrunch

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2 Comments

Solomon Closson Over a year ago

Is there an easier way to build the arrays that could achieve the END RESULT of what I'm looking for? And, yes, definitely want to output the image based on an id of something.

KingCrunch Over a year ago

Have a look at gorons answer. Semantically it's the same like my first solution, but it omits (in PHP) two steps (each) by using the builtin-function array_fill_keys() (which I forgot)

Casey Dwayne · Accepted Answer · 2013-02-26 00:52:42Z

0

You can use a multi-dimensional array:

array (
 american => array ( [0] => american, [1] american );
 russian => array  ( [0] => russian, [1] russian );

Is that what you're wanting?

answered Feb 26, 2013 at 0:52

Casey Dwayne

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Comments

KingCrunch · Accepted Answer · 2013-02-26 00:55:51Z

0

Something similar to this maybe.

 $countries = array($russian, $american);
   foreach($countries as $country){
     foreach($country as $flag) {
       echo $sections[$flag];
     }
}

edited Feb 26, 2013 at 0:55

KingCrunch

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answered Feb 26, 2013 at 0:53

ash

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Comments

Lloyd Banks · Accepted Answer · 2013-02-26 00:57:00Z

0

Try this

<?php

$russian = array();
$american = array();

foreach($sections as $key=>$value){
   if($value == "http://pathtomyRussianFlag.png"){
      array_push($russian, $key);
   }
   elseif($value == "http://pathtomyAmericanFlag.png"){
      array_push($american, $key);
   }
}

?>

answered Feb 26, 2013 at 0:57

Lloyd Banks

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3 Comments

KingCrunch Over a year ago

Especially some other answer already exists the use of array_push() seems oversized both from the semantic point of view (why treating the arrays as stack?) as well as the performance.

Lloyd Banks Over a year ago

@KingCrunch I chose to write everything out since it might be easier for the OP to understand. Performance will take a hit because of the if statement, but I doubt it will matter much for what he is working with

KingCrunch Over a year ago

Yes, in fact I was more concerned about the readabiltiy (array_push($foo, $bar) vs $foo[] = $bar). See php.net/array_push

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