CODEWITHSUNDEEP
phparrays
Samir Maksimov
Samir Maksimov

Reputation: 105

PHP array_search with associative array

I've an array's

first one: 

    [0] => 0289 [1] => 0146 [2] => 5519 [3] => 5308 [4] => 5503 [5] => 5357

second one(associative):

    [78941] => 5308 [15749] => 5519 [1469156] => 5308 [78971413] => 5357 [418979] => 0289

Need to find keys in second one by first one value. One by one. I did some loop:

for($i=0;$i<=5;$i++){
$keys=array_search($first_array[$i],$second_array);   
file_put_contents('check.txt',$keys,FILE_APPEND);
}

But get nothing. What I'am doing wrong?

Addition

The second array is more large than I show here, approximately 10000 values.

I must insert 5 values per file and these values must be uniq, to avoid overlap.

It will be looks like :

  $t=0;
 for($i=0;$i<=count($second_array);$i++){

$keys=array_search($first_array[$t],$second_array);   
file_put_contents('check.txt',$keys,FILE_APPEND);
 $t++
 if ($t==5){$t=0}

}

Hope it would help.

Upvotes: 2

Views: 2429

Answers (4)

Samira Khorshidi
Samira Khorshidi

Reputation: 942

array_search() returns the key if it finds the value, and returns false if not found, so if

you want keys, this code is what you want:

$one=array("0"=>"0146","1"=>"5519","2"=>"5308","3"=>"5503","4"=>"5357");
$two=array("78941"=>"5308","15749"=>"5519","1469156"=>"5308","78971413"=>"5357","418979"=>"5357");
$result=array();

for($i=0;$i<=5;$i++){
if(array_search($one[$i],$two))
$result[]=array_search($one[$i],$two);
}
print_r($result);//OR file_put_contents('check.txt',$result,FILE_APPEND)

Upvotes: 0

nurakantech
nurakantech

Reputation: 502

You can do it much simple way using foreach loop

<?php
      $i = 0;
      foreach($array2 as $key => $value):
         if($array1[$i] == $value) {
           //$key is the required key, manage your stuffs here.
         }
         $i++;
      endforeach;
 ?>

Upvotes: 1

Brad Bird
Brad Bird

Reputation: 737

foreach($first_array as $first_key => $first_value){
    foreach($second_array as $second_key => $second_value){
        if($first_value == $second_value){
            file_put_contents($file_name, $second_key . "\n", FILE_APPEND);
        }
    }
}

Upvotes: 0

Alma Do
Alma Do

Reputation: 37365

If you need only keys, so just filter them:

$keys = array_intersect($first, array_keys($second));

However, if you want to get both values and keys, then it'll be like:

$keysAndValues = array_intersect_key($second, array_flip($first));

Upvotes: 4

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