PHP Array push in loop doesn't change the array outside of the loop

Question

I've encountered the following problem:

private function getMyThemeIds($collection){
    $result = [];
    ...
      foreach ($results as $doc) {
        file_put_contents('2.txt', $doc->getUnid()); //everything is fine here

        $result[] = $doc->getUnid();

        file_put_contents('3.txt', print_r($result,true)); //again, array is just fine, barely 4000 entries
      }

    file_put_contents('4.txt', print_r($result,true)); // but here we see what was in this array right after initialization. Nothing in this case.
    return $result;
  }

I've tried different approaches - changed foreach to for, $result[] to array_push, etc with no avail. Anybody knows what the cause of this may be?

Not sure but you can use like $result = array(); for $result = []; while declaration.. — Maha Dev
– Maha Dev, Commented Oct 21, 2015 at 6:22
What is your php version? If you are below php-5.4 than change $result = []; to $result = array(); — Al Amin Chayan
– Al Amin Chayan, Commented Oct 21, 2015 at 6:24
Does $doc->getUnid(); prints proper output? It must not return empty. — sandeepsure
– sandeepsure, Commented Oct 21, 2015 at 6:27

Domain · Accepted Answer · 2015-10-21 07:02:27Z

2

You can initialize array using 'array()'.Please follow below statment to initialize array

$result = array();

After initialize $result you can append data to it. You can refer following link for array initialization- http://www.w3schools.com/php/func_array.asp

edited Oct 21, 2015 at 7:02

answered Oct 21, 2015 at 6:39

Domain

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5 Comments

Al Amin Chayan Over a year ago

Variable was initialized with $result = []; as of php-5.4

Yuri Drobkov Over a year ago

Somehow... It worked. I can swear I already tried this! Well, thanks everybody.

Domain Over a year ago

array_push($result,$doc->getUnid());

Silent_Coder Over a year ago

@Moorindal Just curious to know, what is your php version?

Yuri Drobkov Over a year ago

@Silent_Coder, 5.5.9-1ubuntu4.5 (cli) (built: Oct 29 2014 11:59:10)

Al Amin Chayan · Accepted Answer · 2015-10-21 06:33:39Z

0

Please see the file_put_contents for details. You can try this.

private function getMyThemeIds($collection){
    $result = array();
    ...
      foreach ($results as $doc) {
        file_put_contents('2.txt', $doc->getUnid()); //everything is fine here

        $result[] = $doc->getUnid();

        file_put_contents('3.txt', serialize($result)); //again, array is just fine, barely 4000 entries
      }

    file_put_contents('4.txt', serialize($result)); // but here we see what was in this array right after initialization. Nothing in this case.
    return $result;
  }

answered Oct 21, 2015 at 6:33

Al Amin Chayan

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