Using PHP function in_array with array from foreach loop

Question

I am writing some values into an array from a comma separated text file like this...

$tokenFile  = "tokens.txt";
$tokenSet = file_get_contents($tokenFile);
$tokenValues = explode(',', $tokenSet);   

foreach($tokenValues as $value) {
        $tokens[] = "$value";
    };

And I get this with print_r($tokens);

Array ( [0] => token1 [1] => token2 [2] => token3 )

This is all good and exactly what I want, I think, but then if I use in_array to check for one of those values I am not getting the results I want.

if (in_array('token2', $tokens)) {
    echo "token found!";
};

If I create my $tokens array like below instead it works fine.

$tokens = array('token1', 'token2', 'token3')

And once again with print_r($tokens) I get..

Array ( [0] => token1 [1] => token2 [2] => token3 )

Both arrays appear exactly the same. What am I missing.

Update So the arrays are different

with var_dump I get the following array from the foreach loop

array(4) {
  [0]=>
  string(6) "token1"
  [1]=>
  string(8) "token2"
  [2]=>
  string(8) "token3"
  }

And I get the this from the other array.

array(4) {
  [0]=>
  string(6) "token1"
  [1]=>
  string(6) "token2"
  [2]=>
  string(6) "token3"
  }

Both Arrays are not same. One is single dimensional and other is Multidimensional. Use foreach loop. — Sunil Pachlangia
– Sunil Pachlangia, Commented Feb 23, 2015 at 11:27
do (with your array from the file)var_dump($tokens); Right click -> view source code and show us what you get there — Rizier123
– Rizier123, Commented Feb 23, 2015 at 11:29
See the difference: string(8) "token3" and string(6) "token3" — Rizier123
– Rizier123, Commented Feb 23, 2015 at 11:45
possible duplicate of Why does my PHP string comparison fail? — Rizier123
– Rizier123, Commented Feb 23, 2015 at 11:46

shukshin.ivan · Accepted Answer · 2015-02-23 11:37:42Z

1

I suppose you forgot about spaces or \n \r symbols. Try to use var_dump() instead of print_r to see the difference in strings. And don't forget to use trim() function to remove extra symbols on both ends of a string.

$tokenFile  = "tokens.txt";
$tokenSet = file_get_contents($tokenFile);
$tokenValues = explode(',', $tokenSet);   

foreach($tokenValues as $value) {
    $tokens[] = trim($value);
};
var_dump($tokens);

Another way to get values is to use regular expressions.

answered Feb 23, 2015 at 11:37

shukshin.ivan

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5 Comments

Rizier123 Over a year ago

Why do you know that there are still spaces? Did you saw the output of var_dump() from OP?

shukshin.ivan Over a year ago

Thats the only way to have the same print_r output and different in_array behaviour for strings, that doesn't contain spaces in the middle.

Rizier123 Over a year ago

Ah okay and what would be about html tags? You don't see them neither in print_r() nor in var_dump()

skribe Over a year ago

@shukshin Bingo! That was it. Works perfectly now. Thanks.

shukshin.ivan Over a year ago

Please, colleagues, don't downvote my old dummy questions @Rizier123, that's easy: he stores tokens, not html.

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