in_array() doesn't work anymore as expected if the array is created with explode()

Question

Firstly, I change my string to array. And when I try to search within that array can't search second array value. The below is my code.

//my string
$a = 'normal, admin';
//Change string to array
$arr = explode(",",$a);
// Search by array value
dd(in_array("admin", $arr)); //got false

But when I try to search something like the following, it's work.

//my string
$a = 'normal, admin';
//Change string to array
$arr = explode(",",$a);
// Search by array value
dd(in_array("normal", $arr)); //got true

Abdul Manan · Accepted Answer · 2015-05-07 10:55:27Z

4

This is because value admin has a leading space from the explode()! You can see this if you do:

var_dump($arr);

Output:

array(2) {
  [0]=>
  string(6) "normal"
  [1]=>
  string(6) " admin"
       //^   ^ See here
}

To now solve this problem, simply apply trim() combined with array_map() to every array value like this:

$arr = array_map("trim", $arr);

edited May 7, 2015 at 10:55

Abdul Manan

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answered May 7, 2015 at 10:33

Rizier123

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1 Comment

Set Kyar Wa Lar Over a year ago

$arr = array_amp("trim", $arr); is$arr = array_map("trim", $arr); ? It's work. Thanks

Narendrasingh Sisodia · Accepted Answer · 2015-05-07 10:44:14Z

2

Yes the first one will not work as you can see there's an extra space before your admin that'll won't work need to use trim and array_map function before checking the result

$a = 'normal, admin';
//Change string to array

$arr = array_map('trim',explode(",",$a));
// Search by array value
var_dump($arr);
var_dump(in_array("admin", $arr));

output:

array(2) { [0]=> string(6) "normal" [1]=> string(5) "admin" } bool(true)

edited May 7, 2015 at 10:44

answered May 7, 2015 at 10:37

Narendrasingh Sisodia

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1 Comment

Narendrasingh Sisodia Over a year ago

@SetKyarWaLar you can accept one of these answers that'll make this answer to be considered as solved.Thank You.

FatalError · Accepted Answer · 2015-05-07 10:35:55Z

1

You have an array from string like this: You string:

$a = 'normal, admin';

After use of explode there will come any array like this:

$arr = array('normal',' admin');

I mean to say you have a space in admin that's why is not searching the admin in in_array function.

Solution: Before using the explode use this function:

$newstr = str_replace(" ", "", $a);
$arr = explode(',',$newstr);

answered May 7, 2015 at 10:35

FatalError

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