Checking if an Object in Array is Another Array

Question

I'm trying to access an array that I stored inside of $_SESSION. I've printed out the count and contents of $_SESSION just before the loop for good measure.

// $_SESSION info.
Length: 4
Array
(
    [loggedIn] => 1 
    [total] => 0 
    [plates] => Array ([0] => plates [1] => 14 [2] => 5) 
    [backpack] => Array ([0] => backpack [1] => 78 [2] => 1)
)

Here we can clearly see that the last two objects are in fact arrays. But, when I try the is_array method,

//PHP code
$length = count($_SESSION);
for ($i = 0; $i < $length; $i++)
{
    if(is_array($_SESSION[$i])){
        echo 'session '.$i.' is an array.<br />';
    }
    else{
        echo 'session '.$i.' is not an array.<br />';
    }
}

all of the objects return false.

session 0 is not an array.
session 1 is not an array.
session 2 is not an array.
session 3 is not an array.

The API says that is_array is supposed to find, «whether the given variable is an array». But, I guess I must be misunderstanding something here...

Your array is keyed and not indexed! Use foreach. $_SESSION[0..3] doen't exists. — Glavić
– Glavić, Commented Oct 1, 2012 at 18:23

Glavić · Accepted Answer · 2012-10-01 18:24:09Z

5

Do not use for loop. Use foreach.

foreach ($_SESSION as $key => $val) {
    if (is_array($val)) {
        echo 'session '.$key.' is an array.<br />';
    } else {
        echo 'session '.$key.' is not an array.<br />';
    }
}

answered Oct 1, 2012 at 18:24

Glavić

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Comments

Alex Kalicki · Accepted Answer · 2012-10-01 18:24:24Z

1

The problem here is that you're trying to iterate through an associative array with numeric indices instead of the appropriate keys. Try this instead:

foreach ($_SESSION as $key => $value)
{
    if(is_array($value)){
        echo 'session '.$key.' is an array.<br />';
    }
    else{
        echo 'session '.$key.' is not an array.<br />';
    }
}

answered Oct 1, 2012 at 18:24

Alex Kalicki

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Comments

Prasanth · Accepted Answer · 2012-10-01 18:24:45Z

0

Use:

foreach($_SESSION as $key=>$val){
    if(is_array($val)){
    // code here
    }
}

answered Oct 1, 2012 at 18:24

Prasanth

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