Question

I’m reading book about php, and here is task to print elements of array depends on their type;
So i created array $arr = array (5, 'str', 4, 'str1', -100, 10);, and then using foreach statement i tried to print elements that are integer

foreach ($arr1 as is_integer($arrelem)) 
    {
        print $arrelem;

    }

But this gives me an errorFatal error: Can't use function return value in write context in.
I’m sure there is something wrong with algorithm, but i need advice on how to understand these alhorighms

Answer 1

foreach ($arr1 as is_integer($arrelem)) is not allowed

Write it like so:

foreach ($arr1 as $arrelem) {
    if (is_integer($arrelem)) {
        print "int:" . $arrelem;
    } else if (is_string($arrelem)) {
        print "string:" . $arrelem;
    } else {
        print "other:" . $arrelem;
    }
}

If this is for debugging you can also use var_dump, which will give you the type and value of a variable.