How to insert a new array element in parent array in foreach

Question

I have an array $categories as follows;

Array
    (
        [0] => Array
            (
                [category_id] => 0
            )

        [1] => Array
            (
                [category_id] => 3
            )
    )

I want to apply some condition in foreach as follows;

Note: following condition is not working;

foreach ($categories as $key=> $category)
{
    if($category['category_id']===0)
    {
        $categories[$key]['category_name'] = 'NA';
    }
    else
    {
        $categories[$key]['category_name'] = 'something';
    }
}

so my expected result will become;

Array
    (
        [0] => Array
            (
                [category_id] => 0
                [category_name] => NA
            )

        [1] => Array
            (
                [category_id] => 3
                [category_id] => something
            )
    )

Possible that 0 is string you are checking with === operator which will match string with its datatype also. Check it please. And use '0' in current condition. — Yash
– Yash, Commented Mar 11, 2016 at 12:35
@MujahedAKAS, you can either use '0' with condition or use == operator. — Yash
– Yash, Commented Mar 11, 2016 at 12:37

Yash · Accepted Answer · 2016-03-11 12:44:03Z

2

In the array there is possible that 0 could be string you are checking with === operator which will match string with its datatype also.

You can check its datatype if needed using gettype($value).

For current issue try this:

/* Compare value without checking its datatype */
if($category['category_id'] == 0)  /* replace === to == */
{
    $categories[$key]['category_name'] = 'NA';
}
else
{
    $categories[$key]['category_name'] = 'something';
}

answered Mar 11, 2016 at 12:44

Yash

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7 Comments

VolkerK Over a year ago

Again: see 3v4l.org/rQBKh , no, according to the output of print_r it's not possible that the key is a string, because php converts it to an integer. If you don't believe that ...show me ;-)

Ahmed Syed Over a year ago

Yeaa @VolkerK, I still don't know, How 0 is is coming as string cuz in DB category_id's datatype is int(11).

Yash Over a year ago

@VolkerK if you declare string array such as $str_arr = array('0','1','2');. Kindly check the output. php array index first trying to treat numeric array then associative array.

VolkerK Over a year ago

Oh, no. I'm sorry. I completely misread the question...... you're comparing the value, not the key. Totally possible that you you get the value as a string, even though it's defined as an Integer in the database. mysqlnd can give you the correct datatype. But you'd have to use mysqlnd and then there was some config parameter/function call you have to make for mysqli ...forgot what it was.

Yash Over a year ago

Agree with your concept @VolkerK. Thanks for good solution anyways.

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