How can I access individual values in an associative array in PHP?

Question

I am pulling elements from a standard class object into an assoc array like so:

$array = $subjects;
foreach ( $array as $subject ) {

    foreach ( $subject as $prop => $val ) {
        if ( $val !== '' ) {
         echo $prop . ' = ' . $val;
         echo "<br>";
        }
    }
}

I get the result I expect from above, except what I'd like to do is echo out individual values into a table.

When I do this: echo $subject['day1']; I get this: "Cannot use object of type stdClass as array."

Where am I going wrong? Thanks in advance.

You don't have an array, you have a `stdClass`. Try http://php.net/manual/en/function.get-object-vars.php — Isaac, Dec 08 '16 at 20:29
Possible duplicate of [Cannot use object of type stdClass as array?](http://stackoverflow.com/questions/6815520/cannot-use-object-of-type-stdclass-as-array) — , Dec 08 '16 at 20:30

score 1 · Accepted Answer · edited May 23 '17 at 12:08

1

If it's using StdClass you'll need to do this:

$subject->day1

If you want to convert it to an array, have a look at this question: php stdClass to array

edited May 23 '17 at 12:08

Community

1
1

answered Dec 08 '16 at 20:30

Magd Kudama

3,229
2
21
25

This worked. $subject->day1. Is it possible to append an index like this: $subject->day.$x ? – Vegemike Dec 08 '16 at 20:40

Vladimir Despotovic · Answer 2 · 2016-12-08T20:38:31.510

0

You are trying to iterate over the $array and $array is still an object. Use this:

    $vars = get_object_vars($subjects);

to get assoc. array from the object $subjects. Then go:

foreach ($vars as $name => $value) {
    echo $name . "=" . $value;
    echo "<br>";
}

edited Dec 08 '16 at 20:38

answered Dec 08 '16 at 20:32

Vladimir Despotovic

3,200
2
30
58

1

get_object _vars gives an array of 0. – Vegemike Dec 08 '16 at 20:42
1
Then your object is not well defined. Tell me what do you get if you type this: print "
```
"; print_r($subjects); print "
```
";
– Vladimir Despotovic Dec 08 '16 at 20:43
Array ( [0] => stdClass Object ( [T_id] => 3 [id] => 27 [day11] => Maths [day12] => English [day13] => Free Period [day14] => Chemistry [day15] => Physics [day16] => IPT [day21] => Chemistry [day22] => Chemistry [day23] => Maths [day24] => English [day25] => Free Period [day26] => Physics – Vegemike Dec 08 '16 at 20:46
1

That means that $subjects is already an array, not an object. – Vladimir Despotovic Dec 08 '16 at 20:47
That's what I get. What would be an efficient way to access any individual values? That's what is messing me up. – Vegemike Dec 08 '16 at 20:47
1

Ok, use this: $vars = get_object_vars($subjects[0]); to get assoc. array from the array $subjects first element. Then go: foreach ($vars as $name => $value) { echo $name . "=" . $value; echo "
"; } – Vladimir Despotovic Dec 08 '16 at 20:49
1

when I do this: echo $subject->day11; I get expected result. I want to put all values in a table. How to loop through values? If i add an index like this: $x ='11'; echo $subject->day.$x; $x++; will not work. What I want is efficient way to get to each value. Driving me mad. – Vegemike Dec 08 '16 at 20:54
1

If you already have $subject that you can do $subject -> day11 with, then do this: foreach (get_object_vars($subject) as $day => $subject_name) { echo "day: " . $day . ", subject name: " . $subject_name; } – Vladimir Despotovic Dec 08 '16 at 20:59
1

OK i have done that and now have a clean looking array. – Vegemike Dec 08 '16 at 21:00
1

Ok, please upvote my comments and accept my answer and upvote my answer if you are satisfied with it. Thanks. – Vladimir Despotovic Dec 08 '16 at 21:01

How can I access individual values in an associative array in PHP?

2 Answers2