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 php.net/manual/en/function.get-object-vars.php — Isaac
– Isaac, Commented Dec 8, 2016 at 20:29
Possible duplicate of Cannot use object of type stdClass as array? — user2506641
– user2506641, Commented Dec 8, 2016 at 20:30

Community · Accepted Answer · 2017-05-23 12:08:47Z

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, 2017 at 12:08

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answered Dec 8, 2016 at 20:30

Magd Kudama

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1 Comment

Vegemike Over a year ago

This worked. $subject->day1. Is it possible to append an index like this: $subject->day.$x ?

The Outstanding Question Asker · Accepted Answer · 2016-12-08 20:38:31Z

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 8, 2016 at 20:38

answered Dec 8, 2016 at 20:32

The Outstanding Question Asker

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10 Comments

Vegemike Over a year ago

get_object _vars gives an array of 0.

The Outstanding Question Asker Over a year ago

Then your object is not well defined. Tell me what do you get if you type this: print "<pre>"; print_r($subjects); print "</pre>";

The Outstanding Question Asker Over a year ago

That means that $subjects is already an array, not an object.

The Outstanding Question Asker Over a year ago

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 "<br>"; }

Vegemike Over a year ago

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.

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