Can't access elements of a php array

Question

I am really tearing my hair out and I wondered if anyone can see what I am doing wrong. I have a form which fills an array "Rehearsals". So far so good. If after I press submit, I recover the values of rehearsal, I can get a print_r of the variable, but the variable itself has no contents so:

$rhearsal = $_POST['rehearsal'];
foreach($rhearsal as $row) {
    print_r($row);
    echo "<br>plan:" . $row->plan . "<br><br>";
}

Gives the output:

Array ( 
    [Name] => A***** M***** 
    [Rehearsal_no] => 1 
    [Rehearsal] => Spring15-150106-1900 
    [plan] => Yes 
    [actual] => Yes 
) 
plan:

In other words, the variable exists in $row when I print it using print_r, but when I try to access it with $row->plan it has a null value.

I have done this lots of times before with variables, but not with input forms. If it is any help, the input form is of the form: <input type='hidden' name='rehearsal[$counter][Name]' value='$usern'>where $counter is an incrementing counter.

Anyone got any ideas - I have wasted a day trying to figure this out - typing and retyping in different ways. Thanks :)

You must not be using: error_reporting(E_ALL); ini_set('display_errors', '1'); — AbraCadaver
– AbraCadaver, Commented Jan 30, 2015 at 15:38

Albzi · Accepted Answer · 2015-01-30 14:46:21Z

4

Change your code to this:

$rhearsal = $_POST['rehearsal'];
foreach($rhearsal as $row) {
    print_r($row);
    echo "<br>plan:" . $row['plan'] . "<br><br>";
}

More importantly, this bit:

$row['plan'];

As $row is an array, you grab it this way.

Objects are grabbed by using ->.

answered Jan 30, 2015 at 14:46

Albzi

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2 Comments

Mishutka Over a year ago

Brilliant - thanks. Just goes to show it pays to ask. I am still not sure what the difference between an array and an object is, but I will do some further research. :)

Albzi Over a year ago

@Mishutka if this answer has helped you can you please press the tick to the left of the answer box to mark it as answered!

axiac · Accepted Answer · 2015-01-30 14:51:15Z

0

If you prefer to access the values in $row using the object notation then you can just convert $row to an object:

$rhearsal = $_POST['rehearsal'];
foreach($rhearsal as $row) {
    print_r($row);           // here $row is an array()
    $row = (object)$row;
    print_r($row);           // and now it's an object (stdClass)
    echo "<br>plan:" . $row->plan . "<br><br>";        // this works as expected
}

answered Jan 30, 2015 at 14:51

axiac

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