PHP foreach stuck at values in first key

Question

I have a multidimensionel array of different departments, and a want to loop through it using a foreach loop, but for some reason, the foreach loop grabs the values under the first key through every iteration.

The array looks like this:

$departmentArray = Array ( [0] => Array ( [dpt_id] => 5 [dpt_name] => Administration [dpt_employees] => Array ( [0] => Array ( [started] => 2000-06-01 [stopped] => 9999-99-99 [empl_id] => 21 ) [1] => Array ( [started] => 2000-06-01 [stopped] => 2010-01-01 [empl_id] => 23 ) ) ) [1] => Array ( [dpt_id] => 6 [dpt_name] => Warehouse [dpt_employees] => Array ( [0] => Array ( [started] => 2000-10-01 [stopped] => 2012-01-01 [empl_id] => 30 ) [1] => Array ( [started] => 2007-10-17 [stopped] => 9999-99-99 [empl_id] => 197 ) ) ) )

And the foreach loop looks like this:

foreach($departmentArray as $key => $value) { print_r($key); print_r($value['dpt_name']); }

And this prints:

0 Administration 1 Administration.

Does anyone know, why the loop does not move forward in the array and grab the value (Warehouse) under key/index 1 during its second iteration?

No, this code would not print that. If your own code prints it, you are doing something different. Possibly iterating by reference and changing the values? — Jon
– Jon, Commented Sep 18, 2012 at 13:45
Thank you for answering. You are right, I am iterating by reference earlier in the code, where I use the same name, I will look into it now. — acrmuui
– acrmuui, Commented Sep 18, 2012 at 14:03

deceze · Accepted Answer · 2012-09-18 13:50:05Z

Total stab into the dark:

You have used $value in a foreach loop before as reference, like so:

foreach ($foo as &$value) { ... } foreach ($departmentArray as $key => $value) { ... }

This is a well known side-effect of references. unset($value) after the first loop.

Thank you for your stab in the dark, I think you are right, as I am iterating by reference earlier i the code. Should i unset() the $value in the first loop inside the curly brackets?

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