Does a PHP array need to be declared before use?

Question

While writing a recent application I accidentally started filling an array before I had declared it.

error_reporting ( E_ALL);  
$array[\'value\'] = \'Test          


        

Answer 1

To expand on that, no you do not "have" to, but it can be beneficial to.

Also if you have E_NOTICES turned OFF then you will not see errors from an non uninitialized variable. On production you should turn it off, but on development you should turn it ON. It'll allow you to find problems that you might not see.