PHP: “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” I am running a PHP script, and keep getting errors like:          Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10 Notice: Undefined index: my_index C:\wamp\www\mypath\index.php on line 11 Line 10 and 11 looks like this: echo "My variable value is: " . $my_variable_name; echo "My index value is: " . $my_array["my_index"]; What do these errors mean? Why do they appear all of a sudden? I used to use

Get the first element of an array I have an array: array( 4 => 'apple', 7 => 'orange', 13 => 'plum' ) I would like to get the first element of this array. Expected result: string apple One requirement: it cannot be done with passing by reference, so array_shift is not a good solution. How can I do this? Solution : array_shift(array_values($array)); Edited with suggestions from comments for other use cases etc... If modifying (in the sense of resetting array pointers) of $array is not a problem, you might use:

How to remove a particular element from an array in JavaScript? I have an array of integers, which I'm using the .push() method to add to. Is there a simple way to remove a specific element from an array? The equivalent of something like array.remove(int);. I have to use core JavaScript - no frameworks are allowed. Answer:  First, find the index of the element you want to remove: var array = [2, 5, 9]; var index = array.indexOf(5); Note: browser support for indexOf is limited; it is not supported in Internet Explorer 7 and 8.