Question

I have been trying to code this for a while but I am so confused with multidimensional arrays.

I have simplified it to this:

Consider I already have an array:

$myarray = ("1233","4345","3452");

I would like to push an array, onto this array (to create multidimensional array) at a certain value.

For example,
With these two variables:

$eventID = 4345
$photoID = 12

I would want to end up with:

("1233", "4345 => 12", "3452")

Answer 1

First, your array needs to be an “associative array”. You can create the array in one statement like this:

$myarray = array(
    1233 => "",
    4345 => 12,
    3452 => ""
);

Or one item at a time like this:

$myarray = array();
$myarray[1233] = "";
$myarray[4345] = 12;
$myarray[3452] = "";

This is still one dimensional array. You can go one step further and create a multi-dimensional array like this:

$myarray = array();
$myarray[1233] = "";
$myarray[4345] = array("PhotoID" => 12, "Location" => "Somewhere");
$myarray[3452] = array();
$myarray[3452]["PhotoID"] = 13;
$myarray[3452]["Location"] = "Somewhere else";

See the section on Arrays in PHP manual. It is a very frequently used data structure in PHP and I encourage you to read the section thoroughly.