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")
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.
In PHP arrays works like that:
$a = array("1233", "4345", "3452");
In the above example, the values, "1233", "4345" and "3452" they have each own an index number. So if you run that code:
$a = array("1233", "4345", "3452");
echo "<pre>";
print_r($a);
echo "</pre>";
you will get that result:
Array
(
[0] => 1233
[1] => 4345
[2] => 3452
)
In that case you can't assign an array on "4345" but on "[1]". So, with that in mind if you have another one array like that :
$b = array("321", "654", "987");
and you like to assign it into position "[1]" then you have to do something like that:
$a = array("1233", "4345", "3452");
$b = array("321", "654", "987");
$a[1] = $b;
TAKE CARE
The above code will replace your value "4345" with the content of the array $b. Now let's try to print out your array:
$a = array("1233", "4345", "3452");
$b = array("321", "654", "987");
$a[1] = $b;
echo "<pre>";
print_r($a);
echo "</pre>";
The result will be that now:
Array
(
[0] => 1233
[1] => Array
(
[0] => 321
[1] => 654
[2] => 987
)
[2] => 3452
)
Finaly, if you like to keep both the values "4345" from the array $a and assign an array to that same position into the array $a you have to consider what you like to do with the value "4345"
Some ideas are here:
$a = array("1233", "4345", "3452");
$b = array("321", "654", "987");
$b[] = $a[1];
$a[1] = $b;
echo "<pre>";
print_r($a);
echo "</pre>";
The above code has that result:
Array
(
[0] => 1233
[1] => Array
(
[0] => 321
[1] => 654
[2] => 987
[3] => 4345
)
[2] => 3452
)
Or you can try that:
$a = array("1233", "4345", "3452");
$b = array("321", "654", "987");
$c = array();
$c[] = $a[1];
$c[] = $b;
$a[1] = $c;
echo "<pre>";
print_r($a);
echo "</pre>";
The above code will have the following result
Array
(
[0] => 1233
[1] => Array
(
[0] => 4345
[1] => Array
(
[0] => 321
[1] => 654
[2] => 987
)
)
[2] => 3452
)
It looks like you want to create an associative array from an existing array. You can try this:
$assoc_array = array_combine($myarray, array_fill(0, count($myarray), null));
$assoc_array['4345'] = 12;
$assoc_array will be filled with null values for all other eventIDs.
This code will produce what you want:
$myarray = array("1233","4345","3452");
print_r($myarray);
$eventID = 4345;
$photoID = 12;
if( in_array( $eventID, $myarray) )
{
array_diff( $myarray, array($eventID) );
$myarray[ $eventID] = $photoID;
}
print_r($myarray);
Do you want to create a key value pair? In that case why don't u try
$myarray["4345"]=12;
which will end up and array like
Array ( [0] => 1233 [1] => 4345 [2] => 3452 [4345] => 12 )
"4345 => 12"is easy. But is that really what you want? Can you take a step back and explain what the goal is here?