Getting array param out of query string with PHP

Question

(NOTE: This is a follow up to a previous question, How to pass an array within a query string?, where I asked about standard methods for passing arrays within query strings.)

I now have some PHP code that needs to consume the said query string- What kind of query string array formats does PHP recognize, and do I have to do anything special to retrieve the array?

The following doesn't seem to work:

Query string:

?formparts=[a,b,c]

PHP:

$myarray = $_GET["formparts"];
echo gettype($myarray)

result:

string

next time try to explain better your question, because as now it's unreadable — dynamic
– dynamic, Commented Jun 5, 2011 at 15:07
There's only one type of array in php, an "array". The format depends on what you put into them. — Marc B
– Marc B, Commented Jun 5, 2011 at 15:11

soulmerge · Accepted Answer · 2011-06-05 15:12:12Z

3

Your query string should rather look like this:

?formparts[]=a&formparts[]=b&formparts[]=c

answered Jun 5, 2011 at 15:12

soulmerge

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KyleWpppd · Accepted Answer · 2011-06-05 15:12:46Z

0

If you're dealing with a query string, you are looking at the $_GET variable. This will contain everything after the ? in your previous question.

So what you will have to do is pretty much the opposite of the other question.

$products = array();
// ... Add some checking of $_GET to make sure it is sane
....
// then assign..
$products = explode(',', $_GET['pname']);

and so on for each variable. I must give you a full warning here, you MUST check what comes through the $_GET variable to make sure it is sane. Otherwise you risk having your site compromised.

answered Jun 5, 2011 at 15:12

KyleWpppd

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2 Comments

Yarin Over a year ago

@KyleWppd- I'm talking about passing arrays WITHIN query strings, not the query string GET array itself- See @soulmerge's answer

KyleWpppd Over a year ago

By definition in PHP, and variable passed as part of a $_GET or $_POST request is a string. I can't speak to whether soulmerge's answer will work or not, but he is using a different syntax to assign into the array than you are.

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