PHP: Array declaration and named variable

Question

What is the deference between array('hi'=>$hello) and array(':hi'=>$hello)

I am using the second form to insert my data using prepare statement by extending PDO which is working fine. However when I change array declaration to first form array('hi'=>$hello) no data is being inserted, I was wondering how they both work.

Possible duplicate of PHP prepared statement - what are parameter colon's used for? — Kalkran
– Kalkran, Commented Feb 18, 2016 at 7:52

Matt Magallo · Accepted Answer · 2016-02-18 07:51:29Z

1

':hi' is a named variable and also an index/key in your array this can pass values to your database (Used in PDO).

'hi' is just an index/key in your array

answered Feb 18, 2016 at 7:51

Matt Magallo

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Community · Accepted Answer · 2017-05-23 12:31:05Z

0

Your first example:

array('hi' => $hello);

creates a key called 'hi', and your second example creates a key :hi. To use PDO parameters you need to prepend the parameters with a colon. The colon is used to designate and identify the parameters. See PDO prepared statement - what are colons in parameter names used for?

edited May 23, 2017 at 12:31

CommunityBot

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answered Feb 18, 2016 at 7:51

Kalkran

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