Weird behavior of $_POST var 3

[Sleidia]

Hi guys

I have this :

<input type="text" name="my_var[]" value="1" />
<input type="text" name="my_var[]" value="2" />
<input type="text" name="my_var[]" value="3" />

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Form is submitted

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$_POST["my_var"] = implode(",", $_POST["my_var"]);

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echo $_POST["my_var"]; // value is string "1,2,3"

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store_post_vars_in_db(); // this function takes $_POST vars and store them in the db

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// stored value is an array but not a string !!!

Why isn't the imploded variable in the db?
Is a copy of $_POST["my_var"] made in the process?

Thanks for the help

 

[thenewa2x]

The problem could be in the [tt]store_post_vars_in_db()[/tt] function.

 

[jet042]

Without more code, it is hard to tell exactly where the problem is. I would start by not writing the imploded string back into the $_POST superglobal and defining another variable instead.

Use that variable in your store_post_vars_in_db() function and you should be home free.

 

[Sleidia]

Yeah, seemed logic to me too but I don't see what could be wrong in this function.

Inside this function, the value is grabbed this way :

$value = $_POST[$field_array[$i]];

$field_array[$i] being the input name "my_var".

But yeah, a test on $_POST[$field_array[$i]] shows that it is an array, which shoudn't after the implode.

So, $_POST[$field_array[$i]] calls the variable before implode when $_POST["my_var"] calls the variable after implode.

I don't see why

 

[jpadie]

are you sure that the $field_array and $i variables are available inside the store_to_db function? if not then the key will be null and the db will get the entire $_POST array.

you can make the vars available through the global keyword.

otherwise - it's generally seen as bad practice to manipulate the contents of superglobals (other than $GLOBALS). but so long as you maintain control of your code and remember your steps (and document them for future maintainers) then it is (imo) no big deal.

 

[Sleidia]

Hey Jpadie back from holiday?

You were spot on! I fixed the issue thanks to you.
Very impressive considered the lack of information ahaha