How discard empty HTML form inputs from $_FILES array

Question

I have a HTML form with multiple file inputs

<input type='file' id='images' name='images[]'>

I use implode() to covert the $images array into comma separated string and insert it into my DB , then when calling I use explode() to recall single images.

the problem is : empty input fields are still submitted to the database , so when exploded, I get empty array values

how can I get rid of these empty array values ? maybe even before using implode function ?

I'm thinking of running a foreach loop throw the $_FILES['images'] array and discarding empty values from it and rebuilding a new array .. but is any easier method available ?

thanks

write more details about your program. [ your submit form. and code php code that handle these images ] — Mohsen Alizadeh
– Mohsen Alizadeh, Commented Nov 4, 2013 at 20:06

matewka · Accepted Answer · 2013-11-04 19:43:04Z

2

Use array_filter. It is a function which iterates over an array with another function specified as an argument. But if you don't pass this argument, the array_filter will simply get rid of the values equal fo FALSE.

$images = implode(',', array_filter($_FILES['images']));

answered Nov 4, 2013 at 19:43

matewka

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2 Comments

ml- Over a year ago

Dont forget that array_filter also removes (int) 0 if you use it without a callback function, so consider using something like an anonymous function to make sure its empty and not (int) 0 (aka == false)

Newbie Over a year ago

Just what I was looking for :)

AbraCadaver · Accepted Answer · 2013-11-04 19:43:10Z

1

$images = array_filter($_POST['images']);

But I would rethink the database design. You probably shouldn't be storing lists like that.

answered Nov 4, 2013 at 19:43

AbraCadaver

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