如何从$ _FILES数组中丢弃空的HTML表单输入

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

Answer 1

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']));