How to remove garbage data from array output

Question

I am inserting multiple images on server and storing there name in SQL database by (,) seperated using this.

if($request->hasFile('images')){
     $images= [];
        foreach($images=$request->file('images') as $img) {
             $name=$img->getClientOriginalName();
             $img->move(public_path().'/dpic', $name);    

            $images[]=$name;
        }

    }
            $test =implode(", ", $images);   
            $product->images  =$test;

Image name are inserting into database along with some data it shows output like.

/tmp/php59iuBb, /tmp/phpdRewVH, PicturesI.jpg, Screenshot.png

I want to remove this /tmp/php59iuBb, /tmp/phpdRewVH from output How can I do that.

please guide me to do so.

Answer 1

I would do this

$images =[
    '/tmp/php59iuBb', '/tmp/phpdRewVH', 'PicturesI.jpg', 'Screenshot.png'
];

$images = preg_grep('~^(?!/tmp/)~', $images);

print_r($images);

Output

Array
(
    [2] => PicturesI.jpg
    [3] => Screenshot.png
)

Sandbox

Simple right!

Preg grep runs a regular expression against an array and returns the matches.

In this case

• ~^(?!/tmp/)~ negative lookbehind - insures that the match does not start with /tmp/

Which leaves us what we want.

Another option is

 $images = array_filter($images,function($image){
               return substr($image, 0, 5) != '/tmp/';
           });

If you are not feeling the Regex love.

Sandbox

PS I love preg_grep its often overlooked for easier to understand but much more lengthy code. Preg Filter is another one of those, which you can use to prefix or suffix an entire array. For example I've used it to prepend paths to an array of filenames etc. For example it's this easy:

$images =[
    '/tmp/php59iuBb', '/tmp/phpdRewVH', 'PicturesI.jpg', 'Screenshot.png'
];

print_r(preg_filter('~^(?!/tmp/)~', '/home/images/', $images));
//or you can add a whole image tag, if you want, with a capture group (.+) and backrefrence \1
print_r(preg_filter('~^(?!/tmp/)(.+)~', '<img src="/home/images/\1" />', $images));

Output

Array
(
    [2] => /home/images/PicturesI.jpg
    [3] => /home/images/Screenshot.png
)

Array
(
    [2] => <img src="/home/images/PicturesI.jpg" />
    [3] => <img src="/home/images/Screenshot.png" />
)

Sandbox

I thought you may find that "trick" useful as you can remove the bad ones and add a path to the good at the same time. They are worth checking out.

http://php.net/manual/en/function.preg-grep.php

http://php.net/manual/en/function.preg-filter.php

I feel like I should mention the same holds true for matching a file extension, which may also be useful, but I will leave that for another day.

Cheers!

Answer 2

Bit late to the party, but I would personally prefer using pathinfo over regular expressions here, since it's dedicated to file paths:

$images = ['/tmp/php59iuBb', '/tmp/phpdRewVH', 'PicturesI.jpg', 'Screenshot.png'];

$images = array_filter($images, function ($image) {
  return pathinfo($image, PATHINFO_DIRNAME) !== '/tmp';
});

print_r($images);

Demo: https://3v4l.org/6F6K8