Remove from array PHP

Question

I use preg_match_all($pattern, $string, $matches) regularly on data, and basically, I always need to remove either £0.00 or $0.00 or €0.00 from the array should it be in there.

I never know the position within the array that it will be in, if at all.

I've tried unset($matches['£0.00']) and unset($matches[0]['£0.00']) but didn't work

Also, can it be done without using the actual currency symbol and maybe regex \p{Sc}

So, summary, I have an array of numbers with currency symbols, and need to remove any zero entries.

sample array:

Array ( [0] => Array ( [0] => £18.99 [1] => £0.00 [2] => £0.00 [3] => £0.00 ) )

Is this possible?

Why don't you modify your $pattern to not match those in the first place? — lanzz
– lanzz, Commented Nov 19, 2012 at 6:31

Geek Num 88 · Accepted Answer · 2012-11-19 06:31:21Z

6

The usage of preg_match() and preg_match_all() sometimes can be weird

$matches will be array of the matches to the pattern - in this instance if you

preg_match("/\p{Sc}0\.00/","£0.00",$matches);
//$matches[0] => £0.00

or if you add parenthesis () to the pattern you can extract a part

preg_match("/\p{Sc}(0\.00)/","£0.00",$matches);
//$matches[0] => £0.00
//$matches[1] => 0.00

so to solve this problem try this

foreach($sample_array as $key => $value)
{
     if(preg_match("/(\$|\p{Sc})0\.00/",$value))
     {
          unset($sample_array[$key]);
     }
}

Notice the pipe | that denotes $ or £ - if you add another pipe for the euro symbol it will capture that as well - also notice that we are unset()-ing a key in the original array instead of unset()-ing the $matches array

answered Nov 19, 2012 at 6:31

Geek Num 88

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2 Comments

StudioTime Over a year ago

Thanks for this, is it then possible I could just change my original pattern to stop it at source instead of running preg_match again? Current pattern: $pattern = '/\p{Sc}\s*\d{1,3}(?:,\d{3})*(?:\.\d+)?/u';

Geek Num 88 Over a year ago

possibly - it looks like you are getting the numbers out in 2 separate parenthesis - check the value of $matches by doing a var_dump($matches) or print_r($matches)

Rithu Psks · Accepted Answer · 2012-11-19 07:05:47Z

0

function remove_element($arr, $val)

        {

            foreach ($arr as $key => $value)

            {

                if ($arr[$key] == $val)

                {

                unset($arr[$key]);

                }

            }

            return $arr = array_values($arr);

        }

You can use this function these function returns the array elements after delete the specified value.

answered Nov 19, 2012 at 7:05

Rithu Psks

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