CODEWITHSUNDEEP
php
Sara García
Sara García

Reputation: 75

How to make an addition Operation inside of a function in php?

i made a function that has an addition operation inside.. but when i call the function it shows an error

A non-numeric value encountered in...

my function is like this:

function get_pages($start){
echo '
<a href="page/'. $start + 1 .'">Next</a>
<a href="page/'. $start - 1 .'">Previous</a>
'
}

Calling function

get_pages($_GET['page']);

please can you give any solution for it?

Upvotes: 0

Views: 27

Answers (1)

MEDZ
MEDZ

Reputation: 2295

You need to first check if the passed value is_numeric (number or numeric string) and then group the operation together before concatenating it to a string:

function get_pages($start){
  if(is_numeric($start)){
   echo '
     <a href="page/'. ($start + 1) .'">Next</a>
     <a href="page/'. ($start - 1) .'">Previous</a>
   ';
  }
}

Upvotes: 1

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