Check if a variable is an integer in PHP -

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• checking if variable integer in php 11 answers

i doing pagination script , want give users ability control how many results shown in 1 page. doing through use of variable, this: example.org/articles.php?count=10. problem variable must integer or code spits out random errors, of contains information user should not seeing.

here code:

// checks if there variable (this part works fine) if (isset($_get["count"])) {     if (!empty($_get["count"])) {         $page_rows = $_get["count"];     } else {          $page_rows = $page_rows_default;     } } else {  $page_rows = $page_rows_default; }  // checks if variable interger // if not, offending value replaced 0  // (it doesn't work) if(is_int($page_rows) == false) {     $page_rows = 0; } 

from experimentation code can tolerate zeros , negative integers, fails hard when given ?count=asdf. not want user able crash script injecting random text variables. how script automatically detect non-integer values can dealt instead of halting code?

you can use is_numeric(). reference http://php.net/manual/en/function.is-numeric.php