PHP: intval() equivalent for numbers >= 2147483647

integer, numbers, php, types

Solution

Try this function, it will properly remove any decimal as intval does and remove any non-numeric characters.

<?php
function bigintval($value) {
  $value = trim($value);
  if (ctype_digit($value)) {
    return $value;
  }
  $value = preg_replace("/[^0-9](.*)$/", '', $value);
  if (ctype_digit($value)) {
    return $value;
  }
  return 0;
}

// SOME TESTING
echo '"3147483647.37" : '.bigintval("3147483647.37")."<br />";
echo '"3498773982793749879873429874.30872974" : '.bigintval("3498773982793749879873429874.30872974")."<br />";
echo '"hi mom!" : '.bigintval("hi mom!")."<br />";
echo '"+0123.45e6" : '.bigintval("+0123.45e6")."<br />";
?>

Here is the produced output:

"3147483647.37" : 3147483647
"3498773982793749879873429874.30872974" : 3498773982793749879873429874
"hi mom!" : 0
"+0123.45e6" : 0

Hope that helps!

Problem

In PHP 5, I use intval() whenever I get numbers as an input. This way, I want to ensure that I get no strings or floating numbers. My input numbers should all be in whole numbers. But when I get numbers >= 2147483647, the signed integer limit is crossed. What can I do to have an intval() equivalent for numbers in all sizes? Here's what I want to have: ``` <?php $inputNumber = 3147483647.37; $intNumber = intvalEquivalent($inputNumber); echo $intNumber; // output: 3147483647 ?> ``` Thank you very much in advance! Edit: Based on some answers, I've tried to code an equivalent function. But it doesn't work exactly as intval() does yet. How can I improve it? What is wrong with it? ``` function intval2($text) { $text = trim($text); $result = ctype_digit($text); if ($result == TRUE) { return $text; } else { $newText = sprintf('%.0f', $text); $result = ctype_digit($newText); if ($result == TRUE) { return $newText; } else { return 0; } } } ```

Original source