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Editorial Team
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Asked: 2026-05-25T23:17:27+00:00

I want a dead simple generic $_GET-vars validator, and don’t have any desire to

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I want a dead simple generic $_GET-vars validator, and don’t have any desire to reinvent the wheel.

Is there any solid and simple script I can use, something like:

function secure($varName,$format = 'int') {
//format: boolean,int,dec,str,date
    //add stripslashes if mq
    $var = $_GET[$varName];
switch($format) {
  case 'int':
    $r = floor($var);
    break;
  case 'boolean':
    $r = ($var === true);
    break;
  case 'dec':
    $r = preg_replace("/0-9.-/i", "", $val);
    break;
  case 'str':
    ..
  case 'date':
    //ISO 8601 is enough...
}

regards,
//t

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1 Answer

  1. Editorial Team

    filter_input() comes fairly close to what you want to do.

    It’s got a decent number of validation and sanitation filters.

    An example stolen from the manual:

    <?php
var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
var_dump(filter_var('http://example.com', FILTER_VALIDATE_URL, 
                                          FILTER_FLAG_PATH_REQUIRED));
?>
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