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PHP FILTER_VALIDATE_INT

Posted on 2010-08-27
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Last Modified: 2013-12-13
hi,

How would I validate a users integer input with this function?
I want the min number to be 0 and max to be 9.

and what if I have multiple user values that I want to validate do I put it in an array?


thanks!
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Question by:Solutionabc
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4 Comments
 
LVL 11

Expert Comment

by:Rajesh Dalmia
ID: 33541503
can try something like....

<?php

$intVal = $_REQUEST['FormField'];

if($intVal > 0 and $intVal < 9)
{
echo "valid no.";
}
else
{
echo "invalid";
}

?>
0
 

Author Comment

by:Solutionabc
ID: 33541565
If I have the code below, and verseQ = 10, will var_dump return false?

if it does how do I check the returned value?
$verseQ = $_POST["verseQb"];

$int_verseQ = array("options"=>
array("min_range"=>0, "max_range"=>9));

var_dump(filter_var($verseQ, FILTER_VALIDATE_INT, $int_verseQ));

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0
 
LVL 11

Expert Comment

by:Rajesh Dalmia
ID: 33541590
yes...
but if code not working then have to check what values is getting assigned to verseQ.

to make sure it always have integer value change the line to

$verseQ = $_POST["verseQb"] + 0;
0
 
LVL 110

Accepted Solution

by:
Ray Paseur earned 250 total points
ID: 33549494
Consider adding this to the top of all your scripts:

error_reporting(E_ALL);

It will reveal a multitude of important notices!

Also, you need to understand that PHP is a loosely typed language.  So in many cases, "10" (a string of two characters) will be treated the same as 10 (an integer equal to hexadecimal A).

As you expect, the code snippet show boolean FALSE.

Cheers, ~Ray
<?php // RAY_temp_Solutionabc.php
error_reporting(E_ALL);

// SET HERE TO AVOID THROWING A NOTICE
$_POST["verseQb"] = '10';

// COPIED FROM THE POST AT EE
$verseQ = $_POST["verseQb"];

$int_verseQ = array("options"=>
array("min_range"=>0, "max_range"=>9));

var_dump(filter_var($verseQ, FILTER_VALIDATE_INT, $int_verseQ));

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