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verify input is int or double

Posted on 2003-12-08
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Last Modified: 2010-08-05
I need to verify that input given in a form field is an int or double...  The number they enter should be a price, so I'm guessing that the user will either enter: 5 or 5.00

How can I check this?
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Question by:msknr
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Accepted Solution

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Rayni earned 25 total points
ID: 9898520
// Checks To See If Numeric
if (is_numeric($price))
{
    // Checks if price is a integer
    if (is_int($price))
    {
         print "Is a integer";
    }
    // Checks if price is a double
    if (is_double($price))
    {
         print "Is a double";
    }
}

In this code you will want to use is_numeric first to even see if the price is numberic or a numberic string. This will help if your int / double checking code is very long and you dont want to have to run it unless the price is a number.

is_int while check to see if price is a int in this code, and is_double will check to see if price is a float since is_double is only alias of is_float. You can still use it for your purposes though.

Hope this helps you.

- Daniel
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