Numeric Validation of textbox

[mikebyrne]

I have two textboxes where I want the user to only be allowed to pass numeric values to my table. The textboxs are "Stockamount" & "Price". At present I've only validated for leaving the fields blank.

 

How do I code the numeric validation?

 

My code

 

if ($_POST['Stockamount']=="") {
                $valid=0;
                $style_name = "background-color:#FF5959";
                $error_amount = "Please enter the ammount of stock recivied<br>";
									}
	if ($_POST['Price']=="") {
                $valid=0;
                $style_name = "background-color:#FF5959";
                $error_price = "Please enter the product price<br>";
									}	

 

[PC Nerd]

if(!is_int($_GET['Price'])) {

  # This is what happens when the input isnt an integer.

}

 

also - try maybe a bit of JavaScript validation for the users end to save them entering thigns and continually submitting

 

[zenag]

tis is numeric  validation  in php

 

if(is_numeric($_POST['Stockamount']))

{

echo "entered  numeric value";

}

else

{

echo "non numeric";

}

 

[mikebyrne]

So in my case?

 

if(!is_numeric($_POST['Price'])) {

  $valid=0;

                $style_name = "background-color:#FF5959";

                $error_amount = "Please enter numeric values only<br>";

    }

 

In terms of the Javascript side of things how would I code that around the textbox as Im not too familar with it?

 

The one bit i do have is around my clear button

 

<input type="reset" value="" style="border:0;background:url(../Admin_files/btn_clear.gif) no-repeat;width:73px;height:23px;" onclick="return confirm('Are you sure you want to clear all data?')">

 

The Price textbox looks like this

 

<input type="text" class="itemEditForm04" name="Price" value="<?php echo $row['Price'];?>" /> <td width="269"><font color="#FF0000" style="font-size: 8pt"><?php echo $error_price; ?></font></td>

[lordfrikk]

Or you can use simple regex:

 

<?php
if (preg_match('#^\d+$#', $_POST['price'])):
	print "Is Numeric.";
else:
	print "Isn't Numeric.";
endif;
?>

[mikebyrne]

At present the validation still isnt working 100%

 

If I leave the textbox blank I get both error reports

If I insert only Letters = "Please enter a numeric value"

If I insert numbers = No errors (which is correct)

 

if ($_POST['Price']=="") {
                $valid=0;
                $style_name = "background-color:#FF5959";
                $error_price = "Please enter the product price<br>";
				}

	if(!is_numeric($_POST['Price'])) {
   				$valid=0;
                $style_name = "background-color:#FF5959";
                $error_price1 = "Please enter numeric values only";
                                        }

<input type="text" class="itemEditForm04" name="Price" value="<?php $row['Price'];?>" /> <td width="269"><font color="#FF0000" style="font-size: 8pt"><?php echo $error_price; ?><?php echo $error_price1; ?></font></td>

 

[wildteen88]

No need to for any complex regex

<?php

if(isset($_POST['Price']))
{
    if(empty($_POST['Price']))
    {
        $price_error = 'Please provide a price';
    }
    elseif(!is_numeric($_POST['Price']))
    {
        $price_error = 'Price is invalid. Numbers only (eg: 123.45)';
    }
}

?>
<input type="text" class="itemEditForm04" name="Price" value="<?php $row['Price'];?>" />
<?php if($price_error): ?><span style="font-size: 8pt; color:#FF0000"><?php echo $error_price; ?></span><?php endif; ?>

[mikebyrne]

See the problem I have is that my validation starts with

 

if($_POST["action"] == "Add"){

        $valid=1;

if ($_POST['Price']=="") {
                
                                $valid=0;
                $style_name = "background-color:#FF5959";
                $error_price = "Please enter the product price<br>";
									}	
	if(!is_numeric($_POST['Price'])) {
   				$valid=0;
                $style_name = "background-color:#FF5959";
                $error_price1 = "Please enter numeric values only";
                                        }

 

How can I combine the $valid with your example??

 

[wildteen88]

Just add $valid=0; in the if/else statement:

if(isset($_POST['Price']))
{
    $valid = 1;
    if(empty($_POST['Price']))
    {
        $valid = 0;
        $price_error = 'Please provide a price';
    }
    elseif(!is_numeric($_POST['Price']))
    {
        $valid = 0;
        $price_error = 'Price is invalid. Numbers only (eg: 123.45)';
    }
}