Checking a variable to see if its numbers or letters

[ESCForums_com]

I want to check to see if a variable contains letters or numbers, and if its contains any letters make it equal to "0".

Thanks

-Phil

[planetsim]

Well for numeric you can use is_numeric

[SP8600]

I have the same thing going here but dont know what to do. I have this code and instead of it seeing if the row[img1] is equal to spacer how could i get it to see if it is just numbers then echo the spacer.gif but if it is not just numbers then do the else stament

<td align=\"center\"><img src=\"");if ($row['img1'] == 'spacer') {echo("$image_url");echo("spacer.gif");}
else {echo("$image_url".$row["img1"] ."");}echo("\" width=\"250\" height=\"190\"></td>

[ESCForums_com]

The first statement says if the variable $row['img1'] is not fully numbers then blah blah, otherwise if it is just numbers then echo else..

Be sure to check out this for more info:
function.is-numeric

if (!isnumeric($row['img1']))
{ 
echo"$image_url";
echo"spacer.gif";
} 
else 
{
echo $image_url.$row["img1"];
}

[bernouli]

if (!isnumeric($row['img1']))

you meant code=php
[/code]

[ESCForums_com]

Yah make sure not to forget the underscore lol 😉