how to check if PHP variable contains non-numbers?

Question

I just want to know the method to check a PHP variable for any non-numbers and if it also detects spaces between characters? Need to make sure nothing weird gets put into my for

Answer 1

This will check whether the input value is numeric or not. Hope this helps

if(!preg_match('#[^0-9]#',$value))
{
    echo "Value is numeric";
}
else
{
    echo "Value not numeric";
}