I want to filter and get the code working with ONLY FLOAT NUMBERS

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I have this code below, and I want to know why is entering in the first "if", if for example in the $temp variable there is a number like 500, 5, 70, or whatever. I'm looking to filter FLOAT numbers only, like the filter says

$temp = trim(htmlspecialchars(strip_tags($_REQUEST["temp"]), ENT_QUOTES, "UTF-8"));
$se = trim(htmlspecialchars(strip_tags($_REQUEST["select"]), ENT_QUOTES, "UTF-8"));

if (!empty($temp) && filter_var($temp, FILTER_VALIDATE_FLOAT)) {
   if ($se == "celsius" && $temp >= -273.15) {
         $result = round(32+(1.8*$temp), 2);
         echo "$temp ºC = $result ºF";
   } else if ($se == "fahrenheit" && $temp >= -459.67) {
        $result = round(($temp-32)/1.8, 2);
         echo "$temp ºF = $result ºC";
   } else {
        echo "El valor introducido no puede menor que -273,15 si es Celsius, o menor que -459,67 si
          es Fahrenheit";
   }
 } else {
      echo "Rellene el campo con un número decimal, por favor";
}

filter_var will actually turn a value from int, string to a float number. That means that if you call:

filter_var(400, FILTER_VALIDATE_FLOAT)
filter_var('400', FILTER_VALIDATE_FLOAT)

the result of both calls would be the float number 400.0.

If you actually need to see if the given number has a decimal separator you could check it like:

if (is_numeric($temp) && strpos($temp, '.') !== false) {

}

allowing input only for float number, I filter the first position input with the jQuery Caret plugin. Otherwise, once the I use this - works for keyboard input or copy and paste If you only want to accept positive numbers simply remove the '-?' from the Read code and test here. Then click OK, all the numbers you need have been filtered out. If you check True option, you will filter only the whole numbers, and if you check False option, you will get all the decimal numbers. See screenshots: 6. At last, you can delete the helper column as you need.

I can´t get the filter to work too right now, i am unsure about the reason in this case.

But try to use the is_float() function of PHP

Like this:

if (!empty($temp) && is_float($temp) {

JavaScript : Checking for Floating numbers, Javascript function to check if a field input contains numbers as well as decimal codes and we have kept the CSS code part common for all the validations. To get a string contains a number with no exponent, mandatory At present the function only checks whether a number has a decimal part or not. If you are looking for the addition of two floating numbers program in C, here in this tutorial we will help you to learn how to write a c program to add two floating numbers. C Program To Add Two Float Numbers. Just copy paste the below source code to add two float numbers in C compiler to test, how the source code works. Debug and learn how

may be because of the mixed data type. Check with var_dump to verify the data type. Use is_float() instead of filter_var

Python - Filter float strings from String list, Sometimes, while working with Python list, we can have a problem in which we need to separate the float values from valid strings. But problem arises when float values are in form of strings. a success, means it's a float, else it raises a ValueError and we can get desired string. Python3 code to demonstrate working of. Different parameters with float() Parameter Type Usage; Float number: Use as floating number: Integer: Use as integer: String: Must contain decimal numbers. Leading and trailing whitespaces are removed. Optional use of "+", "-" signs. Could contain NaN, Infinity, inf (lowercase or uppercase).

float() in Python, The float() method is used to return a floating point number from a number or a string. Syntax: float(x). The method only accepts one parameter and that is also Now let us look at various examples and the working of float() method. If you like GeeksforGeeks and would like to contribute, you can also write an article using� Here, we have a list of letters and need to filter out only the vowels in it. We could use a for loop to loop through each element in letters list and store it in another list, but in Python, this process is easier and faster using filter() method.

Template Designer Documentation — Jinja Documentation (3.0.x), Adding a .jinja extension, like user.html.jinja may make it easier for some IDEs or editor plugins, but is Filters that accept arguments have parentheses around the arguments, just like a function call. Escaping works by piping the variable through the |e filter: Inside code blocks, you can also assign values to variables . With filtering, you can control not only what you want to see, but what you want to exclude. You can filter based on choices you make from a list, or you can create specific filters to focus on exactly the data that you want to see. You can search for text and numbers when you filter by using the Search box in the filter interface.

Validate filters - Manual, Note that the function will only find ASCII URLs to be valid; internationalized As of PHP 5.4.11, the numbers +0 and -0 validate as both integers as well as floats FILTER_VALIDATE_URL does not work with URNs, examples of valid URIs in the domain part, a comment in the source code (in ext/filter/logical_filters.c)� Quickly filter a list of numbers in your browser. To get a filtered list, just enter your numbers in the input field, select the filtering criteria in the options below, and this utility will return only the numbers that match your criteria. Created by developers from team Browserling.

Comments
  • Are you looking for is_float() ?
  • I have switched filter_var with is_float, but is not working. I have tried the var_dump to see what was happening, and even If I give a number like 80.45, the value of is_float is false. Maybe the input type of the form is giving trouble? Because in my form, the input type is "text"
  • Thanks, that solution worked, but is that solution like "brute force"? Because is not actually looking for is the number is float or not, just if the number has a "." But yes, obviously if a number has a dot is float but well, I thought is_float may have worked but not