Send boolean data in postman form-data-CodePudding

I have tried to send boolean data type using postman form-data, but in php it read as string. I have tried to convert it using manual casting (bool) and boolVal(), but the result always true whenever I send false or true value in the postman.

Is there any solution with this problem? I can't use it in if statement cause it always return true whenever I tried to cast it to bool.

if ($request->isDiscount) {
   $price = $request->price * 10/100;
}

the above code will always get executed whenever the value of isDiscounted is true or false

have tried below too

if ($request->isDiscount == true) {
   $price = $request->price * 10/100;
}

if ((bool)$request->isDiscount == true) {
   $price = $request->price * 10/100;
}

 if (boolVal($request->isDiscount) == true) {
       $price = $request->price * 10/100;
 }

but the code always get executed

CodePudding user response：

As there are no data-types within the form-data this is pretty normal. The text true is a non-empty string and therefore interpreted as boolean true within PHP. The same for the text false which is also a non-empty string and therefore interpreted as boolean true.

It is up to your code to interpret submitted data as integer/text/boolean/whatever. In this case I would submit the text 1 for true and 0 for false and on the server's side convert it to integer which you can use for your if as integer 0 is interpreted as boolean false and all other integers as boolean true.

Keep in mind to sanitize all the data submitted to avoid SQL-injections and so on.

CodePudding user response：

Not familiar with postman, but if it's sending via GET maybe try

if ($_GET['isDiscount']) {
       $price = $_GET['isDiscount'] * 10/100;
 }

$price = $_GET['isDiscount'] ? $_GET['isDiscount']*10/100 : false;

Also I sanitize _GET with this function from my library

function num ($input){ 
  if(strlen($input) > 24){ $input=0; }
  if(!preg_match('/^[0-9] $/', $input)){ $input=0; } 
  return $input;
 }

Using function is fun & easy...

$discount = num($_GET['isDiscount']) ?: false;

For those wondering why I check a numbers length with strlen... years ago a player in my game discovered if he entered in a big enough number, he would give him a butt load of free war units.. you could remove that part or change length.

Let me know if this helps you, i'll check back in 10 mins.

CodePudding user response：

PHP reads all form data as strings.

There's 2 approaches you can take (plus more, but I'll explain 2 common ones):

Pass data as JSON
Use PHP's filter_var function

Pass data as JSON

https://www.php.net/manual/en/function.json-decode

https://www.php.net/manual/en/wrappers.php.php#wrappers.php.input

Sending the data as a JSON string and then decode it in PHP. An easy way I've found to do this is like so:

All data will be decoding into the relevant types.

Use PHP's filter_var function

https://www.php.net/manual/en/function.filter-var.php

This allows you to use built-in PHP functions to convert from a string, the the selected type (using the $filter argument).

An example using filter_var to return a bool value:

The drawbacks of using filter_var is that you are limited to interpreting a string which means you need to ensure that data being posted is in the correct format