PHP Conditional setting to Boolean True or False [closed] - php

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I set the following PHP Code:
if($motherFirst == 'yes')
{$motherBool = true;}
else
{$motherBool = false;}
if($fatherFirst == 'no')
{$fatherBool = true;}
else
{$fatherBool = false;}
I have checked that I'm obtaining Yes or No as a value for both $motherFirst and $fatherFirst by doing an echo.
I am then using $motherBool and $fatherBool to post boolean (true or false) not as string in an API call.
However it appears that they are being assigned true or false of type string. What can I do to convert them to Boolean?
Above has been corrected, but now have issue with following:
I'm also sending the json as follows:
$data_string = '{
"motherData": false,
"fatherData": true
}';
Which works, but when I put as follows, it doesn't work:
$data_string = '{
"motherData": '.$motherBool.',
"fatherData": '.$fatherBool.'
}';
Can you let me know?

Answer 1

Already answered but here is a simplification.
$motherBool = ($motherFirst == 'yes');
$fatherBool = ($fatherFirst == 'no');
In your second question you're echoing a bool as if its a string which will print 0 or 1, not true/false as your expecting. You need to convert the bool to a string. for example,
$data_string = '{
"motherData": '.($motherBool ? 'true' : 'false').',
"fatherData": '.($fatherBool ? 'true' : 'false').'
}';