Check out example codes for "php convert string to boolean". It will help you in understanding the concepts better.
Code Example 1
// (PHP 5 >= 5.5.0, PHP 7) // boolval — Get the boolean value of a variable boolval ( mixed $var ) : bool // Returns the boolean value of var.
Code Example 2
/** * Strings always evaluate to boolean true unless they have a * value that's considered "empty" by PHP (taken from the * documentation for empty): * "" (an empty string) evaluates as false. * "0" (0 as a string) evaulates as false. * If you need to set a boolean based on the text value of a * string, then you'll need to check for the presence or * otherwise of that value. */ $boolean = $string === 'true' ? true: false;
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