Changes in converting other types of PHP to the Bool type-php Tutorial

In PHP, when other types are converted to the Bool type, the following error occurs: if (true = 2) in PHP, Will true or false be returned?

The result is true. in this case, I will test other php Data types.

Conclusion:

When converted to the bool type, the following data types are converted to false:

1. integer 0

2. empty string

3. empty array

4. NULL

Please add...

Test code:

 Function p ($ title, $ mybool ){
Echo"
".$title;
    echo var_dump($mybool)."
";
}
Class foo {
Function do_foo (){
Echo "Hello! ";
}
}
Echo"
Convert other types in PHP to Bool type
";
// Zero
$ N0 = boolval (0 );
P ("zero:", $ n0 );

// Positive integer
$ N = boolval (2 );
P ("positive integer:", $ n );

// Negative integer
$ Nx = boolval (-2 );
P ("negative integer:", $ nx );

// Character space
$ Ss = boolval ("");
P ("Space:", $ ss );

// Empty string
$ Sn = boolval ("");
P ("null string:", $ sn );

// String
$ S = boolval ("chinacion ");
P ("string:", $ s );

// Empty array
$ An = boolval (array ());
P ("empty array:", $ );

// Array
$ A = boolval (array (0 => 1 ));
P ("array:", $ );

// Null type
$ Nu = boolval (NULL );
P ("NULL:", $ nu );

// Object
$ Bar = new foo;
$ Bar;
$ Obj = boolval ($ bar );
P ("Object:", $ obj );