How can I remove a bit flag in PHP int?

Question

Let's say I have

$flags=JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;

How can I then remove JSON_UNESCAPED_SLASHES from $flags?

Answer 1

It's not "C method" it's just applying bitwise operators

$flags=JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;

var_dump($flags & JSON_UNESCAPED_SLASHES); // flag should be set to 1

$flags &= ~JSON_UNESCAPED_SLASHES; // remove it  

var_dump($flags & JSON_UNESCAPED_SLASHES); // flag should be set to 0