(PECL uopz >= 1.0.0)
uopz_delete — Delete a function
$class
   , string $function
   )$function
   )Deletes a function or method
class
function
Example #1 uopz_delete() example
<?php
uopz_delete("strlen");
echo strlen("Hello World");
?>
The above example will output something similar to:
PHP Fatal error: Call to undefined function strlen() in /path/to/script.php on line 4
Example #2 uopz_delete() class example
<?php
class My {
    public static function strlen($arg) {
        return strlen($arg);
    }
}
uopz_delete(My::class, "strlen");
echo My::strlen("Hello World");
?>
The above example will output something similar to:
PHP Fatal error: Call to undefined method My::strlen() in /path/to/script.php on line 10