(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
ob_get_level — Return the nesting level of the output buffering mechanism
This function has no parameters.
Returns the level of nested output buffering handlers or zero if output buffering is not active.
The value for identical levels between ob_get_level()
and ob_get_status() is off by one.
For ob_get_level()
the first level is 1.
Whereas for ob_get_status()
the first level is 0.