ob_get_level()
ob_get_level() — Return the nesting level of the output buffering mechanism.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
Signature
ob_get_level(): int
Parameters
This function takes no parameters.
Return value
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.
Example
The PHP manual ships no example for ob_get_level(); the signature and the parameter table above are the contract.
See also
ob_start(), ob_get_status(), ob_get_contents()
All PHP 8.5 built-in functions
Reference card built from the PHP manual page ob_get_level() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.