ob_flush

Function • Return type changed in PHP 8.0

Flush (send) the return value of the active output handler.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1-8.2
PHP 8.3
PHP 8.4
PHP 8.5

ob_flush Function synopsis

ob_flush(): bool

Parameters

ob_flush does not take any parameters.

Return value

Typebool

Returns true on success, false on failure

Changes to the ob_flush Function

PHP 8.0

  • Return type added: bool
- ob_flush()
+ ob_flush(): bool

ob_flush Function Availability

PHP VersionAvailability
PHP 8.5Upcoming Release Yes
PHP 8.4Supported (Latest) Yes
PHP 8.3Supported Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Security-Fixes Only Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes