3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php // without OB echo 'before_ob' . PHP_EOL; ob_start(); // first level begins // this line will be in $second echo 'second_ob' . PHP_EOL; ob_start(); // second level begins // these 2 lines will be in $first echo 'third_ob' . PHP_EOL; echo '------' . PHP_EOL; $first = ob_get_clean() . 1; // this line will be in second // but w/o previous 2 lines echo '------' . PHP_EOL; $second = ob_get_clean() . 2; // this will output $first consisting of 2 lines. // and $second without them. var_dump($second,$first);
based on GgHTh
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
before_ob string(18) "second_ob ------ 2" string(17) "third_ob ------ 1"