3v4l.org

run code in 500+ PHP versions simultaneously
<?php function my_cb( $a ) { return $a; } ob_start( 'my_cb', 0 ); ob_start( 'my_cb', 1 ); ob_start( 'my_cb', 2 ); $status = ob_get_status( true ); var_dump( array_combine( array_column( $status, 'chunk_size' ), array_column( $status, 'buffer_size' ) ) );
Output for 8.5.0 - 8.5.3
array(3) { [0]=> int(16384) [1]=> int(4096) [2]=> int(4096) }
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
array(3) { [0]=> int(16384) [1]=> int(16384) [2]=> int(4096) }
preferences:
56.28 ms | 986 KiB | 4 Q