3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array( 10, 123 ); $buf = pack( "N*", $data ); $valArray = unpack( "N*", $buf ); while( list( $key, $val ) = each( $valArray ) ) { echo "$key -> $val\n"; }

preferences:
44.2 ms | 402 KiB | 5 Q