if we have 5 different array how to merge them in single array in php

if we have 5 different array how to merge them in single array in php

I have 5 different array whose structure is :-
Array ( [0] => http://www.php.net/200
)
Array ( [0] => http://www.php.net/?setbeta=1&beta=1302
)
Array ( [0] => http://www.php.net/downloads.php200
)
Array ( [0] => http://www.php.net/docs.php200
)
Array ( [0] => http://www.php.net/FAQ.php302
)
I need to merge these all in a single array whose structure would be like:-
Array ( [0] => http://www.php.net/200
[1] => http://www.php.net/?setbeta=1&beta=1302
[2] => http://www.php.net/downloads.php200
[3] => http://www.php.net/docs.php200
[4] => http://www.php.net/FAQ.php302
)