breaking string and putting mysql.. please help

[macintosh]

I want to put all words of a string in different rows of a table in mysql. for example.
$mystring="this is an ugly string"
i want to put in mysql table like

id word
1 this
2 is
3 an
4 ugly
5 string


i think first i have to use explode function then use for each loop, but im not able to write the correct sytax, can someone help me with the syntax please ?
Thanks

[ruba]

$mystring="this is an ugly string"
echo str_replace(' ', chr(10) ,$mystring);
or 
echo str_replace(' ' ,'<br>' ,$mystring);

[Raju Gautam]

Try out this code:

$words = "this is an ugly string";
$list = split(' ', $words);
foreach($list as $ws){
echo $ws;
}