Joining variables based on critera

[system]

Hi,
I am trying to find a way to join together numerous variables if they are strings and consecutive in an array.

1529 = WORD1
1530 = WORD2
1531 = WORD3
1557 = 2
1559 = WORD4
1569 = 8

The above would join words 1, 2 and 3 into a single variable, but leave word 4 on it’s own. I am not sure how to approach this so any suggestions would be much appreciated. Thanks

[Noodles]

be some thing on the lines of counting the array
but this is not going to work as is its just a sort of help to try and get you going

[php]for($i=0;$i<100;$i++) {

if (is_string($var[$i][0]) && (not_num($var[$i][0])) {
$var = $var1.$var2.$var3
}

}[/php]

[boxoroxs]

How about a switch?