> array (
> 20040310, Title, Author
> 20041115, Title, Author
> 20040513, Title, Author
> )
>
> where each array element is 1 line from the csv. When I go to print it
> out, Im going to explode each by , and then print it out the way I like.
>
> BUT, I want to sort them all by those first 8 digits, which happen to be
> the date. Any way to sort an array by the first x characters in its
> string?
>
> This would save a lot on processor time, otherwise Im going to have to
> pull an array of those characters, sort it, and then run some matching
> scheme against the CSV data to print it in the order I like - which would
> be HUGELY processor intensive.
I think sort should do it for you
$array = array("20040310, Title, Author",
"20041115, Title, Author",
"20040513, Title, Author");
sort($array);
reset($array);
while (list($key, $val) = each($array)) {
echo "array[" . $key . "] = " . $val . "<br />";
}
but, if you wanted to just make sure it was the first entry in the CSV try usort
function cmp($a, $b)
{
$first = explode(',', $a);
$second = explode(',', $b);
if ($first == $second) {
return 0;
}
return ($first < $second) ? -1 : 1;
}
$array = array("20040310, Title, Author",
"20041115, Title, Author",
"20040513, Title, Author");
usort($array, "cmp");
while (list($key, $value) = each($array)) {
echo "array[" . $key . "] = " . $value . "<br />";
}
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