Re: [PHP] multiple random items
On Mon, July 16, 2007 9:40 am, [EMAIL PROTECTED] wrote:
> Hi I have this script which pulls 1 random item from a txt file.
> How would I modify it to pull 10 random items.
To forestall a rather lengthy discussion on what you mean by 10 random
items, I'm actually not going to answer that question.
I'm going to answer "10 unique items selected at random" instead. :-)
[I.e., I assume you don't want the same random quote to appear twice
in one list.]
> $delim = "\n";
> $quotefile = "names.txt";
> $fp = fopen($quotefile, "r");
> $contents = fread($fp, filesize($quotefile));
> $quote_arr = explode($delim,$contents);
> fclose($fp);
> // generate random quote index
$uniques = array();
while (count($uniques) < 10){
> $quote_index = (mt_rand(1, sizeof($quote_arr)) - 1);
if (isset($uniques[$quote_index])) continue;
$uniques[$quote_index] = $quote_index;
> // get quote at $quote_index and return it
> $herequote = $quote_arr[$quote_index];
> echo "$herequote";
}
> ?>
YMMV
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RE: [PHP] multiple random items
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: 16 July 2007 15:40
> To: php-general@lists.php.net
> Subject: [PHP] multiple random items
>
>
> Hi I have this script which pulls 1 random item from a txt file.
> How would I modify it to pull 10 random items.
>
> $delim = "\n";
> $quotefile = "names.txt";
> $fp = fopen($quotefile, "r");
> $contents = fread($fp, filesize($quotefile));
> $quote_arr = explode($delim,$contents);
> fclose($fp);
$random_keys = array_rand($quote_arr, min(count($quote_arr), 10));
foreach ($random_keys as $quote_index) {
// get quote at $quote_index and return it
$herequote = $quote_arr[$quote_index];
echo "$herequote";
}
?>
This won't produce any duplicates and will cope with any number of items.
Edward
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Re: [PHP] multiple random items
2007. 07. 16, hétfő keltezéssel 10.56-kor Robert Cummings ezt írta:
> On Mon, 2007-07-16 at 16:49 +0200, Zoltán Németh wrote:
> > 2007. 07. 16, hétfő keltezéssel 15.40-kor [EMAIL PROTECTED] ezt írta:
> > > Hi I have this script which pulls 1 random item from a txt file.
> > > How would I modify it to pull 10 random items.
> > >
> > > > > $delim = "\n";
> > > $quotefile = "names.txt";
> > > $fp = fopen($quotefile, "r");
> > > $contents = fread($fp, filesize($quotefile));
> > > $quote_arr = explode($delim,$contents);
> > > fclose($fp);
> >
> > $quotenum = 0;
> > $quotes_displayed = array();
> > while ($quotenum < 10) {
> > while (!in_array($quote_index, $quotes_displayed)) {
>
> I think you should remove the ! operator :)
oh yeah, typo
sorry
greets
Zoltán Németh
>
> Cheers,
> Rob.
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Re: [PHP] multiple random items
On Mon, 2007-07-16 at 16:49 +0200, Zoltán Németh wrote:
> 2007. 07. 16, hétfő keltezéssel 15.40-kor [EMAIL PROTECTED] ezt írta:
> > Hi I have this script which pulls 1 random item from a txt file.
> > How would I modify it to pull 10 random items.
> >
> > > $delim = "\n";
> > $quotefile = "names.txt";
> > $fp = fopen($quotefile, "r");
> > $contents = fread($fp, filesize($quotefile));
> > $quote_arr = explode($delim,$contents);
> > fclose($fp);
>
> $quotenum = 0;
> $quotes_displayed = array();
> while ($quotenum < 10) {
> while (!in_array($quote_index, $quotes_displayed)) {
I think you should remove the ! operator :)
Cheers,
Rob.
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Re: [PHP] multiple random items
On Mon, 2007-07-16 at 16:49 +0200, Zoltán Németh wrote:
> 2007. 07. 16, hétfő keltezéssel 15.40-kor [EMAIL PROTECTED] ezt írta:
> > Hi I have this script which pulls 1 random item from a txt file.
> > How would I modify it to pull 10 random items.
> >
> > > $delim = "\n";
> > $quotefile = "names.txt";
> > $fp = fopen($quotefile, "r");
> > $contents = fread($fp, filesize($quotefile));
> > $quote_arr = explode($delim,$contents);
> > fclose($fp);
>
> $quotenum = 0;
> $quotes_displayed = array();
> while ($quotenum < 10) {
> while (!in_array($quote_index, $quotes_displayed)) {
Oh sure!!! Go for unique random items ;) But what happens if the file
contains less than 10 items :)
Cheers,
Rob.
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Re: [PHP] multiple random items
On Mon, 2007-07-16 at 15:40 +0100, [EMAIL PROTECTED] wrote:
> Hi I have this script which pulls 1 random item from a txt file.
> How would I modify it to pull 10 random items.
>
> $delim = "\n";
> $quotefile = "names.txt";
> $fp = fopen($quotefile, "r");
> $contents = fread($fp, filesize($quotefile));
> $quote_arr = explode($delim,$contents);
> fclose($fp);
$herequotes = array();
for( $i = 0; $i < 10; $i++ )
{
> // generate random quote index
> $quote_index = (mt_rand(1, sizeof($quote_arr)) - 1);
> // get quote at $quote_index and return it
> $herequote = $quote_arr[$quote_index];
$herequotes[] = $herequote;
}
> echo "$herequote";
> ?>
>
> Thanks
You're welcome.
Cheers,
Rob.
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Re: [PHP] multiple random items
2007. 07. 16, hétfő keltezéssel 15.40-kor [EMAIL PROTECTED] ezt írta:
> Hi I have this script which pulls 1 random item from a txt file.
> How would I modify it to pull 10 random items.
>
> $delim = "\n";
> $quotefile = "names.txt";
> $fp = fopen($quotefile, "r");
> $contents = fread($fp, filesize($quotefile));
> $quote_arr = explode($delim,$contents);
> fclose($fp);
$quotenum = 0;
$quotes_displayed = array();
while ($quotenum < 10) {
while (!in_array($quote_index, $quotes_displayed)) {
> // generate random quote index
> $quote_index = (mt_rand(1, sizeof($quote_arr)) - 1);
}
> // get quote at $quote_index and return it
> $herequote = $quote_arr[$quote_index];
> echo "$herequote";
$quotes_displayed[] = $quote_index;
$quotenum++;
}
> ?>
>
hope that helps
greets
Zoltán Németh
> Thanks
>
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