url updated

[Yang Li Ke]

What is the best way to know if a website was updated using php?

I tried maybe using the last modified date
but it seems that some sites dont have that
info.

Thank you all for your comments
--
Yang

[Pedro Graca]

Re: url updated

Yang Li Ke wrote:[color=blue]
> What is the best way to know if a website was updated using php?
>
> I tried maybe using the last modified date
> but it seems that some sites dont have that
> info.[/color]

I think your safer bet would be to save a copy of the page locally and
compare it to the page on the server.
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[CountScubula]

Re: url updated

"Yang Li Ke" <yanglike@sympa tico.ca> wrote in message
news:R0jMb.3592 $881.302793@new s20.bellglobal. com...[color=blue]
> What is the best way to know if a website was updated using php?
>
> I tried maybe using the last modified date
> but it seems that some sites dont have that
> info.
>
> Thank you all for your comments
> --
> Yang
>
>[/color]

Grab the page, and run an md5 on the contents. save that, and check against
it.

however, any dynamic content such as the time, weather info, or number of
visitors, etc... will break the
comparison.



$prevCheck = "4410ec34d9e6c1 a68100ca0ce033f b17";

$page = file(http://www.google.com);

$pageSum = md5($page);

if ($pageSum != $prevCheck)
print "Page changed\n";




--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Pedro Graca]

Re: url updated

CountScubula wrote:[color=blue]
> $page = file(http://www.google.com);
>
> $pageSum = md5($page);[/color]

Sorry Mike :)
md5($array) does *not* do what you expect !!

cat xx.php
#v+
<?php
$x=array();
echo md5($x), "\n";
$x[] = 1;
echo md5($x), "\n";
$x[] = 2;
echo md5($x), "\n";
$x[] = 3;
echo md5($x), "\n";
$x[] = 4;
echo md5($x), "\n";
$x[] = 5;
echo md5($x), "\n";
print_r($x);
?>
#v-

the output is
4410ec34d9e6c1a 68100ca0ce033fb 17
4410ec34d9e6c1a 68100ca0ce033fb 17
4410ec34d9e6c1a 68100ca0ce033fb 17
4410ec34d9e6c1a 68100ca0ce033fb 17
4410ec34d9e6c1a 68100ca0ce033fb 17
4410ec34d9e6c1a 68100ca0ce033fb 17
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[Pedro Graca]

Re: url updated

CountScubula wrote:[color=blue]
> $page = file(http://www.google.com);[/color]
$page = file_get_conten ts($url); // or
$page = implode('', file($url));[color=blue]
>
> $pageSum = md5($page);[/color]

Nice Idea!
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[CountScubula]

Re: url updated

"Pedro Graca" <hexkid@hotpop. com> wrote in message
news:btsji7$ak9 dr$1@ID-203069.news.uni-berlin.de...[color=blue]
> CountScubula wrote:[color=green]
> > $page = file(http://www.google.com);
> >
> > $pageSum = md5($page);[/color]
>
> Sorry Mike :)
> md5($array) does *not* do what you expect !!
>[/color]

Ah yes, my fault,

should read:

$prevCheck = "b5efa612c52218 17eeb56ab6166b2 f48";

$page = implode("",file ("http://www.google.com" ));
$pageSum = md5($page);



--
Mike Bradley
http://www.gzentools.com -- free online php tools

[CountScubula]

Re: url updated

"Yang Li Ke" <yanglike@sympa tico.ca> wrote in message
news:R0jMb.3592 $881.302793@new s20.bellglobal. com...[color=blue]
> What is the best way to know if a website was updated using php?
>
> I tried maybe using the last modified date
> but it seems that some sites dont have that
> info.
>
> Thank you all for your comments
> --
> Yang
>
>[/color]

Ok, try this:

http://www.gzentools.com/snippetview.php?c=Functions&v=pagelyt.php

--
Mike Bradley
http://www.gzentools.com -- free online php tools