Re: [PHP] echo text - anti-spam-spider measure
Richard Lynch wrote:
You could also use %XX in HEX on the mailto:
you can actually randomly mix and match hex and entity encoding,
which is what the function I posted elsewhere in the thread does.
On Tue, February 27, 2007 11:09 pm, Casey Chu wrote:
It works. =P I tested it.
Try it here! =P
http://themfund.com/snippets/test.php
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many
addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for
every
single
instance, most of which come from dynamically printed PHP
pages from a
MySQL database.
Could I dynamically create a flash image, input the email and
tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I
see many
problems, including:
1) How do I avoid echoing the email address in the a
href= tag?
2) How would I write a png that would be long and high
enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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Re: [PHP] echo text - anti-spam-spider measure
Richard Lynch wrote:
You could also use %XX in HEX on the mailto:
you can actually randomly mix and match hex and entity encoding,
which is what the function I posted elsewhere in the thread does.
My function also does that: http://themfund.com/snippets/test.php
On 3/1/07, Jochem Maas [EMAIL PROTECTED] wrote:
Richard Lynch wrote:
You could also use %XX in HEX on the mailto:
you can actually randomly mix and match hex and entity encoding,
which is what the function I posted elsewhere in the thread does.
On Tue, February 27, 2007 11:09 pm, Casey Chu wrote:
It works. =P I tested it.
Try it here! =P
http://themfund.com/snippets/test.php
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many
addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for
every
single
instance, most of which come from dynamically printed PHP
pages from a
MySQL database.
Could I dynamically create a flash image, input the email and
tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I
see many
problems, including:
1) How do I avoid echoing the email address in the a
href= tag?
2) How would I write a png that would be long and high
enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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Re: [PHP] echo text - anti-spam-spider measure
Stut wrote:
John Taylor-Johnston wrote:
Neat, and thnaks.
How spam-spider-proof is it? I will try this though.
But I will also try it with mailto:; in entities as well.
Thanks!
John
!-- HERE ARE THE ENTITIES --
a
href=mailto:#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;;#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;/a
!--ENTITIES ABOVE!--
Of all the possible methods, entities are the easiest for bots to
handle. They just need to decode the entities.
in the past I found the following to be annoying enough for harvesters not to
bother:
function obsfucateString($str)
{
$ret = '';
for ($i=0;$istrlen($str);++$i)
$ret.= (mt_rand(0,1) ? '#x'.sprintf(%X,ord($str{$i})) :
'#'.ord($str{$i})).';';
return $ret;
}
no idea if it's still even remotely useful.
More reliable methods involve using javascript to write out the mailto:
tag. Do it in several statements. But even then, some of the smarter
spiders will execute simple javascript like that. You can make it better
by using onload to execute the javascript which means the spider will
need to implement that, which I don't believe they do at the moment.
Of course the best way is to use an image and don't link it. If it's
just a way for visitors to contact you, use a contact form. You don't
expose the email address and can control it a lot better.
-Stut
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Re: [PHP] echo text - anti-spam-spider measure
At 11:22 PM -0500 2/27/07, John Taylor-Johnston wrote: I need an anti-spam-spider measure for my site. Too many addresses are getting raked. In once instance, I created a flash page: http://erasethis.glquebec.org/English/contact.htm But I just don't have the time to create a flash image for every single instance, most of which come from dynamically printed PHP pages from a MySQL database. Could I dynamically create a flash image, input the email and tell the flash image to mailto:[EMAIL PROTECTED] Do anyone have a solution? Does one already exist? I agree with Stut that entities are the easiest for bots to handle. As for myself, I use javascript Enkoder -- you can Google it for a way to use it. As for an example of its use, please review: http://sperling.com/contact.php and inspect the source. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
On 2/28/07, tedd [EMAIL PROTECTED] wrote: At 11:22 PM -0500 2/27/07, John Taylor-Johnston wrote: I need an anti-spam-spider measure for my site. Too many addresses are getting raked. In once instance, I created a flash page: http://erasethis.glquebec.org/English/contact.htm But I just don't have the time to create a flash image for every single instance, most of which come from dynamically printed PHP pages from a MySQL database. Could I dynamically create a flash image, input the email and tell the flash image to mailto:[EMAIL PROTECTED] Do anyone have a solution? Does one already exist? I agree with Stut that entities are the easiest for bots to handle. As for myself, I use javascript Enkoder -- you can Google it for a way to use it. As for an example of its use, please review: http://sperling.com/contact.php and inspect the source. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php http://automaticlabs.com/products/enkoderform/ -- http://www.web-buddha.co.uk
Re: [PHP] echo text - anti-spam-spider measure
Can I PHP generate a flash *.swf? How? If not how do I PHP generate a *.png or gif? Jochem Maas wrote: Stut wrote: Of course the best way is to use an image and don't link it. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
On Tue, February 27, 2007 10:22 pm, John Taylor-Johnston wrote: I need an anti-spam-spider measure for my site. Too many addresses are getting raked. In once instance, I created a flash page: http://erasethis.glquebec.org/English/contact.htm But I just don't have the time to create a flash image for every single instance, most of which come from dynamically printed PHP pages from a MySQL database. Could I dynamically create a flash image, input the email and tell the flash image to mailto:[EMAIL PROTECTED] Do anyone have a solution? Does one already exist? http://php.net/ming would let you do exactly that, assuming the Actionscript to send the email will work. My idea was to create a PHP script and output to a png. But I see many problems, including: 1) How do I avoid echoing the email address in the a href= tag? 2) How would I write a png that would be long and high enough? 3) How would the same script display the png? You could obfuscate the address with html encoding, such as: @ - #64; in the HTML @ - %40 in the URL I believe the scrapers/spammers are still not bothering to defeat this trivial exercise because they still get a million hits looking for plain old emails. In short, I can't see far enough how to do this and avoid spider-raking in the HTML or header the content of the image. I would suspect that every email is tied to some database record, like an ID. Provide a FORM which has only the ID in it, and lookup the email, and send the email out yourself from your own server. Yes, you could end up sending a LOT of email. Or not, since you now control the sending with PHP and can refuse to send in whatever scenario you find unacceptable. For example, one of my sites does this but won't send more than 4 emails from any given IP address in one 24-hour period. So a scraper/spammer would need to alter their IP every 4 POST operations, which is really more work than they'll put into it. On a super busy server with millions of users or millions of potential recipients, this would probably be a big deal... On MOST websites, you'll essentially be playing postman for a couple legit emails a day, at most, and not having any problem with scrapers/spammers. -- Some people have a gift link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
You could also use %XX in HEX on the mailto:
On Tue, February 27, 2007 11:09 pm, Casey Chu wrote:
It works. =P I tested it.
Try it here! =P
http://themfund.com/snippets/test.php
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many
addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for
every
single
instance, most of which come from dynamically printed PHP
pages from a
MySQL database.
Could I dynamically create a flash image, input the email and
tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I
see many
problems, including:
1) How do I avoid echoing the email address in the a
href= tag?
2) How would I write a png that would be long and high
enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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Some people have a gift link here.
Know what I want?
I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
Yeah, I get a buck. So?
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Re: [PHP] echo text - anti-spam-spider measure
On Wed, February 28, 2007 1:20 am, Stut wrote: Of all the possible methods, entities are the easiest for bots to handle. They just need to decode the entities. More reliable methods involve using javascript to write out the mailto: tag. Do it in several statements. But even then, some of the smarter spiders will execute simple javascript like that. You can make it better by using onload to execute the javascript which means the spider will need to implement that, which I don't believe they do at the moment. Of course the best way is to use an image and don't link it. If it's just a way for visitors to contact you, use a contact form. You don't expose the email address and can control it a lot better. I'm no expert, but as far as I can tell from my readings on this subject, the reality is that spammers just don't bother to harvest them. Ongoing studies, older studies, newer studies. Everybody knows that the spammers *could* decode HEX or even the JS fairly trivially, but they don't. There are many theories [*] as to why that is, but the empirical evidence is that the obfuscation is very effective at reducing spam dramatically, no matter how silly that seems. * Maybe it's too much low hanging fruit. Maybe they don't want to risk hitting honey-pot emails. Maybe anybody smart enough to obfustcate is too smart to fall for the stupid spam anyway. ... -- Some people have a gift link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
http://themfund.com/snippets/test.php Has %HEX, #entity;, and even a entity version of the hex! On 2/28/07, Richard Lynch [EMAIL PROTECTED] wrote: On Wed, February 28, 2007 1:20 am, Stut wrote: Of all the possible methods, entities are the easiest for bots to handle. They just need to decode the entities. More reliable methods involve using javascript to write out the mailto: tag. Do it in several statements. But even then, some of the smarter spiders will execute simple javascript like that. You can make it better by using onload to execute the javascript which means the spider will need to implement that, which I don't believe they do at the moment. Of course the best way is to use an image and don't link it. If it's just a way for visitors to contact you, use a contact form. You don't expose the email address and can control it a lot better. I'm no expert, but as far as I can tell from my readings on this subject, the reality is that spammers just don't bother to harvest them. Ongoing studies, older studies, newer studies. Everybody knows that the spammers *could* decode HEX or even the JS fairly trivially, but they don't. There are many theories [*] as to why that is, but the empirical evidence is that the obfuscation is very effective at reducing spam dramatically, no matter how silly that seems. * Maybe it's too much low hanging fruit. Maybe they don't want to risk hitting honey-pot emails. Maybe anybody smart enough to obfustcate is too smart to fall for the stupid spam anyway. ... -- Some people have a gift link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every
single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] echo text - anti-spam-spider measure
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every
single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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Re: [PHP] echo text - anti-spam-spider measure
It works. =P I tested it.
Try it here! =P
http://themfund.com/snippets/test.php
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every
single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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[PHP] echo text - anti-spam-spider measure
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
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Re: [PHP] echo text - anti-spam-spider measure
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
--
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Re: [PHP] echo text - anti-spam-spider measure
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every single
instance, most of which come from dynamically printed PHP pages from a
MySQL database.
Could I dynamically create a flash image, input the email and tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I see many
problems, including:
1) How do I avoid echoing the email address in the a href= tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
--
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Re: [PHP] echo text - anti-spam-spider measure
Neat, and thnaks.
How spam-spider-proof is it? I will try this though.
But I will also try it with mailto:; in entities as well.
Thanks!
John
!-- HERE ARE THE ENTITIES --
a
href=mailto:#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;;#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;/a
!--ENTITIES ABOVE!--
Casey Chu wrote:
It works. =P I tested it.
Try it here! =P
http://themfund.com/snippets/test.php
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
I'm not sure with both of your questions. I'm too lazy to try.
Untested: But to encode it, you would use
preg_replace_callback('~([\d\w])~', create_function('$a', 'return
#.ord($a[0]).;;'), $theEmail);
Hopefully that works?
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
How do I encode it? And would the href tag work?
Casey Chu wrote:
^ So put that into a a href tag.
On 2/27/07, Casey Chu [EMAIL PROTECTED] wrote:
Try using Javascript? Or use all entities? For example:
mailto:php-general@lists.php.net would turn into
#109;#97;#105;#108;#116;#111;#58;#112;#104;#112;#45;#103;#101;#110;#101;#114;#97;#108;#64;#108;#105;#115;#116;#115;#46;#112;#104;#112;#46;#110;#101;#116;
On 2/27/07, John Taylor-Johnston
[EMAIL PROTECTED] wrote:
I need an anti-spam-spider measure for my site. Too many
addresses are
getting raked. In once instance, I created a flash page:
http://erasethis.glquebec.org/English/contact.htm
But I just don't have the time to create a flash image for every
single
instance, most of which come from dynamically printed PHP
pages from a
MySQL database.
Could I dynamically create a flash image, input the email and
tell the
flash image to mailto:[EMAIL PROTECTED]
Do anyone have a solution? Does one already exist?
My idea was to create a PHP script and output to a png. But I
see many
problems, including:
1) How do I avoid echoing the email address in the a href=
tag?
2) How would I write a png that would be long and high enough?
3) How would the same script display the png?
In short, I can't see far enough how to do this and avoid
spider-raking
in the HTML or header the content of the image.
Any advice, code or input would be appreciated,
John
a href=?php
#what do I put here?
$mydata-email = [EMAIL PROTECTED];
echo $??;
?img src=?php
|header('Content-type: image/png');|
#How do I display the image?
$mydata-email = [EMAIL PROTECTED];
echo $??;
? width=??? height=???
--
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To unsubscribe, visit: http://www.php.net/unsub.php
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Re: [PHP] echo text - anti-spam-spider measure
John Taylor-Johnston wrote: Neat, and thnaks. How spam-spider-proof is it? I will try this though. But I will also try it with mailto:; in entities as well. Thanks! John !-- HERE ARE THE ENTITIES -- a href=mailto:#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;;#109;#101;@#115;#111;#109;#101;#119;#104;#101;#114;#101;.#99;#111;#109;/a !--ENTITIES ABOVE!-- Of all the possible methods, entities are the easiest for bots to handle. They just need to decode the entities. More reliable methods involve using javascript to write out the mailto: tag. Do it in several statements. But even then, some of the smarter spiders will execute simple javascript like that. You can make it better by using onload to execute the javascript which means the spider will need to implement that, which I don't believe they do at the moment. Of course the best way is to use an image and don't link it. If it's just a way for visitors to contact you, use a contact form. You don't expose the email address and can control it a lot better. -Stut -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
