Serving web pages - Revision history

Shawn at 04:21, 2 February 2015

2015-02-02T04:21:29Z

← Older revision		Revision as of 21:21, 1 February 2015
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	====Examples of Apache directives====		====Examples of Apache directives====
			;Prevent anyone from reading the .htaccess file(s).
	<Files .htaccess>		<Files .htaccess>
	order allow,deny		order allow,deny
	deny from all		deny from all
	</Files>		</Files>
	~~Prevents anyone~~ from ~~reading the .htaccess file(s)~~.
			;Prevent certain IPs or ranges of IPs from accessing documents.
	order allow,deny		order allow,deny
	deny from 59.92.4.185		deny from 59.92.4.185
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	Prevents anyone from 59.92.4.185, addresses that start with 66.225.201, or addresses that match the first 20 bits of 69.80.96.0.		Prevents anyone from 59.92.4.185, addresses that start with 66.225.201, or addresses that match the first 20 bits of 69.80.96.0.

			;Set a custom 403 error message.
	ErrorDocument 403 "Sorry, requests from your IP address are forbidden		ErrorDocument 403 "Sorry, requests from your IP address are forbidden
	Shows the phrase after " when access is denied to a page.		Shows the phrase after " when access is denied to a page.

			;Set a custom 403 document.
	ErrorDocument 403 /errors/403.html		ErrorDocument 403 /errors/403.html
	Replies with the 403.html file when access is denied to a page.		Replies with the 403.html file when access is denied to a page.

			;Set a custom 404 document.
	ErrorDocument 404 /errors/404.html		ErrorDocument 404 /errors/404.html
	Replies with the 404.html file when the request can't be found.		Replies with the 404.html file when the request can't be found.

			;Allow rejects to see 403 file.
	order allow,deny		order allow,deny
	allow from all		allow from all

Shawn: /* Getting funny characters right */ adding link to utf-8 page

2013-06-29T19:37:24Z

Getting funny characters right: adding link to utf-8 page

← Older revision		Revision as of 12:37, 29 June 2013
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	Now that I'm starting, like many, to use UTF-8 encoded data, I need to make sure that PHP connects to MySQL using a UTF-8 pipe. That can be accomplished with a single command in PHP scripts:		Now that I'm starting, like many, to use UTF-8 encoded data, I need to make sure that PHP connects to MySQL using a UTF-8 pipe. That can be accomplished with a single command in PHP scripts:
	mysql_set_charset("utf8");		mysql_set_charset("utf8");

			See [[Switching a web site to UTF-8]] for much more.

	==Processing form input==		==Processing form input==

Shawn: /* See also */

2013-06-26T18:11:31Z

Shawn at 17:11, 3 April 2013

2013-04-03T17:11:45Z

← Older revision		Revision as of 10:11, 3 April 2013
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	See the section on Perl-Compatible Regular Expressions in the PHP manual: http://www.php.net/manual/en/book.pcre.php		See the section on Perl-Compatible Regular Expressions in the PHP manual: http://www.php.net/manual/en/book.pcre.php

	[[Category:Internet]]		==See also==
			[[Javascript recipes]]

			[[Category:Internet]][[Category:Programming]]

Shawn: fixing possible punctuation after end of URL

2012-05-18T01:59:12Z

fixing possible punctuation after end of URL

← Older revision		Revision as of 18:59, 17 May 2012
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	===Putting tags around links automatically===		===Putting tags around links automatically===
	I have forms where people write stories that usually include web links. If I want the links to be clickable, then I usually write <a> tags around the link, repeating the link in the href field. Now I have a string replace function in PHP that will do that automatically:		I have forms where people write stories that usually include web links. If I want the links to be clickable, then I usually write <a> tags around the link, repeating the link in the href field. Now I have a string replace function in PHP that will do that automatically:
	preg_replace('~[^>"](https?://\S+)~', '<a href="$1">$1</a>', $text); //$text being the input text		$html_links = preg_replace('~[^>"](https?://\S+[0-9a-zA-Z/&\?])~', '<a href="$1">$1</a>', $text);//$text being the input text
	;Explaining the function		;Explaining the function
	*<strong>preg_replace</strong> searches for the substrings of the third argument ($text here) that match the first argument, replacing them with the second argument.		*<strong>[http://www.php.net/manual/en/function.preg-replace.php preg_replace]</strong> searches for the substrings of the third argument ($text here) that match the first argument, replacing them with the second argument.
	*<strong>~...~</strong>, the search string starts and ends with tildes, just to delimit the beginning and end of the regular expression...They are allowed to be most any symbol, preferably one we're not using in the search string. Slashes and quotes are often used, but we have those two symbols in our search string itself, so I chose tildes.		*<strong>~...~</strong>, the search string starts and ends with tildes, just to delimit the beginning and end of the regular expression...They are allowed to be most any symbol, preferably one we're not using in the search string. Slashes and quotes are often used, but we have those two symbols in our search string itself, so I chose tildes.
	*<strong>[^>"]</strong> means "anything but greater than or double-quotes."We make sure we're not finding links that already appear right after quotation marks or greater-than symbols, since that would mean the link already is part of a tag.		*<strong>[^>"]</strong> means "anything but greater than or double-quotes."We make sure we're not finding links that already appear right after quotation marks or greater-than symbols, since that would mean the link already is part of a tag.
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	*<strong>://</strong>Then must follow a colon and two forward slashes.		*<strong>://</strong>Then must follow a colon and two forward slashes.
	*<strong>\S+</strong>Then can follow any number of non-whitespace characters, signified by "\S", the plus sign meaning one or more of whatever precedes itself.		*<strong>\S+</strong>Then can follow any number of non-whitespace characters, signified by "\S", the plus sign meaning one or more of whatever precedes itself.
	~~;Problems with this function~~		*<strong>[0-9a-zA-Z/&\?]</strong> The URL we find must end in a number, a letter, a slash, an ampersand, or a question mark. We don't include periods or other punctuation because someone might enter a URL followed by punctuation that isn't part of the URL. Because the question mark has a special meaning in regular expressions, we "escape" this one with the escape symbol, a backwards slash. Links could be like any of the following:
	~~:A period being a non~~-~~whitespace character, if the writer puts a period after the link, as in "http:~~//~~energyteachers.org."~~ we ~~will catch that period~~ in ~~our search~~, ~~and the link will fail. We should consider making the last character either~~ a letter, a slash, ~~a number~~, a question mark, ~~or an ampersand~~, ~~because links~~ could be like any of the following:		**http://energyteachers.org
	::http://energyteachers.org		**http://energyteachers.org/
	::http://energyteachers.org/		**http://energyteachers.org/workshopdetail.php?workshop_id=470
	::http://energyteachers.org/workshopdetail.php?workshop_id=470		**http://energyteachers.org/workshopdetail.php?
	::http://energyteachers.org/workshopdetail.php?		**http://energyteachers.org/workshopdetail.php?workshop_id=470&
	::http://energyteachers.org/workshopdetail.php?workshop_id=470&		See the section on Perl-Compatible Regular Expressions in the PHP manual: http://www.php.net/manual/en/book.pcre.php

	[[Category:Internet]]		[[Category:Internet]]

Shawn at 01:40, 18 May 2012

2012-05-18T01:40:30Z

@@ Line 32: / Line 32: @@
 Now that I'm starting, like many, to use UTF-8 encoded data, I need to make sure that PHP connects to MySQL using a UTF-8 pipe. That can be accomplished with a single command in PHP scripts:
   mysql_set_charset("utf8");
 [[Category:Internet]]

Shawn at 20:56, 24 February 2012

2012-02-24T20:56:14Z

← Older revision		Revision as of 13:56, 24 February 2012
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	allow from all		allow from all
	Put this in the folder where the 403 file is, and it allows even banned IPs access to the 403 error document (and any other files that are in that folder; better add the Files directive also).		Put this in the folder where the 403 file is, and it allows even banned IPs access to the 403 error document (and any other files that are in that folder; better add the Files directive also).

			==Getting funny characters right==
			Now that I'm starting, like many, to use UTF-8 encoded data, I need to make sure that PHP connects to MySQL using a UTF-8 pipe. That can be accomplished with a single command in PHP scripts:
			mysql_set_charset("utf8");

	[[Category:Internet]]		[[Category:Internet]]

Shawn: /* Examples */

2011-02-08T05:01:30Z

Examples

← Older revision		Revision as of 22:01, 7 February 2011
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	An .htaccess file in a directory on a server tells the server how to handle specified requests or requests from specified internet addresses.		An .htaccess file in a directory on a server tells the server how to handle specified requests or requests from specified internet addresses.

	====Examples====		====Examples of Apache directives====
	<Files .htaccess>		<Files .htaccess>
	order allow,deny		order allow,deny
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	Shows the phrase after " when access is denied to a page.		Shows the phrase after " when access is denied to a page.

	ErrorDocument 404 /errors/~~eto404~~.html		ErrorDocument 403 /errors/403.html
	Replies with the ~~eto404~~.html file when the request can't be found.		Replies with the 403.html file when access is denied to a page.

			ErrorDocument 404 /errors/404.html
			Replies with the 404.html file when the request can't be found.

			order allow,deny
			allow from all
			Put this in the folder where the 403 file is, and it allows even banned IPs access to the 403 error document (and any other files that are in that folder; better add the Files directive also).

	[[Category:Internet]]		[[Category:Internet]]

Shawn: Created page with '==Stopping spam and hackers== ===htaccess=== An .htaccess file in a directory on a server tells the server how to handle specified requests or requests from specified internet ad…'

2011-02-08T04:39:59Z

Created page with '==Stopping spam and hackers== ===htaccess=== An .htaccess file in a directory on a server tells the server how to handle specified requests or requests from specified internet ad…'

New page

==Stopping spam and hackers==
===htaccess===
An .htaccess file in a directory on a server tells the server how to handle specified requests or requests from specified internet addresses.

====Examples====
<Files .htaccess>
order allow,deny
deny from all
</Files>
Prevents anyone from reading the .htaccess file(s).
order allow,deny
deny from 59.92.4.185
deny from 66.225.201
deny from 69.80.96.0/20
allow from all
Prevents anyone from 59.92.4.185, addresses that start with 66.225.201, or addresses that match the first 20 bits of 69.80.96.0.

ErrorDocument 403 "Sorry, requests from your IP address are forbidden
Shows the phrase after " when access is denied to a page.

ErrorDocument 404 /errors/eto404.html
Replies with the eto404.html file when the request can't be found.

[[Category:Internet]]

← Older revision		Revision as of 11:11, 26 June 2013
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	==See also==		==See also==
	[[Javascript recipes]]		[[Javascript recipes]]

			[[Webmaster recipes]]

	[[Category:Internet]][[Category:Programming]]		[[Category:Internet]][[Category:Programming]]