It has to do with honoring the bravery of soldiers who are facing down an enemy and how the Stars & Stripes fly when one rushes into battle. This is not just some random military tradition. If the American flag is worn on the left arm, the American flag appears “normal” with the stars on the left. If the American flag is worn on the right arm, the American flag will appear “backwards” with the stars on the right. So what’s going on here?!! The difference is the arm that the flag is worn on. The stars appear on the left side of the flag, where we usually see them. The stars appear on the right side of the flag, not the left! But the soldier on the right is wearing a “normal” American flag patch. The one on the left is wearing a BACKWARD American flag patch. The flag is used to skip rules that you don't want to run.Look down below at that picture of two brave soldiers. On to the next rule in the ruleset, which can often result in 'Invalid Use ) because on its own, the flag prepends You will almost always want to use in conjunction with (that is, Status using their symbolic names: temp (default), In addition to response status codes, you may also specify redirect Substitution string is dropped entirely, and rewriting is stopped as if #Reversed flag patterno code#If a status code is outside the redirect range (300-399) then the Necessarily be a redirect (3xx) status code. Using the syntax, with a 302 status code being used byĭefault if none is specified. Will be used to generate the URL sent with the redirect.Īny valid HTTP response status code may be specified, Otherwise, the current protocol, servername, and port number If a fully-qualified URL is specified (that is, including Use of the flag causes a HTTP redirect to be issued to the browser. Note that the PT flag is implied in per-directory Rewriting will be stopped in order to pass the request to Ignored, resulting in a 'File not found' error being returned. Omission of the flag in this case will cause the Alias to be URL mapping, so that location-based mappings, such as Alias, Redirect, or ScriptAlias, for example, might have aįor /icons, and have a RewriteRule pointing there, you should Use of the flag causes the result of the RewriteRule to be passed back through The use of the flag causes it to be treated The target (or substitution string) in a RewriteRule is assumed to be aįile path, by default. # Be willing to replace 1 character in each pass of the loop Iterations can be specified by adding to the N flag. In 2.4.8 and later, this module returns an error after 32,000 iterations to Pattern still matches (i.e., while the URI still contains anĪ), perform this substitution (i.e., replace the You can think of this as a while loop: While this So until there are no more As to be replaced. Will replace A with B everywhere in a request, and will continue doing The flag could be used, for example, if you wished to replace aĬertain string or letter repeatedly in a request. With extreme caution, as it may result in loop. The result of the ruleset so far as a starting point. The flag causes the ruleset to start over again from the top, using When the backend may break if presented with an unescaped URL.Īn alternative to this flag is using a RewriteCond to capture against %" "!=/index.php" This escaping is particularly necessary in a proxy situation, Particular example to work, as httpd does not allow encoded slashes in URLs, and Note that you may also need to set AllowEncodedSlashes to On to get this With the B flag set on this same rule, the parameters are re-encodedīefore being passed on to the output URL, resulting in a correct mapping to Search.php?term=x%20&y%2Fz=, which is not what was intended. Isn't a valid URL, and so would be encoded as Without the Bįlag, this rewrite rule will map to 'search.php?term=x & y/z', which Given a search term of 'x & y/z', a browser will encode it as For example, consider the rule: RewriteRule "^search/(.*)$" "/search.php?term=$1" Using the B flag, non-alphanumeric characters in backreferences So backreferences are unescaped at the time they are applied. Mod_rewrite has to unescape URLs before mapping them, Note: The spaceĬharacter can be used in the list of characters to escape, but it cannot be In 2.4.26 and later, you can limit the escaping to specific characters The flag instructs RewriteRule to escape non-alphanumericĬharacters before applying the transformation.
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