[pmwiki-users] Fixme icon
5ko at 5ko.fr
Mon Dec 2 11:16:27 PST 2019
On 02/12/2019 14:28, Robert Riebisch wrote:
> The following works for me, but I'm not sure about the number of
> backslashes in: \\(:fixme:\\)
> Markup('fixme', 'directives', '/\\(:fixme:\\)/i',
> Does the number depend on the usage of ' or "?
> I had look at "scripts/stdmarkup.php", but still don't have a clue.
Your backslashes are fine.
If you have one literal backslash in a string, like you did to escape
parentheses in a regular expression:
* in single quotes you can use both a single backslash (unless it is the
last character of the quoted string, or unless the next character is a
single quote, a digit, or "x" followed by a digit)
** OR you can safely double the backslash like you did
* in double quotes, you may be able to use a single backslash unless the
next character is among nrtevf0\$" or x or u followed by digits, and it
is not the last character of the quoted string,
** OR you can safely double the backslash.
As you see, in all cases, single or double quotes, with any following
character, you can safely double the literal backslash, so this is what
For example, a common error in PHP configuration on Dos/Windows
(including PmWiki) is when the path to something is enclosed in double
quotes and the backslashes are not escaped (doubled) like:
$Something = "C:\LAMPP\htdocs\test\new\fixme.gif";
Both the \t, the \n and the \f will be expanded to something and will
break the path.
See https://www.php.net/manual/en/language.types.string.php for more
BTW there are 2 more types of strings, HEREDOC and NOWDOC but I suggest
reading the PHP documentation and the changelog if you use them because
there are changes from one PHP version to another.
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