ID: 11540
User Update by: [EMAIL PROTECTED]
Old-Status: Open
Status: Closed
Bug Type: *Regular Expressions
Operating system: Windows
PHP Version: 4.0.5
Description: Backslash and regular expressions
Sorry my added comment is silly... I just understood why I have to put "\\\\" in my
source code and why it is enough that preg_quote generates two backslashes...
So there is no bug at all.
Previous Comments:
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[2001-06-20 03:02:45] [EMAIL PROTECTED]
I am told that I should put four backslahes in my pattern to make it match a single
backslash.
This is good in static patterns. But my pattern is a variable string which I want to
put in good pattern format using the fonction preg_quote.
But this function transforms one backslash in only two backshlashes (and not 4 !)...
Thus, the only way to make my program work is to apply two times this function
preg_quote. This works, but this is not very nice, is it ?
So, isn't there a bug in function preg_quote ?
Thanks in advance,
Olivier Roos
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[2001-06-18 11:53:03] [EMAIL PROTECTED]
Hello,
I have to write a program which replaces backslashes by slashes into HTML code. I
would like to do this using regular expressions.
Unfortunately, there may be a problem in pattern matching as PHP does not seem to work
properly as soon as I add some backslashes in my patterns...
Here is a small example which illustrates the problem:
<?
$test = "X\X"; // $test is a string containing a backslash
echo $test."n";
echo preg_quote($test)."n";
echo preg_match("/X\X/", $test)."n";
?>
The output of this program is the following:
XX
X\X
0
The '0' means that the preg_match failed... But the pattern of this preg_match was the
string $test quoted by preg_quote to become a valid pattern... (as you can see on
second line of the output).
So this preg_match should output '1', shouldn't it ??
Thanks in advance for any help or advice,
Olivier Roos
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Full Bug description available at: http://bugs.php.net/?id=11540
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