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Bug #26678 preg_quote doesn't quote forward slashes
Submitted: 2003-12-19 21:58 UTC Modified: 2003-12-20 02:50 UTC
From: gnif at spacevs dot com Assigned:
Status: Not a bug Package: *Regular Expressions
PHP Version: 4.3.2 OS: Debain
Private report: No CVE-ID: None
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From: gnif at spacevs dot com
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 [2003-12-19 21:58 UTC] gnif at spacevs dot com
if you use preg_quote to escape a string with forward slashes in it, it doesn't quote them.

Reproduce code:
$file = 'pages/box/test.php';
echo preg_quote($file);

Expected result:

Actual result:


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 [2003-12-20 02:50 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at


echo preg_quote($file, \"/\");

 [2012-01-12 11:03 UTC] vovan-ve at yandex dot ru
I'm sorry for necroposting.

Why optional value for $delimiter is NULL? I cannot understand, when I must not escape any delimiter? PCRE always requires delimiter for regexp. I think, there are no such situation, when delimiter can be omitted.

OTOH, preg_quote() must not suppose, that delimiter is slash by default due to there are no defaults to delimiter in regexp. In this case, why $delimiter _is_ optional?
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