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Hi,
I am trying to use preg_replace to take out all occurances of PHP code
after reading (fread()) the contents of a PHP file. The code I am using
is:
$html = preg_replace("<?php*?>", "", $html);
Unfortuntely it is not working and giving the following error:
Warning: preg_replace(): Nothing to repeat for offset 0 in
C:/apache/...
Can someone please try this out and see what they get. How can I get
this to work?
Cheers
Burnsy
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Do you get the same error if you switch out <?php*?> with something
simple, as a test?
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> $html = preg_replace("<?php*?>", "", $html);
To my basic knowledge, that expression should match a string with
'<?php' at the start, and '?>' at the end with any collection of
characters inbetween (represented by the asterix - * - character). Do you get the same error if you switch out <?php*?> with something
simple, as a test?
I did try and switch the '<?php*?>' part with just something like
'<h1>' and it seemed to work. | |
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First, PCRE is interpreting the brackets as brackets for the
expression. Second, the question mark is a special character in RegEx
thus needs to be escaped. Third, to match any character zero or many
times you need ".*" and not just the asterisk.
The correct expression is "/<\?php.*?\?>/s". The s modifier is
necessary for matching across lines.
If this is intended as a security check of sort, then you need a lot
more code than a call to preg_replace().
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>I am trying to use preg_replace to take out all occurances of PHP code after reading (fread()) the contents of a PHP file. The code I am using
is:
$html = preg_replace("<?php*?>", "", $html);
What characters when they are intended to be literal have to be
backslashed? This at least includes ? and *. Not sure about <>.
What does the * character mean in a regular expression? 0 or more
repetitions of what preceeds it. This is *NOT* the same as a
filename wildcard. p* matches a whole bunch of p's. As a filename
wildcard, it matches something that begins with p followed by
something else.
Offhand I'm having trouble finding documentation on the particular
flavor of regular expressions PHP uses.
Gordon L. Burditt | |
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On 2 Sep 2005 14:46:41 -0700, bi******@yahoo.co.uk wrote: $html = preg_replace("<?php*?>", "", $html);
To my basic knowledge, that expression should match a string with
'<?php' at the start, and '?>' at the end with any collection of
characters inbetween (represented by the asterix - * - character).
It doesn't match that, it's an invalid pattern. Have you read:
http://uk2.php.net/manual/en/ref.pcre.php
http://uk2.php.net/manual/en/referen...ern.syntax.php
http://uk2.php.net/manual/en/referen....modifiers.php
Even if you'd surrounded it with delimiters, e.g. you'd used
/<?php*?>/
that would match (courtesy of the YAPE::Regex::Explain Perl module):
----------------------------------------------------------------------
<? '<' (optional (matching the most amount
possible))
----------------------------------------------------------------------
ph 'ph'
----------------------------------------------------------------------
p*? 'p' (0 or more times (matching the least
amount possible))
---------------------------------------------------------------------- '>'
---------------------------------------------------------------------- Do you get the same error if you switch out <?php*?> with something
simple, as a test?
I did try and switch the '<?php*?>' part with just something like
'<h1>' and it seemed to work.
But this doesn't match "<h1>" which it appears you might be expecting, it
matches "h1". Read http://uk2.php.net/manual/en/ref.pcre.php for why.
You may want to look at http://www.weitz.de/regex-coach/ which I've seen
mentioned a few times, and looks pretty useful for learning regexes from the
description and screenshot.
--
Andy Hassall :: an**@andyh.co.uk :: http://www.andyh.co.uk http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool | |
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| bi******@yahoo.co.uk wrote: I am trying to use preg_replace to take out all occurances of PHP code
after reading (fread()) the contents of a PHP file. The code I am using
is:
$html = preg_replace("<?php*?>", "", $html);
<?php
// ?>
?>
You're fired.
--
Jock | |
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John Dunlop wrote: <?php
// ?>
?>
Make that
<?php
/* ?> */
?>
You're still fired.
--
Jock | |
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The block would be removed correctly if the greedy matching isn't
turned off.
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| bi******@yahoo.co.uk wrote: Hi,
I am trying to use preg_replace to take out all occurances of PHP code
after reading (fread()) the contents of a PHP file. The code I am using
is:
<snip>
Are you aware of <http://in2.php.net/strip_tags> and
<http://in2.php.net/tokenizer> ?
--
<?php echo 'Just another PHP saint'; ?>
Email: rrjanbiah-at-Y!com Blog: http://rajeshanbiah.blogspot.com/ | |
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Chung Leong wrote: The block would be removed correctly if the greedy matching isn't
turned off.
What greedy matching?
Anyway, on or off, it doesn't matter.
<?php
?>
foo
<?php
?>
He never got the job.
--
Jock | |
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In article <d6***************@newsfe7-win.ntli.net>,
John Dunlop <us*********@john.dunlop.name> wrote: Chung Leong wrote:
The block would be removed correctly if the greedy matching isn't
turned off.
What greedy matching?
Anyway, on or off, it doesn't matter.
<?php
?>
foo
<?php
?>
He never got the job.
#!/usr/bin/php
<?
$strings = array(
"Hello <?php print 'Miss'; ?> World",
"Hello <?php print 'World'; ?>",
"<?php echo 'foo'; ?>Hello World <?php echo 'bar'; ?>",
);
foreach (preg_replace("/<\?php.*?\?>/si", "", $strings) as $line)
print "$line\n";
?>
OUTPUT:
Hello World
Hello
Hello World
--
Sandman[.net] | |
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Sandman wrote: #!/usr/bin/php
<?
$strings = array(
"Hello <?php print 'Miss'; ?> World",
"Hello <?php print 'World'; ?>",
"<?php echo 'foo'; ?>Hello World <?php echo 'bar'; ?>",
);
foreach (preg_replace("/<\?php.*?\?>/si", "", $strings) as $line)
print "$line\n";
?>
OUTPUT:
Hello World
Hello
Hello World
I can't reread this subthread for you.
--
Jock | |
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In article <1X***************@newsfe7-win.ntli.net>,
John Dunlop <us*********@john.dunlop.name> wrote: Sandman wrote:
#!/usr/bin/php
<?
$strings = array(
"Hello <?php print 'Miss'; ?> World",
"Hello <?php print 'World'; ?>",
"<?php echo 'foo'; ?>Hello World <?php echo 'bar'; ?>",
);
foreach (preg_replace("/<\?php.*?\?>/si", "", $strings) as $line)
print "$line\n";
?>
OUTPUT:
Hello World
Hello
Hello World
I can't reread this subthread for you.
I wouldn't have expected such ability from you, no.
--
Sandman[.net] | | This discussion thread is closed Replies have been disabled for this discussion. | |  Question stats - viewed: 2590
- replies: 16
- date asked: Sep 2 '05
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