RE: [PHP] eregi_replace() function in a script
The script works fine but I have a question with the following line: $Pattern=(http://)([^[:space:]]+) ([[:alnum:]\.,-?/=]); // The variable $Pattern is declared with three groupings. My question: If the user inadvertantly inputs a *space* _after_ the http:// grouping and _before_ the www. grouping my understanding is that would not be valid from the $Pattern match due to: ([^[:space:]]+) .. Correct? Yes, that's correct. That piece of the pattern matches anything that's not a space, one or more times. I tried the script by putting a space before the URL and the PHP still processes the data with no error. A space before everything is fine, as the pattern will match the remainder of the string. If you put a ^ at the very beginning of the pattern, that'll mean the beginning of the string must be followed by (http), so then a space will cause the patter match to fail. ---John Holmes... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] eregi_replace() function in a script
John W. Holmes: Yes, that's correct. That piece of the pattern matches anything that's not a space, one or more times. I tried the script by putting a space before the URL and the PHP still processes the data with no error. A space before everything is fine, as the pattern will match the remainder of the string. If you put a ^ at the very beginning of the pattern, that'll mean the beginning of the string must be followed by (http), so then a space will cause the patter match to fail. ... Thanks for the reply John. I still don't understand the explanation. For instance, let's say I put _absolutely nothing_ in the URL textbox and then hit submit - the PHP still processes _without_ an error. It says: Your submission -- -- has been received! I would've thought the eregi_replace() function would've validated an entry with no characters. If you get a chance would you please try it out. Thanks again for your time. TR -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] eregi_replace() function in a script
For instance, let's say I put _absolutely nothing_ in the URL textbox and then hit submit - the PHP still processes _without_ an error. It says: Your submission -- -- has been received! I would've thought the eregi_replace() function would've validated an entry with no characters. Well, whether it causes an error not depends on your code. That's just the pattern you showed. It may not match anything, so nothing gets replaced with eregi_replace() and hence no active link is created, but it may not necessarily cause an error. Can you show me some of the code in context, with the pattern you showed earlier and how eregi_replace is being used? Thanks. ---John Holmes... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] eregi_replace() function in a script
Well, whether it causes an error not depends on your code. That's just
the pattern you showed. It may not match anything, so nothing gets
replaced with eregi_replace() and hence no active link is created, but
it may not necessarily cause an error.
Can you show me some of the code in context, with the pattern you showed
earlier and how eregi_replace is being used? Thanks.
---John Holmes...
..
Sure.
BTW, here's a screenshot of the form and the result at:
www.gonefishingguideservice.com/php.htm
For a test, I put in a few spaces and then s and then more spaces and
then o and then more spaces and then s and then I hit submit and the
script processed without an error.
So, I don't see where the eregi_replace() pattern matching is coming into
play.
Thank you.
TR
...
Here is Larry Ullman's PHP script on page 130 -131:
//this is the html form
HTML
HEAD
/HEAD
BODY
FORM METHOD=POST ACTION=1201.php
First NameINPUT TYPE=TEXT NAME=Array[FirstName] SIZE=20BR
Last Name INPUT TYPE=TEXT NAME=Array[LastName] SIZE=40BR
URL INPUT TYPE=TEXT NAME=Array[URL] SIZE=60BR
DescriptionTEXTAREA NAME=Array[Description] ROWS=5
COLS=40/TEXTAREABR
INPUT TYPE=SUBMIT NAME=SUBMIT VALUE=Submit!
/FORM
/BODY
/HTML
..
//this is the script called 1201.php which receives the data from the form.
HTML
HEAD
TITLEUsing Regular Expressions/TITLE
/HEAD
BODY
?php
if (($Array[FirstName]) AND ($Array[LastName]))
{
$Array[Name] = $Array[FirstName] . . $Array[LastName];
}
else
{print (Please enter your first and last names.BR\n);
}
$Pattern = (http://)?([^[:space:]]+)([[:alnum:]\.,-_?/=]);
$Replace = a href=\http://\\2\\3\; target=\_new\\\2\\3/a;
$Array[URL] = eregi_replace($Pattern, $Replace, $Array[URL]);
print (Your submission--$Array[URL]--has been received!BR\n);
?
/BODY
/HTML
---
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RE: [PHP] eregi_replace() function in a script
$Pattern = (http://)?([^[:space:]]+)([[:alnum:]\.,-_?/=]);
$Replace = a href=\http://\\2\\3\; target=\_new\\\2\\3/a;
$Array[URL] = eregi_replace($Pattern, $Replace, $Array[URL]);
print (Your submission--$Array[URL]--has been received!BR\n);
That does no checking or validation at all. It simply tries to replace a
pattern with another one. If the pattern isn't matched, then the
original string is returned unchanged.
If you want to validate the entry, then check to see if string has
changed at all.
$Pattern = (http://)?([^[:space:]]+)([[:alnum:]\.,-_?/=]);
$Replace = a href=\http://\\2\\3\; target=\_new\\\2\\3/a;
$temp = $Array[URL];
$Array[URL] = eregi_replace($Pattern, $Replace, $Array[URL]);
if(strcmp($temp,$Array[URL])==0)
{ echo You did not enter a good URL address.; }
---John Holmes...
--
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Re: [PHP] eregi_replace() function in a script
Holmes: That's just the pattern you showed. It may not match anything, so nothing gets replaced with eregi_replace() and hence no active link is created, but it may not necessarily cause an error. . Right. The pattern does not match anything in the input string of $Array[URL] so the A HREF=/A never appears on output. Thank you. TR -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
