Regular Expression?

**kovik** · Oct 4 '10, 01:12 AM

That depends. What elements of this "pattern" are static. Which parts are dynamic? and what are the restrictions you are placing on valid matches vs. invalid matches?

**abhishek1234321** · Oct 4 '10, 12:33 PM

In the coded string, all the html is static only the data between the tags is dynamic... that is it changes for different USN(University seat number) like 1rn08cs006 is mine.. :)

the tags like <TR><TD width="513"><B> </td></tr></table></TD></TR> are static... :)

**kovik** · Oct 4 '10, 12:38 PM

Then just grab the link as a static portion with that one part encoded to be dynamic.

Code:

preg_match_all('~(http://results.vtu.ac.in/default.php?rid=[^&"\']+&submit=SUBMIT)~s', $your_data, $results);
print_r($results);

**abhishek1234321** · Oct 4 '10, 12:49 PM

no no.. u didn't undertstand my question... i told the html rendered is dynamic... i need to match the html rendered by that link... i've a variable say $x which stores teh html content of that link like...

Code:

$x=file_get_contents(THE LINK)

now i need to match the below pattern...

Code:

   <TR>
   
                             <TD width="513">
  
 <B>ABHISHEK S JAIN (1rn08cs006) </B><br><br><br><br><hr><table><tr><td><b>Semester:</b></td><td><b>4</b></td><td></td><td> &nbsp;&nbsp;&nbsp;&nbsp;<b> Result:&nbsp;&nbsp;FIRST CLASS WITH DISTINCTION </b></td></tr></table><hr><table><tr><td width=250>Subject</td><td width=60 align=center>External </td><td width=60 align=center>Internal</td><td align=center width=60>Total</td><td align=center width=60>Result</td></tr><br><tr><td width=250><i>Engineering Mathematics - IV (06MAT41)</i></td><td width=60 align=center>86</td><td width=60 align=center>25</td><td width=60 align=center>111</td><td  width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Graph Theory and Combinatorics (06CS42)</i></td><td width=60 align=center>75</td><td width=60 align=center>20</td><td width=60 align=center>95</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Analysis and Design of Algorithms (06CS43)</i></td><td width=60 align=center>70</td><td width=60 align=center>20</td><td width=60 align=center>90</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Object Oriented Programming with C++ (06CS44)</i></td><td width=60 align=center>49</td><td width=60 align=center>22</td><td width=60 align=center>71</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Microprocessors (06CS45)</i></td><td width=60 align=center>66</td><td width=60 align=center>22</td><td width=60 align=center>88</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Computer Organization (06CS46)</i></td><td width=60 align=center>44</td><td width=60 align=center>22</td><td width=60 align=center>66</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Object Oriented Programming Lab (06CSL47)</i></td><td width=60 align=center>44</td><td width=60 align=center>24</td><td width=60 align=center>68</td><td width=60 align=center><b>P</b></td></tr><tr><td width=250><i>Microprocessors Lab (06CSL48)</i></td><td width=60 align=center>42</td><td width=60 align=center>20</td><td width=60 align=center>62</td><td width=60 align=center><b>P</b></td></tr></table><br><br><table><tr><td></td><td></td><td>Total Marks:</td><td> 651 &nbsp;&nbsp;&nbsp; </td></tr></table>                              </TD></TR>

i need a pattern to match the above html :)

**kovik** · Oct 4 '10, 12:52 PM

You need to match the HTML rendered by the link...? As in, you need to virtually click the link and get the resulting page? At no point did you even hint at that...

If that is what you are after, you will need to utilize file_get_conten ts() or cURL.

**abhishek1234321** · Oct 4 '10, 12:56 PM

i'm sorry i didn't mention.. but after that can u tell me what my be the pattern

Code:

$pattern = "/<B>(.*?)(?= <\/td><\/tr><\/table>.*<\/TD><\/TR>)/im";

i m using the above pattern right now.. but i m not able to match these lines

Code:

 <TR>
                              <TD width="513">

**kovik** · Oct 4 '10, 12:59 PM

I'm not sure what you are trying to do, but the only reason to use multi-line mode (m) is if you are matching the beginning and end of lines. You probably want to use single-line mode (s) which makes the dot (.) match newlines, treating your data as a single line.

**abhishek1234321** · Oct 4 '10, 01:03 PM

oh u mean to say i should use (s) and dot(.) can be used to match multi lines too..? am i correct? :).. so finally the pattern becomes

Code:

$pattern = "/<TR>(.)<TD width="513">(.)<B>(.*?)(?= <\/td><\/tr><\/table>.*<\/TD><\/TR>)/is";

**kovik** · Oct 4 '10, 01:04 PM

Haha, not exactly. A dot on it's own only matches a single character. It's the same as the usage of dots in your first regex.

**abhishek1234321** · Oct 4 '10, 01:06 PM

can u please provide me with the final regex? :)

**abhishek1234321** · Oct 4 '10, 01:10 PM

hey thanks a lot man.. i got it working!!!

**kovik** · Oct 4 '10, 01:11 PM

No problem.

Regular Expression?

Regular Expression?

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