Programming Forums > Web Development and Design > PHP

ktsirig · Feb 12th, 2006, 3:50 AM

Hi all!
I have a preformatted text where I want to run a regular expression. The text is something like :
[PHP]
codeA
*->refbrjkgbrkjgbrjukbgreukgbrukgbegurebgrek

klgfhnrjkgnrjgbrejkgbrjkbegjkrbbrkegbrejb

reopjgporejytopjrotjrphjpojprhjtporhtjrph

codeB
*->4p3tuop43tu4optj4rofdgfnreklfnrklefnrkenr

ropeturojgorejgeolgjrelgjrlgrhelkghelghlg

regjrejgoejeojigjreilgjelgjrilgjlerjgelrj
[/PHP]

From each 'paragraph', I want to match the part under codeA and codeB
The problem I have is with matching the newline characters. I write :
preg_match('/code.{1}\n\*->(.*)\ncode./')
but it doesn't match... I think the problem is the newlines

DaWei · Feb 12th, 2006, 8:13 AM

What I'm going to say may be wrong. I can't lay my hands immediately on the reference I have in mind. The newline may not be interpreted as such inside single quotes.

ktsirig · Feb 12th, 2006, 8:20 AM

DaWei, thanx for the post...
I tried using double quotes, but doesn't do anything... and the weird thing is that, for instance, spaces are matced with \s but why newlines don't????
I can't figure it out.....

Polyphemus_ · Feb 12th, 2006, 8:38 AM

Maybe you have to use \r\n, instead of only \n. Absolutely not sure, though.

DaWei · Feb 12th, 2006, 8:53 AM

Your particular text, as represented in the post box, does indeed contain both a return and a newline:

(Toggle Plain Text)

Hex/Ascii
20 63 6f 64 65 41 0d 0a 2a 2d 3e 72.... (20 is a space)
    c  o  d  e  A \r \n  *  -  >  r ....

DaWei · Feb 12th, 2006, 10:16 AM

I don't know how you are producing your string, as shown in the code box of your post. If you produce it with the line breaks as actual codes rather than some unpredictable presentation that varies from display device to display device and system to system, I think you'll find success. In other words,

(Toggle Plain Text)

"codeA\r\n*->refbrjkgbrkjgbrjukbgreukgbrukgbegurebgrek\r\nklgfhnrjkgnrjgbrejkgbrjkbegjkrbbrkegbrejb\r\nreopjgporejytopjrotjrphjpojprhjtporhtjrph"

In the post there are spaces shown (such as after 'nklgfh' and before 'nrjk') that are not present in the actual material.

Feb 12th, 2006, 3:50 AM	#1
ktsirig Programmer Join Date: Oct 2005 Posts: 54 Rep Power: 3	PHP & newlines Regular expressions Hi all! I have a preformatted text where I want to run a regular expression. The text is something like : [PHP] codeA ->refbrjkgbrkjgbrjukbgreukgbrukgbegurebgrek klgfhnrjkgnrjgbrejkgbrjkbegjkrbbrkegbrejb reopjgporejytopjrotjrphjpojprhjtporhtjrph codeB ->4p3tuop43tu4optj4rofdgfnreklfnrklefnrkenr ropeturojgorejgeolgjrelgjrlgrhelkghelghlg regjrejgoejeojigjreilgjelgjrilgjlerjgelrj [/PHP] From each 'paragraph', I want to match the part under codeA and codeB The problem I have is with matching the newline characters. I write : preg_match('/code.{1}\n\->(.)\ncode./') but it doesn't match... I think the problem is the newlines

Feb 12th, 2006, 8:13 AM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	What I'm going to say may be wrong. I can't lay my hands immediately on the reference I have in mind. The newline may not be interpreted as such inside single quotes. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Feb 12th, 2006, 8:53 AM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Your particular text, as represented in the post box, does indeed contain both a return and a newline: (Toggle Plain Text) Hex/Ascii 20 63 6f 64 65 41 0d 0a 2a 2d 3e 72.... (20 is a space) c o d e A \r \n * - > r .... Hex/Ascii 20 63 6f 64 65 41 0d 0a 2a 2d 3e 72.... (20 is a space) c o d e A \r \n * - > r .... __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Feb 12th, 2006, 10:16 AM	#6
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	I don't know how you are producing your string, as shown in the code box of your post. If you produce it with the line breaks as actual codes rather than some unpredictable presentation that varies from display device to display device and system to system, I think you'll find success. In other words, (Toggle Plain Text) "codeA\r\n->refbrjkgbrkjgbrjukbgreukgbrukgbegurebgrek\r\nklgfhnrjkgnrjgbrejkgbrjkbegjkrbbrkegbrejb\r\nreopjgporejytopjrotjrphjpojprhjtporhtjrph" "codeA\r\n->refbrjkgbrkjgbrjukbgreukgbrukgbegurebgrek\r\nklgfhnrjkgnrjgbrejkgbrjkbegjkrbbrkegbrejb\r\nreopjgporejytopjrotjrphjpojprhjtporhtjrph" In the post there are spaces shown (such as after 'nklgfh' and before 'nrjk') that are not present in the actual material. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

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Feb 12th, 2006, 8:20 AM	#3
ktsirig Programmer Join Date: Oct 2005 Posts: 54 Rep Power: 3	DaWei, thanx for the post... I tried using double quotes, but doesn't do anything... and the weird thing is that, for instance, spaces are matced with \s but why newlines don't???? I can't figure it out.....

Feb 12th, 2006, 8:38 AM	#4
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	Maybe you have to use \r\n, instead of only \n. Absolutely not sure, though.

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Programming Forums > Web Development and Design > PHP

PHP & newlines Regular expressions