I am looking for a regex syntax to match repeated appearance. Likes,
Now, this gets messy if I need to extract all such repeated appearance. I don't want to write [[:alnum:]] four or five times for matching repeated appearance.
Thanks in advance.
---------- Post updated at 07:56 PM ---------- Previous update was at 07:43 PM ----------
Basically, I am looking at extracting all alpha numeric from the string. Doesn't matter how many times it appears in the string.
Hi
I have a file with data arranged into columns. The first column is the chromosome name.
When I use grep to subset only rows with chr1, I get chr1 but also chr10, chr11,..
How do I get only rows with chr1?
grep chr1 filein > fileout
head fileout
chr1 59757841
chr11 108258691 ... (2 Replies)
Hi,
I'm struggling with a regex that would match a 'b' that follows an 'a' and is at the end of a string of non-white characters. For example:
Line 1: aba abab b abb aab bab baa
I can find the right strings but I'm lacking knowledge of how to "discard" the bits that precede bs.... (2 Replies)
Hi all,
any idea how to match the following:
char*<no or any string or space> buf and
char *<no or any string or space> buf
i need to capture the buf characters too.
currently i need two checks to cover this:
#search char* <any string> buf or char *<any string> buf
@noarray =... (2 Replies)
Hello All
I have file which contain sample data like below -
test.txt
----------------------------------------------
jambesh aaa india
trxxx
sdasd
mentor
asss
light
train
bbblah
---------------------------------------------
I want to write a regX which would print only those... (4 Replies)
I am trying to match a similar line using grep with regular expression
the line is
/remote/mac/pbbbb/abc/def/hij/hop/include/abc/tif/element/test/testfiles/Office.cpp:57: const OfficeType& getType().get() const;
I just need to extract the bold characters using grep with regular expression.... (5 Replies)
hi everyone
suppose we have two scenario
echo ABCD | grep \{4\}
DATE
echo SYSDATE | grep \{4\}
SYSDATE
i want to match the string of four length only please help (5 Replies)
Hi Everybody!
I need some help with a regular expression in Perl that will match files named messages, but also files named message.1, message.2 and so on. So really I need one that will find messages and messages that might be followed by a period and a digit without matching other files like... (2 Replies)
I cannot seem to get this to work correct:
my ($k, $v) = split(/F/, $fc{$DIR}{symbolic}, 2);
Below is the input (the $fc{$DIR}{symbolic} variable):
QMH2562 FW:v5.06.03 DVR:v8.03.07.15.05.09-kbut i also need it to break on FV:
Emulex NC553i FV4.2.401.6 DV8.3.5.86.2pthe code above... (2 Replies)
Using a regular expression, I would like multiple lines to be matched.
By default, a period (.) matches any character except newline. However, (?s) and /s modifiers are supposed to force . to accept a newline and to match any character including a newline.
However, the following two perl... (4 Replies)
echo 20110101 | awk '{ print match($0,/^((17||18||19||20)|)-*(|0|1)-*(|0||3)$/))
I am getting a match for the above, where as it shouldn't, as there is no hyphen in the echoed date.
Another question is what is the difference between || and | in the above statement (4 Replies)
Discussion started by: tostay2003
4 Replies
LEARN ABOUT PHP
spliti
SPLITI(3) 1 SPLITI(3)spliti - Split string into array by regular expression case insensitiveSYNOPSIS
array spliti (string $pattern, string $string, [int $limit = -1])
DESCRIPTION
Splits a $string into array by regular expression.
This function is identical to split(3) except that this ignores case distinction when matching alphabetic characters.
Warning
This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.
PARAMETERS
o $pattern
- Case insensitive regular expression. If you want to split on any of the characters which are considered special by regular
expressions, you'll need to escape them first. If you think spliti(3) (or any other regex function, for that matter) is doing
something weird, please read the file regex.7, included in the regex/ subdirectory of the PHP distribution. It's in manpage for-
mat, so you'll want to do something along the lines of man /usr/local/src/regex/regex.7 in order to read it.
o $string
- The input string.
o $limit
- If $limit is set, the returned array will contain a maximum of $limit elements with the last element containing the whole rest
of $string.
RETURN VALUES
Returns an array of strings, each of which is a substring of $string formed by splitting it on boundaries formed by the case insensitive
regular expression $pattern.
If there are n occurrences of $pattern, the returned array will contain n+1 items. For example, if there is no occurrence of $pattern, an
array with only one element will be returned. Of course, this is also true if $string is empty. If an error occurs, spliti(3) returns
FALSE.
EXAMPLES
This example splits a string using 'a' as the separator :
Example #1
spliti(3) example
<?php
$string = "aBBBaCCCADDDaEEEaGGGA";
$chunks = spliti ("a", $string, 5);
print_r($chunks);
?>
The above example will output:
Array
(
[0] =>
[1] => BBB
[2] => CCC
[3] => DDD
[4] => EEEaGGGA
)
NOTES
Note
As of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension. Calling this function will issue an E_DEPRECATED
notice. See the list of differences for help on converting to PCRE.
Tip
spliti(3) is deprecated as of PHP 5.3.0. preg_split(3) with the i ( PCRE_CASELESS) modifier is the suggested alternative.
SEE ALSO preg_split(3), split(3), explode(3), implode(3).
PHP Documentation Group SPLITI(3)