one way is to use tr to remove unwanted character types. -dc removes everything except those char types you specify. [:alnum;] is alphanumeric, so if you check the length of the string it should be unchanged if it contains only the char types you want.
how to match an alphanumeric string like the following.
i have to do like the following.
if the input line is
the data is {clock_91b}
i have to replace that with
the string was ("clock_91b")
i tried like
$line =~ s/the data is\s+\{(+)\}/the string was \(\"$1\"\)/
which... (4 Replies)
Hi :)
I am writing a ksh
I have a string of general format
A12B3456CD78
the string is of variable length
the string always ends with numbers (here it is 78.. it can be any number of digits may be 789 or just 7)
before these ending numbers are alphabets (here it is CD can even be... (3 Replies)
I'm trying to do a simple if statement that tests if a filename exists with a user specified string.
So say I have these files:
Assigned_1day_after_due_chuong
Assigned_1day_after_due_gallen
Assigned_1day_after_due_heidenre
and i'm running a script and want to know if a... (6 Replies)
This is the code:
while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done
I read a command on every loop an execute it.
I check if the string equals the word stop to end the loop,but it say that I gave too many arguments to test.
For example echo hello.
Now the... (1 Reply)
Hi there,
I want to compare 2nd column which are alphanumeric values from each of the 2 files i.e.,lspv_pre.out and lspv_post.out , if found echo some message.
lspv_pre.out
hdisk0 00c39eaa451144dd rootvg active
hdisk1 00c39eaa45223322 ... (3 Replies)
Hi,
I would like to be able to parse out a substring matching a basic pattern, which is a character followed by 3 or 4 digits (for example S1234 out of a larger string). The main string would just be a filename, like Thisis__the FileName_S1234_ToParse.txt. The filename isn't fixed, but the... (2 Replies)
Hi everyone,
I want help to insert space between digits and letters in a alphanumeric string.
INPUT
TRY234TER
PHY1TYR
EXPECTED OUTPUT
TRY 234 TER
PHY 1 TYR
The lines always begin with the letters and the alphabets will be a three letter combination before and after the number. The... (2 Replies)
Hi,
I will be having file names like below,
1420SP1.01804
1420SP1.01805D
1420SP1.01805
1420SP1.01806D
1420SP1.01806
1420SP1.01901D
1420SP1.01901
1420SP1.01902D
1420SP1.01902
1420SP1.01903D
1420SP1.01903
1420SP1.01904
1420SP1.01905
From this, I need to list file names which is... (3 Replies)
Hi,
I want a script of a code that will allow me to generate all possible combinations of alphanumberica characters of length 12 such that each string will contain numbers and either small or capital letters.
For example a string may look like this: 123AB45cd678. (11 Replies)
Discussion started by: faizlo
11 Replies
LEARN ABOUT PHP
substr_count
SUBSTR_COUNT(3) 1 SUBSTR_COUNT(3)substr_count - Count the number of substring occurrencesSYNOPSIS
int substr_count (string $haystack, string $needle, [int $offset], [int $length])
DESCRIPTION substr_count(3) returns the number of times the $needle substring occurs in the $haystack string. Please note that $needle is case sensi-
tive.
Note
This function doesn't count overlapped substrings. See the example below!
PARAMETERS
o $haystack
- The string to search in
o $needle
- The substring to search for
o $offset
- The offset where to start counting
o $length
- The maximum length after the specified offset to search for the substring. It outputs a warning if the offset plus the length is
greater than the $haystack length.
RETURN VALUES
This function returns an integer.
CHANGELOG
+--------+-----------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+-----------------------------------------------+
| 5.1.0 | |
| | |
| | Added the $offset and the $length parameters |
| | |
+--------+-----------------------------------------------+
EXAMPLES
Example #1
A substr_count(3) example
<?php
$text = 'This is a test';
echo strlen($text); // 14
echo substr_count($text, 'is'); // 2
// the string is reduced to 's is a test', so it prints 1
echo substr_count($text, 'is', 3);
// the text is reduced to 's i', so it prints 0
echo substr_count($text, 'is', 3, 3);
// generates a warning because 5+10 > 14
echo substr_count($text, 'is', 5, 10);
// prints only 1, because it doesn't count overlapped substrings
$text2 = 'gcdgcdgcd';
echo substr_count($text2, 'gcdgcd');
?>
SEE ALSO count_chars(3), strpos(3), substr(3), strstr(3).
PHP Documentation Group SUBSTR_COUNT(3)