.
.
.
However, could you tell me what the following line means. I have never sen this expression before:
Does it mean 'B = index of CHR starting after same DIG index'? .
.
.
!(DIG[1]) is a boolean expression that assumes the values 0 or 1 depending on that array element having a value or not. Actually above it is a - sometimes dicussed - shortcut for if (DIG[1] == 0) then B = 2 else B = 1
i have an awk statement which i am using to count the number of occurences of the number ,5, in the file:
awk '/,5,/ {count++}' TRY.txt | awk 'END { printf(" Total parts: %d",count)}'
i know there is a total of 10 matches..what is wrong here?
thanks (16 Replies)
Trying to sum field #6 when field #2 matches string as follows:
Input data:
2010-09-18-20.24.44.206117 UOWEXEC db2bp DB2XYZ hostname 1
2010-09-18-20.24.44.206117 UOWWAIT db2bp DB2XYZ hostname ... (3 Replies)
I want to search a bunch of files and list only those containing a minimum number of pattern matches. So if I want to identify files containing 3 (or more) instances of the pattern "said:" and I have file1 that contains the lines:
He said:
She said:
and file2 that contains the lines:
He... (3 Replies)
Hi,
I need some help on how to print the whole data for unmatched pattern. i have 2 different files that need to be checked and print out the unmatched patterns into a new file. My sample data as follows:-
File1.txt
Id Num Activity Class Type
309 1.1 ... (5 Replies)
To match range, the command is:
awk '/BEGIN/,/END/'
but what I want is the range is printed only if there is additional pattern that matches in the range itself? maybe like this:
awk '/BEGIN/,/END/ if only in that range there is /pattern/'
Thanks (8 Replies)
I have a directory of files, each with a variable (though small) number of lines. I would like to go through each line in each file, and print the:
-file name
-line number
-number of matches to the pattern /comp/ for each line.
Two example files:
cat... (4 Replies)
Hello,
I have been trying to write a script where I could get awk to delete data before and after a matched pattern.
For eg
Raw data
Start
NAME = John
Age = 35
Occupation = Programmer
City = New York
Certification Completed = No
Salary = 80000
End
Start
NAME = Mary
Age = 25... (2 Replies)
Hi
I need to egrep patterns in a file and limit number of matches to print for each matched pattern.
-m10 option is not working out in my sun solaris 5.10
Please guide me the options to achieve.
if i do head -10 , i wont be getting all pattern match results as output since for a... (10 Replies)
Input data as below (filetest.txt):
1|22 JAN Minimum Bal 20.00 | SAT
2|09 FEB Extract bal 168.00BR | REM
3|MIN BAL | LEX
Output should be:
( If there is Date & Month in 2nd field of Input file, It should be seperated else blank. If There is Decimal OR Decimal & Currency in last of the 2nd... (7 Replies)
I have a text file with many thousands of lines, a small sample of which looks like this:
InputFile:PS002,003 D -1 5 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 6 6 -1 -1 -1 -1 0 509 0
PS002,003 PSQ 0 1 7 18 1 0 -1 1 1 3 -1 -1 ... (5 Replies)
Discussion started by: jvoot
5 Replies
LEARN ABOUT PHP
preg_replace_callback
PREG_REPLACE_CALLBACK(3) 1 PREG_REPLACE_CALLBACK(3)preg_replace_callback - Perform a regular expression search and replace using a callbackSYNOPSIS
mixed preg_replace_callback (mixed $pattern, callable $callback, mixed $subject, [int $limit = -1], [int &$count])
DESCRIPTION
The behavior of this function is almost identical to preg_replace(3), except for the fact that instead of $replacement parameter, one
should specify a $callback.
PARAMETERS
o $pattern
- The pattern to search for. It can be either a string or an array with strings.
o $callback
- A callback that will be called and passed an array of matched elements in the $subject string. The callback should return the
replacement string. This is the callback signature:
string handler (array $matches) You'll often need the $callback function for a preg_replace_callback(3) in just one place. In
this case you can use an anonymous function to declare the callback within the call to preg_replace_callback(3). By doing it this
way you have all information for the call in one place and do not clutter the function namespace with a callback function's name
not used anywhere else.
Example #1
preg_replace_callback(3) and anonymous function
<?php
/* a unix-style command line filter to convert uppercase
* letters at the beginning of paragraphs to lowercase */
$fp = fopen("php://stdin", "r") or die("can't read stdin");
while (!feof($fp)) {
$line = fgets($fp);
$line = preg_replace_callback(
'|<p>s*w|',
function ($matches) {
return strtolower($matches[0]);
},
$line
);
echo $line;
}
fclose($fp);
?>
o $subject
- The string or an array with strings to search and replace.
o $limit
- The maximum possible replacements for each pattern in each $subject string. Defaults to -1 (no limit).
o $count
- If specified, this variable will be filled with the number of replacements done.
RETURN VALUES preg_replace_callback(3) returns an array if the $subject parameter is an array, or a string otherwise. On errors the return value is NULL
If matches are found, the new subject will be returned, otherwise $subject will be returned unchanged.
CHANGELOG
+--------+---------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------+
| 5.1.0 | |
| | |
| | The $count parameter was added |
| | |
+--------+---------------------------------+
EXAMPLES
Example #2
preg_replace_callback(3) example
<?php
// this text was used in 2002
// we want to get this up to date for 2003
$text = "April fools day is 04/01/2002
";
$text.= "Last christmas was 12/24/2001
";
// the callback function
function next_year($matches)
{
// as usual: $matches[0] is the complete match
// $matches[1] the match for the first subpattern
// enclosed in '(...)' and so on
return $matches[1].($matches[2]+1);
}
echo preg_replace_callback(
"|(d{2}/d{2}/)(d{4})|",
"next_year",
$text);
?>
The above example will output:
April fools day is 04/01/2003
Last christmas was 12/24/2002
Example #3
preg_replace_callback(3) using recursive structure to handle encapsulated BB code
<?php
$input = "plain [indent] deep [indent] deeper [/indent] deep [/indent] plain";
function parseTagsRecursive($input)
{
$regex = '#[indent]((?:[^[]|[(?!/?indent])|(?R))+)[/indent]#';
if (is_array($input)) {
$input = '<div style="margin-left: 10px">'.$input[1].'</div>';
}
return preg_replace_callback($regex, 'parseTagsRecursive', $input);
}
$output = parseTagsRecursive($input);
echo $output;
?>
SEE ALSO
PCRE Patterns, preg_quote(3), preg_replace(3), preg_last_error(3), Anonymous functions, information about the callback type.
PHP Documentation Group PREG_REPLACE_CALLBACK(3)