I have a text file containing
/database/sp/NTR_Vlr_Upload.sql
/database/tables/StatsTables.sql
/mib/ntr.mib
/mib/ntr.v2.mib
/scripts/operations/ntr/IMSITracer.ph
i want the last field after "/" removed like
/database/sp/
/database/tables/
/mib/
/mib/ ... (4 Replies)
All,
I have a field in a comma seperated file with hundreds of lines and about 20 columns and I wish to remove all numbers after the decimal point in field 4 on each line and output the rest to another file or write it back to itself.
File is like this
20070126, 123.0, GBP, 1234.5678,... (9 Replies)
Hello,
I'm new to Perl programming and I have a duplicate 035 tag Voyager application field. The first 035 tag has the information I need but the second 035 tag created the bib id, which I don't need. This incident was performed on several records so I would have to run this script on several... (1 Reply)
Hello, I am using awk to match text in a tab separated field and am able to do so when matching the exact word. My problem is that I would like to match any sequence of text in the tab-separated field without having to match it all. Any help will be appreciated. Please see the code below.
awk... (3 Replies)
Consider my input string as "abc|b f g|bj gy"
I am expecting the output as "abc|bfg|bj gy".
Please let me know how to achieve this in unix?
Thanks (8 Replies)
Hi All,
i have a file having multiple lines but mainly constitues of following two types
1) Sat,Oct,1,01:04:51,2011,Local,ESSBASE0,Info(1051037),Logging,out,user,210073155,,,active,for,63,minutes,GETS_SAL,loaded
2)... (2 Replies)
I have a .CSV file (file.csv) whose data are all enclosed in double quotes. Sample format of the file is as below:
column1,column2,column3,column4,column5,column6, column7, Column8, Column9, Column10
"12","B000QRIGJ4","4432","string with quotes, and with a comma, and colon: in... (3 Replies)
Hello,
I am trying to eliminate rows where the first field is duplicated, leaving the row where the last field is "NET".
Data file:
345234|22.34|LST
546543|55.33|LST
793929|98.23|LST
793929|64.69|NET
149593|49.22|LST
Desired output:
345234|22.34|LST
546543|55.33|LST... (2 Replies)
Hi all,
I have a csv input file with total 60 fields and the fields are not enclosed with double quotes.One of the field(50th field) in this file has line breaks in it which results in the row getting split into multiple lines.This is causing my load(to table) to fail.I tried to enforce double... (3 Replies)
I will start with an example of what I'm trying to do and then describe how I am approaching the issue.
File
PS028,005
Lexeme HRS # M #
PhraseType 1(1:1) 7(7)
PhraseLab 501 503
ClauseType ZYq0
PS028,005
Lexeme W # L> # BNH # M #... (17 Replies)
Discussion started by: jvoot
17 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)