Hi All,
I have files:
1. abc.sql
'This is a sample file for testing'
This does not have quotations
this also does not have quotations.
and this 'has quotations'.
here I need to list the hard coded strings 'This is a sample file for testing' and
'has quotations'.
So i have... (13 Replies)
Hi, how do I match a particular element in a list and replace it with blank?
awk 'sub///' $FILE
list="AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA,
HI, ID, IL, IN, IA, KS, KY, LA, ME, MD,
MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ,
NM, NY, NC, ND, OH, OK, OR, PA, RI, SC,
SD, TN, TX, UT, VT, VA, WA,... (2 Replies)
If i wanted to search for two strings that are on lines in the log, how do I do it?
The following code searches for just one string that is one one line.
awk '/^/ {split($2,s,",");a=$1 FS s} /failure agaf@fafa/ {b=a} END{print b}' urfile
What if I wanted to search for "failure agaf@fafa"... (3 Replies)
Hi, i would really appreciate any help anyone can give with the following info.
Thanks in advance.
I need to run a search on a file that contains thousands of trades, each trade is added into the file in blocks of 25 lines. i know the search has to take place between a time stamp specified... (4 Replies)
I am wanting to take a list of strings and loop through a list of textfiles to find matches. Preferably with awk and parsing the search strings into an array.
// Search_strings.txt
tag
string
dummy
stuff
things
// List of files to search in
textfile1.txt
textfile2.txt
The... (6 Replies)
Hi,
I have a text file with the following content:
monday,20
tuesday,10
wednesday,29
monday,10
friday,12
wednesday,14
monday,15
thursday,34
i want the following output:
monday,45
tuesday,10
wednesday,43
friday,12 (3 Replies)
Objective:
Recursively search all files under a directory for SQL statements that end with ";"
Sample input:
UPDATE table1
set col=val
UPDATE table2
set cola=vala
,colb=valb;
UPDATE table3
set col=val
Expected output:
UPDATE table2
set cola=vala
,colb=valb; (1 Reply)
Hello Guyz
I have been following this forum for a while and the solutions provided are super useful. I currently have a scenario where i need to search for a pattern and start searching by keeping the first pattern as a baseline
ABC
DEF
LMN
EFG
HIJ
LMN
OPQ
In the above text i need to... (8 Replies)
I have a file with many lines which contain strings like .. etc.
But with no rule regarding field separators or anything else.
I want to print ONLY THE STRING from each line , not the entire line !!!
For example from the lines :
Flow on service executed with success in . Performances... (5 Replies)
I have this fileA
TEST FILE ABC
this file contains ABC;
TEST FILE DGHT this file contains DGHT;
TEST FILE 123
this file contains ABC,
this file contains DEF,
this file contains XYZ,
this file contains KLM
;
I want to have a fileZ that has only (begin search pattern for will be... (2 Replies)
Discussion started by: vbabz
2 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)