Have another question that has been eluding me all day.
I have data file I'm trying to reformat so that each line is appended with an ID code, but the ID code needs to update as it searches through the file.
I.e.
----Begin Original Datafile-----
Condition = XXX
Header Line 1
Header... (1 Reply)
Col1 Col2 Col3 Col4
12 Completed 08 0830
12 In Progress 09 0829
11 For F U 07 0828
Considering the file above, how could i replace the third column the most efficient way? The actual file size is almost 1G. I am... (10 Replies)
I know this has been asked before but I just can't parse the syntax as explained. I have a set of files that has user information spread out over two lines that I wish to merge into one:
User1NameLast User1NameFirst User1Address
E-Mail:User1email
User2NameLast User2NameFirst User2Address... (11 Replies)
I was wondering someone might be able to push me in the right direction, I am writing a script to modify fixed-width spool files, As you can see below the original spool file broke a single line into two for printability sake.
I have had been able do the joins using sed, the thing I am... (10 Replies)
I have to create a single file from three files, Please see below for samples:
day.txt
20090101
20090102
item.txt
123456789101
12345678910209
1234567891
str.txt
1
12
123
output.txt
20090101123456789101 1 0
2009010112345678910209 12 ... (2 Replies)
I have a file with different record length. The file as to be converted into fixed length by appending spaces at the end of record. The length should be calculated based on the record with maximum length in the file.
If the length is less than the max length, the spaces should be appended... (4 Replies)
hi,
i have a fixed width file with multiple columns and need to print data using awk command.
i use: awk -F "|" '($5 == BH) {print $1,$2,$3}' <non_AIM target>.txt for a delimiter file.
but now i have a fixed width file like below:
7518 8269511BH 20141224951050N8262
11148 8269511BH... (5 Replies)
All,
I used to use following command to replace specific location in a fixed width file.
Recently looks like my command stopped working as intended. We are on AIX unix.
awk 'function repl(s,f,t,v)
{ return substr(s,1,f-1) sprintf("%-*s", t-f+1, v) substr(s,t+1) }
NR<=10 {... (3 Replies)
Hi Forum.
I have the following script that splits a large fixed-width file into smaller multiple fixed-width files based on input segment type.
The main command in the script is:
awk -v search_col_pos=$search_col_pos -v search_str_len=$search_str_len -v segment_type="$segment_type"... (8 Replies)
Discussion started by: pchang
8 Replies
LEARN ABOUT PHP
substr
SUBSTR(3) 1 SUBSTR(3)substr - Return part of a stringSYNOPSIS
string substr (string $string, int $start, [int $length])
DESCRIPTION
Returns the portion of $string specified by the $start and $length parameters.
PARAMETERS
o $string
- The input string. Must be one character or longer.
o $start
- If $start is non-negative, the returned string will start at the $start'th position in $string, counting from zero. For
instance, in the string ' abcdef', the character at position 0 is ' a', the character at position 2 is ' c', and so forth. If
$start is negative, the returned string will start at the $start'th character from the end of $string. If $string is less than or
equal to $start characters long, FALSE will be returned.
Example #1
Using a negative $start
<?php
$rest = substr("abcdef", -1); // returns "f"
$rest = substr("abcdef", -2); // returns "ef"
$rest = substr("abcdef", -3, 1); // returns "d"
?>
o $length
- If $length is given and is positive, the string returned will contain at most $length characters beginning from $start (depend-
ing on the length of $string). If $length is given and is negative, then that many characters will be omitted from the end of
$string (after the start position has been calculated when a $start is negative). If $start denotes the position of this trunca-
tion or beyond, false will be returned. If $length is given and is 0, FALSE or NULL, an empty string will be returned. If
$length is omitted, the substring starting from $start until the end of the string will be returned.
Example #2
Using a negative $length
<?php
$rest = substr("abcdef", 0, -1); // returns "abcde"
$rest = substr("abcdef", 2, -1); // returns "cde"
$rest = substr("abcdef", 4, -4); // returns false
$rest = substr("abcdef", -3, -1); // returns "de"
?>
RETURN VALUES
Returns the extracted part of $string; or FALSE on failure, or an empty string.
CHANGELOG
+--------------+---------------------------------------------------+
| Version | |
| | |
| | Description |
| | |
+--------------+---------------------------------------------------+
|5.2.2 - 5.2.6 | |
| | |
| | If the $start parameter indicates the position |
| | of a negative truncation or beyond, false is |
| | returned. Other versions get the string from |
| | start. |
| | |
+--------------+---------------------------------------------------+
EXAMPLES
Example #3
Basic substr(3) usage
<?php
echo substr('abcdef', 1); // bcdef
echo substr('abcdef', 1, 3); // bcd
echo substr('abcdef', 0, 4); // abcd
echo substr('abcdef', 0, 8); // abcdef
echo substr('abcdef', -1, 1); // f
// Accessing single characters in a string
// can also be achieved using "square brackets"
$string = 'abcdef';
echo $string[0]; // a
echo $string[3]; // d
echo $string[strlen($string)-1]; // f
?>
Example #4
substr(3) casting behaviour
<?php
class apple {
public function __toString() {
return "green";
}
}
echo "1) ".var_export(substr("pear", 0, 2), true).PHP_EOL;
echo "2) ".var_export(substr(54321, 0, 2), true).PHP_EOL;
echo "3) ".var_export(substr(new apple(), 0, 2), true).PHP_EOL;
echo "4) ".var_export(substr(true, 0, 1), true).PHP_EOL;
echo "5) ".var_export(substr(false, 0, 1), true).PHP_EOL;
echo "6) ".var_export(substr("", 0, 1), true).PHP_EOL;
echo "7) ".var_export(substr(1.2e3, 0, 4), true).PHP_EOL;
?>
The above example will output:
1) 'pe'
2) '54'
3) 'gr'
4) '1'
5) false
6) false
7) '1200'
ERRORS /EXCEPTIONS
Returns FALSE on error.
Example #5
<?php
var_dump(substr('a', 1)); // bool(false)
?>
SEE ALSO strrchr(3), substr_replace(3), preg_match(3), trim(3), mb_substr(3), wordwrap(3), String access and modification by character.
PHP Documentation Group SUBSTR(3)