I suppose the problem being the "echo" statement. It is fed the content of the variable "$line" and interprets it. "\n" and "\t" in your example are control characters, though. "\n" is "newline", "\t" is tab.
Anyhow, your implementation isn't all too good anyway, because you use several commands and a pipeline to do what shell exansion could do too - at considerably less computing costs:
Change your code accordingly and it should not only work but run faster too.
An independent observation: DO NOT use backticks any more. They are deprecated and the shell only understands them for backward compatibility issues. Use the modern "$(...)" instead, which is a lot more flexible, can be nested, can be quoted, ...
Another hint: in case you write for Korn shell you might consider using file descriptors instead of redirection. Instead of:
Hi All,
I am looking for a solution to capture any ASCII control character in a file
( where the ASCII control character is in decimal value from 0 to 31 and 127
( Hex value from 00 to 1F and 7F ) ) by returning any affected lines.
The intended good file should contain "ASCII printable... (5 Replies)
Hi All,
I am very new to Shell scripting...
I got a requirement.
I will have few text files(data files) in a particular directory. they will be with .txt extension. With same name, but with a different extension control files also will be there. For example, Sample_20081001.txt is the data... (4 Replies)
can any one say about command to find "^M" (Control M)characters in a unix text file.
^M comes when a file ftped from windows to unix without using bin mode.
I need the command to find lik this,
ex.txt:
------------------------------
...,name,time^M
go^M
...file,end^M... (5 Replies)
Hi,
I have one file, say file 1, that has data like below where 19900107 is the date,
19900107 12 144 129 0.7380047
19900108 12 168 129 0.3149017
19900109 12 192 129 3.2766666E-02
... (3 Replies)
I am getting error when loading data file using ctl file. I get this error only when there is special character.
Below is some data.
DataFile=>
company_id|ciu_id|english_name|iso_country_code|active|partner_name
1-2JT-122||Expert Järvenpää|FI|A|Expert Järvenpää
Control File=>
LOAD DATA... (1 Reply)
In a 10-50GB file , at end of file there is Control-z character
tried the below options,
1. perl -p -i -e 's/^Z//g' new.txt
2. perl -0777lwi -032e0 new.txt
and Sed command, dos2unix etc
it takes more time to remove the control-z. need a command or perl program to GO TO LAST LINE OF FILE ... (7 Replies)
in a file we are getting control character in a file , is there any way that they can be removed once we have the file
for eg.
BEGIN-PROCEDURE INITIALIZE
^M
LET #row_count = 0^M
^M
^M (2 Replies)
Hi All,
i have a requirement where i need to format the input RAW file ( which is CSV) by using another mapping file(also CSV file). basically i am getting feed file with dynamic headers by using mapping file (in that target field is mapped with source filed) i have to convert the raw file into... (6 Replies)
Hello,
I have a file with the below contents :
Policy Name: Backup_bkp
Policy Type: Catalog_bkp
Active: yes
Effective date: 08/07/2013 02:02:12
Mult. Data Streams: no
Client Encrypt: no
Checkpoint: no
Policy Priority: ... (11 Replies)
Discussion started by: rahul2662
11 Replies
LEARN ABOUT PHP
eval
EVAL(3) 1 EVAL(3)eval - Evaluate a string as PHP codeSYNOPSIS
mixed eval (string $code)
DESCRIPTION
Evaluates the given $code as PHP.
Caution
The eval(3) language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
PARAMETERS
o $code
- Valid PHP code to be evaluated. The code mustn't be wrapped in opening and closing PHP tags, i.e. 'echo "Hi!";' must be passed
instead of '<? echo "Hi!"; >'. It is still possible to leave and reenter PHP mode though using the appropriate PHP tags, e.g.
'echo "In PHP mode!"; ?>In HTML mode!<? echo "Back in PHP mode!";'. Apart from that the passed code must be valid PHP. This
includes that all statements must be properly terminated using a semicolon. 'echo "Hi!"' for example will cause a parse error,
whereas 'echo "Hi!";' will work. A return statement will immediately terminate the evaluation of the code. The code will be exe-
cuted in the scope of the code calling eval(3). Thus any variables defined or changed in the eval(3) call will remain visible
after it terminates.
RETURN VALUES eval(3) returns NULL unless return is called in the evaluated code, in which case the value passed to return is returned. If there is a
parse error in the evaluated code, eval(3) returns FALSE and execution of the following code continues normally. It is not possible to
catch a parse error in eval(3) using set_error_handler(3).
EXAMPLES
Example #1
eval(3) example - simple text merge
<?php
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "
";
eval("$str = "$str";");
echo $str. "
";
?>
The above example will output:
This is a $string with my $name in it.
This is a cup with my coffee in it.
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Tip
As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of
this function, and save it in a string (for example).
Note
In case of a fatal error in the evaluated code, the whole script exits.
SEE ALSO call_user_func(3).
PHP Documentation Group EVAL(3)