Folks,
Is there a simple way to replace one digit by two digit using sed.
Example,
mydigit1918_2006_8_8_lag1.csv should be
mydigit1918_2006_08_08_lag01.csv.
I tried this way, but doesn't work.
echo mydigit1989_2006_8_8_lag1.csv|sed 's/]/0]/'
Thank you, (5 Replies)
Hi All,
How can i convert a number 24 to 0024
In the same way how can i convert 123 to 0123?
All this has to be done inside a script
Thanks in advance
JS (6 Replies)
Hi,
I have a file with 40 columns out of which 15 are amount fields. There are approximately 6 mn records in this file.
The file has data in following format:
123A,Ank,00.468,US,IL,780,53489
253A,Tng,-00.456,US,CA,452,46781
363A,nkk,-00.023,US,NJ,539,09625
I need to take all amount fields... (1 Reply)
how to list all files in current directory whose second character is a digit.
i guess i hav to use grep command + ls for this. but dont know how to use? (6 Replies)
I need to list all files where 1rst column=ABK and char position 123 to 125=ZBK:
For the first part I can I can do a awk '{$1="ABK";print}' file and for the second a cut -c123-125 file | grep ZBK but this would only work partially..
How can I do this with only one awk command ?
Thanks in... (10 Replies)
how can i list all files in my home directory that have a 4 digit id number, the line number where the id is located and the id itself not printing the entire line? (5 Replies)
This is the content of my directory
c_g_se1_gb.ph
c_g_se1_gb.ph_pl_s.t
c_g_se1_gb.ph_pl_tr.t
c_g_se3_gb.ph
c_g_se3_gb.ph_pl_s.t
c_g_se3_gb.ph_pl_tr.t
c_g_se2_gb.ph
c_g_se2_gb.ph_pl_s.t
c_g_se2_gb.ph_pl_tr.t
c_g_se4_gb-1.ph
c_g_se4_gb-1.ph_pl_s.t
c_g_se4_gb-1.ph_pl_tr.t... (9 Replies)
I all
I am tryng to find a way to sort a list of number in a file by the value of last two digit.
i have a list like this
313202320388
333202171199
373202164587
393202143736
323202132208
353201918107
343201887399
363201810249
333201805043
353201791691 (7 Replies)
Discussion started by: rattoeur
7 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)