Hi all,
Is there any way I can check a file for the linefeed character at the end of the file, and append one only if it is missing (ie. Incomplete last line)?
Need to do this because I need to write a script to process files FTP-ed over from various machines, which may or may not be... (1 Reply)
Hi folks,
I am using the join command to join two files on a common field as follows:
File1.txt
Adsorption|H01.181.529.047
Adult|M01.060.116
Children|M01.055
File2.txt
5|Adsorption|C0001674
7|Adult|C000001
6|Children|C00002
join -i -t "|" -a 2 -1 1 -2 2 File1.txt File2.txt
This... (7 Replies)
I've got a strange problem with a single mail sender (it is one of
those large free mail providers). My mail server works well with
thousands of senders but not this one, so we have made a connection
dump and it seems that the three way handshake is not completed
15:55:59.177431 IP... (0 Replies)
On Solaris & AIX, suppose there is a directory 'dir'.
Log files of size approx 1MB are continuously being
deposited here by scp command. I have a script that scans
this dir every 5 mins and moves away the log files that
have been deposited so far.
How do I design my script so that I pick up... (6 Replies)
On Solaris, suppose there is a directory 'dir'.
Log files of size approx 1MB are continuously being
deposited here by scp command. I have a script that scans
this dir every 5 mins and moves away the log files that
have been deposited so far.
How do I design my script so that I pick up *only*... (6 Replies)
#!/bin/bash
DIR=/dir/$(date +%y%m)
|| mkdir "$DIR"
for D in $@ # obtem os argumentos
do
cp /usr/home/backup
if backup=null then
mkdir backup
done
How can I complete that script, that's not value, can someone help me complete this...
The point of the program is:
- If the... (1 Reply)
I need help with appending the last line to the file only if the last line is incomplete.
I tried awk 1 filename > new_filename but it appends to every file and I only want to append to the file if the last line is incomplete (3 Replies)
Hello,
Since i am new in shell scripting, i need some help from you guys. :rolleyes:
I am trying to implement an automata that reflects the attached photo..
The main idea behind is to take an array of (0 & 1)s from the user and terminate it by "end". Then, the string is send to the function... (1 Reply)
Hi all,
Please help with the following example.
I want to keep all people in the data, who at least have Firstname or Lastname or both and at least 1 row of Details. So, Person4 lacking both Firstname and Lastname will be deleted, Person5 with no Details will be deleted.
Firstname,Lastname... (3 Replies)
Discussion started by: ritakadm
3 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)