Hello,
I am newcomer and sorry for this simple question. I want to how to compare two lines in a file? For example, to compare the first line and the second line of a file to know if they are same?
Thanks in advance!
Leon (3 Replies)
hi
how can i read a file using the unix script and check for one or more field value for a predefined status/value
for example : the file contains the following text
Name IP Address/Mask Type Connection Status
mgmt-eth0(1) ... (2 Replies)
Hi, I want to compare the last two lines of a files, specifically characters 32 - 50 in both lines and generate an exit code if the range of characters do not match. Please advise. Thanks in advance! (2 Replies)
i want a shell script to read the a list of numbers from a file and compare with a unique number with the list.
FOR EXAMPLE :
abc.lst file contains d following
2343
3214
45654
563456
5436
Unique number is 2342 (6 Replies)
Hi ,
I have a CSV file ( file.csv) with some data as
below:
A,1,abc,x,y,z,,xyz,20100101,99991231
A,1,abc,x,y,z,234,xyz,20100101,99991231
I have to delete the duplicate line based on
unique identifiers which are values in the
fields- 2,3,4,8.These coulmns in both the rows
have same... (6 Replies)
could someone write a short script which is able to take a text file input and compare lines 1 and 2, 3 and 4, 5 and 6 ... ... until the end of the file. And to prompt if the lines are not equal.
Thank you! (10 Replies)
Hello All,
i am a newbie and need some help when reading a csv file in a bourne shell script. I want to read 10 lines, then wait for a minute and then do a reading of another 10 lines and so on in the same way. I want to do this till the end of file.
Any inputs are appreciated
... (3 Replies)
I have a file which has following content:
NAME=ora.DG1.dg
TYPE=ora.diskgroup.type
TARGET=ONLINE
STATE=ONLINE
NAME=ora.DG2.dg
TYPE=ora.diskgroup.type
TARGET=ONLINE
STATE=ONLINE
NAME=ora.DG3.dg
TYPE=ora.diskgroup.type
TARGET=ONLINE
STATE=ONLINE
NAME=ora.DG4.dg... (7 Replies)
Hello Guys
I need to read and compare two file, one file contains hostname, and others contain hostname and IP@,
and the objective is to read each file and compare if line in file1 equal to first word in the second file2
file1
file2
this is my first code
fqdn_hosts=list.txt... (2 Replies)
Discussion started by: Abdellah
2 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)