Hi ,
i export the crontab in a file (i've no root right) and i would add lines from a file at a special place and rewrite the output in an another file.
the special place is as this :
45 04 * * * /home/toto.sh > /dev/null 2>&1
#
so i would search for toto.sh and insert the lines , the... (5 Replies)
Hi all,
I want to insert a string in a specified place of a very large file. I am giving an example of the task:
I love football.
Above is a sentence in a file and I want to insert a string "the" between love and football. It is not sure that where this particular line exists. It has to... (4 Replies)
Hi,
I have a source file as mentioned below: I want to remove all the extra spaces between the fields.
a b--------|sa df-------|3232---|3
sf sa------|afs sdf-----|43-----|33
a b c------|adfsa dsf---|23-32|23
*Here '-' idicates spaces
Now, I want output as below:
a b|sa df|3232|3... (7 Replies)
Hi,
I have a log file generated by a tool which has the following look :
/tmp/releases/directory/datefilename1_release_date.zip
/tmp/releases/directory/datefilename2_release_date.zip
/tmp/releases/directory/datefilename3_release_date.zip... (8 Replies)
Hi all,
I have a file in which I have to insert commna between entries of 2 column and createa new file separated by commas not a columns
if input is
FHIT Adenosine Monotungstate Not Available
CS Trifluoroacetonyl Coenzyme A Not Available
Theo expected output is
... (5 Replies)
Hi
I tried to put underscore in place of column in a big file with lots of oclumns using the programm
sed 's//_/g'
Its showing error
bash-3.2$ sed 's//_/g'saradrugbankgenedrugnewlist.txt >saradrugbankgenedrugnewlist3.txt
sed: -e expression #1, char 11: unknown option to `s'
if... (24 Replies)
Hi Folks,
I have a huge data of the below format
abc #apple 1200 06/23
ghj #orange 1500 06/27
uyt #banana 2300 05/13
efg #vegetable 0700 04/16
After first 3 letters, i have 9 spaces and after fruit there are no specific fixed space, but it varies... (4 Replies)
Hi All,
I want to keep the name of the songs with their respective extensions only.
Sample Code
========
03 Choti choti gaiya choti choti gaval.mp3
03---Brazil Dhol.mp3
03 PAYALIYA .mp3
04 - Isq Risk .mp3
04%20-%20Oh%20My%20Love(wapking.in).mp3
08 - A2 - Aasan Nahin Yahan .mp3
AE... (3 Replies)
hello
i have file with 100k records and each one has certain value that starts at 28th column and certain value that starts at 88th column
e.g. 1st file
<25>1234567 ..... <88> 8573785485
i have aditional file with values which are related to value that starts at 88th column of the... (1 Reply)
Hello,
I have an xml file and my aim is to grab each line in keywords file and search the string in another file.
When keyword is found in xml file,I expect the script to go to previous line in the xml file and grab the string/value between two strings. It's almost working with an error.
tab... (6 Replies)
Discussion started by: baris35
6 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)