11-18-2008
Can you post a sample of code that shows the issue?
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1. Shell Programming and Scripting
Hi,
Please help me to echo the following statement using single quotes
Why can't I write 's between single quotes
Thanks in advance,
Chella (3 Replies)
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2. Shell Programming and Scripting
As the title says, echo is striping my quotes and I need them.
echo "<?xml version="1.0" encoding="ISO-8859-1"?>"
returns:
<?xml version=1.0 encoding=ISO-8859-1?>
Obviously,
echo "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>"
returns the result I need:
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3. Shell Programming and Scripting
I need to echo a string that has double quotes in a Perl script.
#!/usr/bin/env perl
`echo Rule123 -comment \"blah blah\" >> $filename`
I'd like to get below appended to $filename:
Rule 123 -comment "blah blah"
But instead, the double quotes are lost:
Rule 123 -comment blah bah
... (1 Reply)
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4. Shell Programming and Scripting
Hi,
I am generating html code using cshell, but i am having one problem while printing double quotes,
I need to write following code in file. where $var contains list of web address
<a href="$var">$var</a>
So i am using
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5. Shell Programming and Scripting
I'm a beginner of c shell scripting.
How I can echo a whole line from a file with bracket in it?
Ex. Inside the file.txt
abcd efghi
This is what inside the c shell
set IN_FILE = file.txt
set GREP_KEY = 'abcd'
set IN_LINE = `grep ${GREP_KEY} ${IN_FILE}`
echo $IN_LINE
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6. Shell Programming and Scripting
Consider the following script:
#!/bin/bash
exclude='Archive PST,SystemState'
IFS=$","
rsyncExclusions=$(for exclude in ${exclude}; do echo -n -e --exclude=\"${exclude}\"\ ; done)
unset IFS
echo rsync $rsyncExclusions test
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7. Shell Programming and Scripting
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8. Shell Programming and Scripting
HI Guys,
I want to echo below line in my file :-
lpd | grep AL | nawk '{print "1dLA - " $0}
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9. Programming
Hi All,
I want to replace the commas which are not inside parenthesis,quotes
if input is
abc,,lm,(no,pq,rs),{tu,vw,xy},zs,"as,as,fr",'ab,cd,ef'
output should be
abc lm (no,pq,rs) {tu,vw,xy} zs "as,as,fr" 'ab,cd,ef'
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10. Shell Programming and Scripting
Please help me to use echo or printf type of command to print some value from variable within double quotes - I want to print the double quote ( " ") also.
I tried
#!/bin/bash
VALUE=some_value
echo '{"value" : "$VALUE"}'
I was expecting the above script would produce ..
{"value" :... (3 Replies)
Discussion started by: atanubanerji
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EVAL(3) 1 EVAL(3)
eval - Evaluate a string as PHP code
SYNOPSIS
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)