I can't tell why code I can't see isn't working. Please show your code.
I doubt that the dollar sign causes the problem, though. Shell is quite careful not to interpret dollar signs in strings as variables -- only in the shell's code itself is the value special.
Variables inside single quotes don't work, variables inside double quotes are expanded. This might be the issue.
Last edited by Corona688; 09-20-2017 at 07:32 PM..
Hi,
How can I get this to work?
#!/bin/ksh
if ; then
direction=">>"
else
direction=">"
fi
cat some_file_name $direction temp.txt
exit
This shell script is not happy with using "$direction" opposed to ">" or ">>".
Thanks. (5 Replies)
Hi,
I have a data file delimited by Ω symbol, I would like to use this in grep and cut command. but How to type this Omega symbol.
Thanks
Murugesan (1 Reply)
Hi
Thanks for this amazing forum first, I've been searching answers in it for problems that I've encountered at work.
The only problem I haven't been able to find a fix for, is a ever waiting for prompt problem in Expect when encounter a $ prompt.
I usually set the timeout to -1 cause the... (2 Replies)
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
I have a target directory, there are some files and directories in "target_dir".
I have a symbol link: my_link -> <target_dir>
The target directory name is NOT known to the script (because it is varying), while the link name is always fixed.
In a shell script, how to remove both the... (1 Reply)
hi,
I have been trying to acheive the following task for a while now, but failed.. Need help, experts please help!
This is what I am trying to do:
- I am writing to a flat file the name of the source to be copied and the destination path as to where it is to be copied to.
Sample flat file:... (7 Replies)
Hi Team,
Can you please help me to resolve this issue.
Am unable to use this $ symbol in sql query in the shell script.
For Example:
# !/bin/sh
export USER_NAME=XXX
export PASSWORD=YYY
export ORACLE_SID=xamdb
echo $ORACLE_SID
echo " Session Details ..."
... (1 Reply)
I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist.
diff=$1$2.diff
id=$2 new=new_$diff
echo "My id is $1"
echo "I want to sync for user account $id"
##awk command I am using is as below
cat $diff | awk... (2 Replies)
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
LEARN ABOUT PHP
echo
ECHO(3) 1 ECHO(3)echo - Output one or more stringsSYNOPSIS
void echo (string $arg1, [string $...])
DESCRIPTION
Outputs all parameters.
echo is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo (unlike some other
language constructs) does not behave like a function, so it cannot always be used in the context of a function. Additionally, if you want
to pass more than one parameter to echo, the parameters must not be enclosed within parentheses.
echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syn-
tax only works with the short_open_tag configuration setting enabled.
I have <?=$foo?> foo.
PARAMETERS
o $arg1
- The parameter to output.
o $...
-
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
echo examples
<?php
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans
multiple lines. The newlines will be
output as well.";
echo "Escaping characters is done "Like this".";
// You can use variables inside of an echo statement
$foo = "foobar";
$bar = "barbaz";
echo "foo is $foo"; // foo is foobar
// You can also use arrays
$baz = array("value" => "foo");
echo "this is {$baz['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
echo 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just echo variables
echo $foo; // foobar
echo $foo,$bar; // foobarbarbaz
// Some people prefer passing multiple parameters to echo over concatenation.
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "
";
echo <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
SEE ALSO print(3), printf(3), flush(3), Heredoc syntax.
PHP Documentation Group ECHO(3)