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Top Forums UNIX for Dummies Questions & Answers Difference between echo `ls -l` and echo "`ls -l`" ? Post 302912079 by Corona688 on Tuesday 5th of August 2014 03:44:08 PM
Old 08-05-2014
Well, for starters -- it's a pretty silly thing to do, either way. Why do echo "`command`" when you could just do command ?

But the difference is, quotes prevent a string from splitting on whitespace. Spaces, tabs and newlines all count as whitespace. If you do VAR="a b c", and use $VAR without putting it into quotes, the shell will split it in three.

So, quoted, it ends up being:

Code:
echo "one
incredibly
long
string
crammed
into
a
single
argument
containing
actual,
real
line
breaks
printed
literally"

And the unquoted way ends up being:

Code:
echo "one" "incredibly" "long" "string" "where" "each" "whitespace" "separated" "section" "becomes" "its" "own" "individual" "separate" "argument"

This is also one of many reasons why for LINE in `command` is a poor idea. It splits on whitespace, not lines.
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SSH2_METHODS_NEGOTIATED(3)						 1						SSH2_METHODS_NEGOTIATED(3)

ssh2_methods_negotiated - Return list of negotiated methods

SYNOPSIS
array ssh2_methods_negotiated (resource $session) DESCRIPTION
Returns list of negotiated methods. PARAMETERS
o $session - An SSH connection link identifier, obtained from a call to ssh2_connect(3). RETURN VALUES
EXAMPLES
Example #1 Determining what methods were negotiated <?php $connection = ssh2_connect('shell.example.com', 22); $methods = ssh2_methods_negotiated($connection); echo "Encryption keys were negotiated using: {$methods['kex']} "; echo "Server identified using an {$methods['hostkey']} with "; echo "fingerprint: " . ssh2_fingerprint($connection) . " "; echo "Client to Server packets will use methods: "; echo " Crypt: {$methods['client_to_server']['crypt']} "; echo " Comp: {$methods['client_to_server']['comp']} "; echo " MAC: {$methods['client_to_server']['mac']} "; echo "Server to Client packets will use methods: "; echo " Crypt: {$methods['server_to_client']['crypt']} "; echo " Comp: {$methods['server_to_client']['comp']} "; echo " MAC: {$methods['server_to_client']['mac']} "; ?> SEE ALSO
ssh2_connect(3). PHP Documentation Group SSH2_METHODS_NEGOTIATED(3)
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