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Full Discussion: Pattern Matching
Top Forums Shell Programming and Scripting Pattern Matching Post 302306282 by Aveltium on Sunday 12th of April 2009 06:34:45 AM
Old 04-12-2009
Pattern Matching

Hi, I'm very new to Linux and I'm sorry if this question is too dumb.
If it is ok, please link me to some beginner guides for questions like this one.

I want to check if the entered string is a number and has 4 digits.

I heard that I should use "regular expression" or something like that to accomplish this task, but I don't know how to use it.

Code:
echo -n "Input: ";read x
if [ $x == ${...err i dont know what to put here} ];then echo "Valid"
else echo "Invalid";fi

Any help is much appreciated! Smilie
 

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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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