Bash question: working with an array of previously set variable strings
while i've used arrays to work with variables, i've never used them to loop through a set of strings and wanted to ask the community for some feedback or assistance.
let me be specific. here's my code:
Code:
# URL port Variables
port2195=`nc -z $url2195 2195`
port2196=`nc -z $url2196 2196`
port5223=`nc -z $url5223 5223`
port443=`nc -z $url443 443`
# Set array
range=( port2195 port2196 port5223 port443 )
echo ""
echo "Now checking the ports..."
echo ""
for i in "${range[@]}"
do
if [[ "$i" = *succeeded* ]];
then
echo "SUCCESS: $i is open/working."
else
echo "FAILURE: $i is NOT open/working."
fi
done
this code works just fine.... just not in the way that i want!
the script is passing the members of the array exactly as i've typed them, one at a time: port2195, port2196, port5223, etc.
what i'm trying to do and failing to achieve is to pass each member of the array as a previously established string: $port2195, $port2196, $port5223, etc.
changing the names of each member of the array to include a "$", doesn't work, neither does adding a second "$" into the if statement.
i'm not even sure if you can pass strings via an array but, if it is possible, much obliged for someone to drop me a few pointers.
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LEARN ABOUT PHP
apc_exists
APC_EXISTS(3) 1 APC_EXISTS(3)apc_exists - Checks if APC key existsSYNOPSIS
mixed apc_exists (mixed $keys)
DESCRIPTION
Checks if one or more APC keys exist.
PARAMETERS
o $keys
- A string, or an array of strings, that contain keys.
RETURN VALUES
Returns TRUE if the key exists, otherwise FALSE Or if an array was passed to $keys, then an array is returned that contains all existing
keys, or an empty array if none exist.
EXAMPLES
Example #1
apc_exists(3) example
<?php
$fruit = 'apple';
$veggie = 'carrot';
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apc_store('bar', $veggie);
if (apc_exists('foo')) {
echo "Foo exists: ";
echo apc_fetch('foo');
} else {
echo "Foo does not exist";
}
echo PHP_EOL;
if (apc_exists('baz')) {
echo "Baz exists.";
} else {
echo "Baz does not exist";
}
echo PHP_EOL;
$ret = apc_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);
?>
The above example will output something similar to:
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
SEE ALSO apc_cache_info(3), apc_fetch(3).
PHP Documentation Group APC_EXISTS(3)