Retrieving Max value(select query) from MySQL using PHPSECLIB -

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i able connect remote server , mysql tables using phpseclib. unable fetch max value of column , try insert table. output getting max(test_id) 1. not sure might going wrong?

$value = $ssh->exec("mysql -h localhost -u root -pxxxx dbname -e \"select max(test_id) cpu_util_all;\"");  echo "$value"; - output : max(test_id) 1  echo $ssh->exec("mysql -h localhost -u root -pxxxx dbname -e \"insert  test_execution (test_id) values ('$value');\"");


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