/** The name of the database for WordPress */
define('DB_NAME', 'somedbname');

/** MySQL database username */
define('DB_USER', 'someusername');

/** MySQL database password */
define('DB_PASSWORD', 'somerandompassword');

WPDBNAME=somedbname
WPDBUSER=somedbuser
WPDBPASS=somerandompassword

WPDBNAME=`cat wp-config.php | grep DB_NAME | cut -d ' -f 4`
WPDBUSER=`cat wp-config.php | grep DB_USER | cut -d ' -f 4`
WPDBPASS=`cat wp-config.php | grep DB_PASSWORD | cut -d ' -f 4`

mysql -u `cat wp-config.php | grep DB_USER | cut -d ' -f 4` -p`cat wp-config.php | grep DB_PASSWORD | cut -d ' -f 4` -h `cat wp-config.php | grep DB_HOST | cut -d ' -f 4` `cat wp-config.php | grep DB_NAME | cut -d ' -f 4`

awk -F"[()']" '/^define/{printf "%s="%s"n", $3, $5;}' < foo.php

DB_NAME="somedbname"
DB_USER="someusername"
DB_PASSWORD="somerandompassword"

find . -name "wp-config.php" -print0 | xargs -0 -r grep -e "DB_NAME" -e "DB_USER" -e "DB_PASSWORD"

#!/bin/bash

source <(php -r 'require("wp-config.php"); echo("DB_NAME=".DB_NAME."; DB_USER=".DB_USER."; DB_PASSWORD=".DB_PASSWORD); ')
mysqldump --user $DB_USER --password="$DB_PASSWORD" $DB_NAME | gzip > $DB_NAME-$(date +%Y%m%d%H%M%S).sql.gz