Avoid PHP_PORT variable name as it conflicts with "links: php:php" #6
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In ECS template we use links: php:php which generate an environment variable called PHP_PORT (which contain a string like "tcp://172.17.0.4:9000") and this conflicts with our own "internal" variable. So we use another name that is non-conflicting.
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In an ECS template we might want to use
links: php:phpwhich generate an environment variable calledPHP_PORT(which contain a string like "tcp://172.17.0.4:9000") and this conflicts with our own "internal" variable.See https://docs.docker.com/network/links/#environment-variables
So we use another name that is non-conflicting.