Fix PHP version formatting

[patrikziduliak]

Description
There were two issues with PHP version formatting I found. First, more importantly, was that PHP substring itself was matched after grepping php -v. When I execute php -v, there are some warnings however, such as:

PHP Warning:  PHP Startup: Unable to load dynamic library 'pdo_pgsql' (tried: /usr/local/Cellar/php/7.2.3_3/lib/php/20170718/pdo_pgsql (dlopen(/usr/local/Cellar/php/7.2.3_3/lib/php/20170718/pdo_pgsql, 9): image not found), /usr/local/Cellar/php/7.2.3_3/lib/php/20170718/pdo_pgsql.so (dlopen(/usr/local/Cellar/php/7.2.3_3/lib/php/20170718/pdo_pgsql.so, 9): image not found)) in Unknown on line 0

These warnings are also matched, and then, awk prints out empty lines. I fixed the pattern so that the version number is not optional.

Also, I added a space before version number, so that it is more consistent (see Node version in the same screenshot).

Screenshot
Before:

After:

[salmanulfarzy]

Thank you for the PR @patrikziduliak.

[salmanulfarzy]

This is not needed. An empty space is defined with variable.

https://github.com/denysdovhan/spaceship-prompt/blob/5a391a571a0a05a038d880e7359228f6c3525511/sections/php.zsh#L14

This might have to do with your terminal unicode width settings. Also note your overlapping package symbol.

[salmanulfarzy]

Looks good.