T13954 Arr::whiteList()

[emiliodeg]

Hello!

• Type: new feature | code quality
• Link to issue: Add more methods to Helpers Array/String #13954

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Small description of change:
It's a little function to get some elements by key from a whitelist of keys
Thanks

[codecov]

Codecov Report

Merging #14182 into 4.0.x will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #14182      +/-   ##
==========================================
+ Coverage   74.64%   74.64%   +<.01%     
==========================================
  Files         455      455              
  Lines       94417    94441      +24     
==========================================
+ Hits        70473    70497      +24     
  Misses      23944    23944

Impacted Files	Coverage Δ
ext/phalcon.c	97.65% <0%> (ø)	⬆️
ext/phalcon/helper/arr.zep.c	98.47% <0%> (+0.08%)	⬆️

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[niden]

Thank you @emiliodeg