[Term Entry] PHP Arrays array_pop()

[codecademy-aditya]

Reason/inspiration (optional)

We would like a new term entry for PHP about the array_pop() function.

The entry should go in a new file in docs/content/php/concepts/arrays/terms/array-pop/array-pop.md (Note the dashes rather than underscores)

The entry should

• Have a syntax section illustrating the function with a ```pseudo code block.
• An example showing the function in use with a ```php code block.
• A runnable codebyte example in a ```codebyte/php block.

Please refer to the entry templates, content standards, and markdown style guide when working on the PR for this issue.

Entry Type (select all that apply)

New Term for Existing Concept Entry

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[phuongtrieu97coder]

I would like to work on this issue

[SSwiniarski]

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[SSwiniarski]

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