Fix/inspections potential issues

[Dillon-Brown]

Description

• Continue misbehaviour in switch.
• DateTime constants usage validity.
  -```file_put_contents()`` race condition.
• 'mkdir(...)' race condition
• Strings N-character comparison flaws
• Substring comparison flaws
• Fixed binary operations

Motivation and Context

1. See PHP continue docs.
2. DATE_ATOM should be used for compatibility with ISO-8601 instead. See docs.
3. LOCK_EX flag should be used to prevent race condition.
4. Fix for potential race condition when several processes are attempting to create a directory which does not yet exist.
5. The specified length doesn't match the string length.
6. The specified length doesn't match the string length.
7. Fixed a variety of binary operation issues (Misplaced operators, hardcoded booleans).

How To Test This

See Travis, this should not change existing functionality.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (hotfix-7.10.x@e56281d). Click here to learn what that means.
The diff coverage is 9.24%.

@@               Coverage Diff                @@
##             hotfix-7.10.x    #7197   +/-   ##
================================================
  Coverage                 ?    7.27%           
================================================
  Files                    ?     3694           
  Lines                    ?   385741           
  Branches                 ?        0           
================================================
  Hits                     ?    28051           
  Misses                   ?   357690           
  Partials                 ?        0

[Mac-Rae]

Assessed by Travis 👍

However, Needs conflicts sorted before merge

[codecov-commenter]

Codecov Report

Merging #7197 into hotfix-7.10.x will increase coverage by 0.00%.
The diff coverage is 14.77%.

@@              Coverage Diff               @@
##           hotfix-7.10.x    #7197   +/-   ##
==============================================
  Coverage          10.70%   10.70%           
==============================================
  Files               3229     3229           
  Lines             240902   240907    +5     
==============================================
+ Hits               25798    25799    +1     
- Misses            215104   215108    +4     

[SuiteBot]

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