fix: resolve PDO WeakMap warning

[ycchuang99]

Replace comparison operators with null coalescing operator to fix undefined array error.

Fixes #1529

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.42%. Comparing base (5c9ab13) to head (fd5017d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #334   +/-   ##
=========================================
  Coverage     80.42%   80.42%           
+ Complexity     1502     1500    -2     
=========================================
  Files           128      128           
  Lines          6176     6176           
=========================================
  Hits           4967     4967           
  Misses         1209     1209           

Flag	Coverage Δ
Aws	85.55% <ø> (ø)
Context/Swoole	0.00% <ø> (ø)
Instrumentation/CakePHP	20.27% <ø> (ø)
Instrumentation/CodeIgniter	73.77% <ø> (ø)
Instrumentation/Curl	90.42% <ø> (ø)
Instrumentation/ExtAmqp	89.26% <ø> (ø)
Instrumentation/ExtRdKafka	86.23% <ø> (ø)
Instrumentation/Guzzle	69.51% <ø> (ø)
Instrumentation/HttpAsyncClient	78.31% <ø> (ø)
Instrumentation/IO	70.68% <ø> (ø)
Instrumentation/Laravel	62.68% <ø> (ø)
Instrumentation/MongoDB	74.28% <ø> (ø)
Instrumentation/MySqli	95.81% <ø> (ø)
Instrumentation/OpenAIPHP	87.31% <ø> (ø)
Instrumentation/PDO	90.15% <100.00%> (ø)
Instrumentation/Psr14	77.14% <ø> (ø)
Instrumentation/Psr15	89.41% <ø> (ø)
Instrumentation/Psr16	97.56% <ø> (ø)
Instrumentation/Psr18	77.77% <ø> (ø)
Instrumentation/Psr3	59.49% <ø> (ø)
Instrumentation/Psr6	97.67% <ø> (ø)
Instrumentation/Slim	86.30% <ø> (ø)
Instrumentation/Symfony	84.93% <ø> (ø)
Instrumentation/Yii	77.68% <ø> (ø)
Logs/Monolog	100.00% <ø> (ø)
Propagation/TraceResponse	100.00% <ø> (ø)
ResourceDetectors/Azure	91.66% <ø> (ø)
ResourceDetectors/Container	93.02% <ø> (ø)
Sampler/RuleBased	33.51% <ø> (ø)
Shims/OpenTracing	92.45% <ø> (ø)
Symfony	87.81% <ø> (ø)

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Files with missing lines	Coverage Δ
src/Instrumentation/PDO/src/PDOTracker.php	76.27% <100.00%> (ø)

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[brettmc]

@ycchuang99 can you please check the psalm errors reported against PDO? I think they're related to this fix.

looks ok, but build failures to be fixed

[ycchuang99]

@brettmc Thanks for the reminder! I will take a look at it.

[ycchuang99]

Hi @brettmc,

I've fixed the Psalm errors, but I'm not sure if it's the proper way to resolve them. Could you review the changes and let me know if any adjustments are needed? Thanks!