[5.3] better use str_starts_with

[heelc29]

Follow-Pull Request for #44875 and #44938
@joomdonation

Summary of Changes

Better use str_starts_with if a substr command (or concatenate string) comes after it

Testing Instructions

code review?

Actual result BEFORE applying this Pull Request

?

Expected result AFTER applying this Pull Request

better checked string before perform action

Link to documentations

Please select:

• No documentation changes for docs.joomla.org needed
• No documentation changes for manual.joomla.org needed

[joomdonation]

I have tested this item ✅ successfully on 7cfaf0a

Yes, it's better. Thanks @heelc29

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[QuyTon]

I have tested this item ✅ successfully on 7cfaf0a

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[QuyTon]

RTC

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[HLeithner]

thx