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Why do functions improve the maintainability of PHP code?

hard📝 Conceptual Q10 of 15
PHP - Functions
Why do functions improve the maintainability of PHP code?
ABecause they prevent the use of variables
BBecause they make the code run faster automatically
CBecause they hide all errors from the programmer
DBecause they allow changing code in one place instead of many
Step-by-Step Solution
Solution:

  1. Step 1: Understand maintainability

    Maintainability means it is easy to update and fix code later.

  2. Step 2: See how functions help maintainability

    Functions let you change code inside them once, affecting all uses, avoiding repeated fixes.

  3. Final Answer:

    Because they allow changing code in one place instead of many -> Option D

  4. Quick Check:

    Functions centralize code changes = D [OK]
Quick Trick: Change function code once to update all uses [OK]
Common Mistakes:
  • Thinking functions speed up code automatically
  • Believing functions hide errors

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