Why does strpos return false instead of 0 when the substring is not found, and how should you check its result?

hard📝 Conceptual Q10 of 15

PHP - String Functions

Why does strpos return false instead of 0 when the substring is not found, and how should you check its result?

ABecause 0 is a valid position; check with strict !== false to avoid confusion

BBecause 0 means substring found at start; use == false to check absence

CBecause strpos always returns boolean; use if(strpos()) to check presence

DBecause strpos returns length of substring; compare with 0 for absence

Step-by-Step Solution

Solution:

Step 1: Understand return values of strpos
strpos returns 0 if substring is at start, false if not found.
Step 2: Correct way to check result
Use strict comparison !== false to distinguish 0 (found) from false (not found).
Final Answer:
Because 0 is a valid position; check with strict !== false to avoid confusion -> Option A
Quick Check:
Use strict !== false to check strpos result [OK]

Quick Trick: Use strict !== false to check strpos result safely [OK]

Common Mistakes:

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