PHP - Operators
You want to filter an array to keep only elements that are exactly integer 0, excluding string '0'. Which comparison operator should you use in PHP?
You want to filter an array to keep only elements that are exactly integer 0, excluding string '0'. Which comparison operator should you use in PHP?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand filtering requirement
We want to keep only elements that are integer 0, not string '0'. So type matters.Step 2: Choose operator that checks type and value
Strict equality (===) checks both value and type, so it excludes string '0'.Final Answer:
=== -> Option DQuick Check:
Strict equality === filters exact type and value [OK]
Quick Trick: Use === to match exact type and value [OK]
Common Mistakes:
- Using == which allows type conversion
- Using != or !== which exclude 0
- Ignoring type difference in filtering
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