PHP - Type Handling
What will be the output of the following PHP code?
$var = null;
echo isset($var) ? 'Yes' : 'No';
What will be the output of the following PHP code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand isset() with null
isset() returns false if variable is null.Step 2: Evaluate ternary expression
Since isset($var) is false, ternary returns 'No'.Final Answer:
No -> Option AQuick Check:
isset(null) = false [OK]
Quick Trick: isset() returns false for null variables [OK]
Common Mistakes:
- Expecting 'Yes' for null
- Confusing isset() with empty()
- Thinking null prints as string
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