Solution:Step 1: Understand boolean casting rules in PHPEmpty string and '0' cast to false; non-empty strings cast to true.Step 2: Apply casting to each array element'1' and '2.5' become true; '' and '0' become false.Final Answer:['a' => true, 'b' => true, 'c' => false, 'd' => false] -> Option DQui

[Solved] Given the code:$data = ['a' => '1', 'b' => '2.5', 'c' => '', 'd' => '0'];$result = array_map(fn($v) => (bool) $v, $data);print_r($result);What is the output? | PHP

PHP - Type Handling

Given the code:

$data = ['a' => '1', 'b' => '2.5', 'c' => '', 'd' => '0'];
$result = array_map(fn($v) => (bool) $v, $data);
print_r($result);

What is the output?

AError due to invalid casting

B['a' => true, 'b' => true, 'c' => true, 'd' => true]

C['a' => 1, 'b' => 1, 'c' => 0, 'd' => 0]

D['a' => true, 'b' => true, 'c' => false, 'd' => false]

Step-by-Step Solution

Solution:

Step 1: Understand boolean casting rules in PHP
Empty string and '0' cast to false; non-empty strings cast to true.
Step 2: Apply casting to each array element
'1' and '2.5' become true; '' and '0' become false.
Final Answer:
['a' => true, 'b' => true, 'c' => false, 'd' => false] -> Option D
Quick Check:
Empty string and '0' cast to false [OK]

Quick Trick: Empty string and '0' cast to false boolean [OK]

Common Mistakes:

Assuming all strings cast to true
Confusing '0' with true
Expecting numeric cast instead of boolean

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More PHP Quizzes

Given the code:

Step 1: Understand boolean casting rules in PHP

Step 2: Apply casting to each array element

Final Answer:

Quick Check:

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