Given an array $items = ['pen' => 3, 'book' => 5, 'eraser' => 2], write a foreach loop to create a new array $doubled where each value is doubled. Which code snippet correctly does this?

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PHP - Loops

Given an array $items = ['pen' => 3, 'book' => 5, 'eraser' => 2], write a foreach loop to create a new array $doubled where each value is doubled. Which code snippet correctly does this?

A$doubled = []; foreach ($items as $key => $value) { $doubled[$key] = $value * 2; }

B$doubled = []; foreach ($items as $value) { $doubled[] = $value * 2; }

Cforeach ($items as $key => $value) { $doubled[] = $key * 2; }

D$doubled = []; foreach ($items as $key, $value) { $doubled[$key] = $value * 2; }

Step-by-Step Solution

Solution:

Step 1: Understand the goal
Create a new array with the same keys but values doubled.
Step 2: Check foreach syntax and assignment
$doubled = []; foreach ($items as $key => $value) { $doubled[$key] = $value * 2; } correctly uses key-value syntax and assigns doubled values preserving keys.
Final Answer:
$doubled = []; foreach ($items as $key => $value) { $doubled[$key] = $value * 2; } -> Option A
Quick Check:
Use key => value and assign doubled value to new array [OK]

Quick Trick: Use $newArray[$key] = $value * 2 inside foreach [OK]

Common Mistakes:

Ignoring keys when assigning
Using wrong foreach syntax
Multiplying keys instead of values

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Given an array $items = ['pen' => 3, 'book' => 5, 'eraser' => 2], write a foreach loop to create a new array $doubled where each value is doubled. Which code snippet correctly does this?

Step 1: Understand the goal

Step 2: Check foreach syntax and assignment

Final Answer:

Quick Check:

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