You have an array $data = [10, 20, 30, 40, 50, 60]. Using array_splice, how do you replace elements 20, 30, and 40 with 21 and 31?

hard📝 Application Q8 of 15

PHP - Array Functions

You have an array $data = [10, 20, 30, 40, 50, 60]. Using array_splice, how do you replace elements 20, 30, and 40 with 21 and 31?

Aarray_splice($data, 2, 3, [21, 31]);

Barray_splice($data, 1, 3, [21, 31]);

Carray_splice($data, 1, 2, [21, 31]);

Darray_splice($data, 0, 3, [21, 31]);

Step-by-Step Solution

Solution:

Step 1: Identify indexes of elements to replace
Elements 20, 30, 40 are at indexes 1, 2, and 3.
Step 2: Use array_splice to replace 3 elements starting at index 1
array_splice($data, 1, 3, [21, 31]) removes 3 elements and inserts 21 and 31.
Final Answer:
array_splice($data, 1, 3, [21, 31]); -> Option B
Quick Check:
Replace 3 elements at index 1 with 2 elements = array_splice($data, 1, 3, [21, 31]); [OK]

Quick Trick: array_splice(start, length, new_array) replaces elements [OK]

Common Mistakes:

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