Given an array $numbers = [3, 1, 4, 1, 5], which code snippet correctly sorts it in ascending order using the spaceship operator in a custom comparison function?

hard📝 Application Q15 of 15

PHP - Operators

Given an array $numbers = [3, 1, 4, 1, 5], which code snippet correctly sorts it in ascending order using the spaceship operator in a custom comparison function?

Ausort($numbers, fn($a, $b) => $a == $b);

Busort($numbers, fn($a, $b) => $a <=> $b);

Csort($numbers, fn($a, $b) => $a <=> $b);

Dusort($numbers, fn($a, $b) => $b <=> $a);

Step-by-Step Solution

Solution:

Step 1: Understand sorting with spaceship operator
To sort ascending, compare $a and $b with $a <=> $b.
Step 2: Check correct function usage
usort accepts a comparison function; sort does not take a callback.
Final Answer:
usort($numbers, fn($a, $b) => $a <=> $b); -> Option B
Quick Check:
Ascending sort uses $a <=> $b with usort [OK]

Quick Trick: Use usort with fn($a,$b) => $a <=> $b for ascending sort [OK]

Common Mistakes:

Using sort() with a callback function
Reversing $a and $b for ascending order
Using equality check instead of comparison

Master "Operators" in PHP

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More PHP Quizzes

Given an array $numbers = [3, 1, 4, 1, 5], which code snippet correctly sorts it in ascending order using the spaceship operator in a custom comparison function?

Step 1: Understand sorting with spaceship operator

Step 2: Check correct function usage

Final Answer:

Quick Check:

Want More Practice?