Consider this PHP code to sort an array of strings ignoring case sensitivity. Which spaceship operator usage is correct inside the comparison function?

hard📝 Application Q9 of 15

PHP - Operators

Ausort($arr, fn($a, $b) => strcasecmp($a, $b) <=> 0);

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

Cusort($arr, fn($a, $b) => strtolower($a) <=> strtolower($b));

Dusort($arr, fn($a, $b) => strcmp($a, $b));

Step-by-Step Solution

Solution:

Step 1: Understand case-insensitive comparison
To ignore case, convert both strings to lowercase before comparing.
Step 2: Identify correct spaceship usage
usort($arr, fn($a, $b) => strtolower($a) <=> strtolower($b)); converts both strings to lowercase and compares with <=>, which is correct.
Final Answer:
usort($arr, fn($a, $b) => strtolower($a) <=> strtolower($b)); -> Option C
Quick Check:
Lowercase both strings before <=> for case-insensitive sort [OK]

Quick Trick: Convert strings to lowercase before <=> for case-insensitive sort [OK]

Common Mistakes:

Using strcasecmp with <=> incorrectly
Not handling case sensitivity
Using strcmp without case handling

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Consider this PHP code to sort an array of strings ignoring case sensitivity. Which spaceship operator usage is correct inside the comparison function?

Step 1: Understand case-insensitive comparison

Step 2: Identify correct spaceship usage

Final Answer:

Quick Check:

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