You have an array of mixed values: ["10", 20, "30.5", true]. Which PHP code correctly casts all elements to integers using type casting syntax?

hard📝 Application Q8 of 15

PHP - Type Handling

You have an array of mixed values: ["10", 20, "30.5", true]. Which PHP code correctly casts all elements to integers using type casting syntax?

A$ints = array_map(fn($v) => int $v, ["10", 20, "30.5", true]);

B$ints = array_map(fn($v) => int($v), ["10", 20, "30.5", true]);

C$ints = array_map(fn($v) => (integer) $v, ["10", 20, "30.5", true]);

D$ints = array_map('int', ["10", 20, "30.5", true]);

Step-by-Step Solution

Solution:

Step 1: Understand casting each element in array
Use array_map with a function casting each element to integer using (integer) or (int).
Step 2: Evaluate options
$ints = array_map(fn($v) => int $v, ["10", 20, "30.5", true]); uses int $v without parens, invalid syntax. $ints = array_map(fn($v) => (integer) $v, ["10", 20, "30.5", true]); uses (integer), correct. $ints = array_map('int', ["10", 20, "30.5", true]); uses 'int' as string, invalid. $ints = array_map(fn($v) => int($v), ["10", 20, "30.5", true]); uses int() function, invalid.
Step 3: Choose best answer
$ints = array_map(fn($v) => (integer) $v, ["10", 20, "30.5", true]); is correct and uses valid syntax with (integer).
Final Answer:
$ints = array_map(fn($v) => (integer) $v, ["10", 20, "30.5", true]); -> Option C
Quick Check:
Use array_map with (integer) casting function [OK]

Quick Trick: Use array_map with (int) or (integer) casting [OK]

Common Mistakes:

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