You have an array $data = ['1', '2', '3abc', '0', 'true', 'false'];. How can you convert all elements to integers using settype inside a foreach loop that declares both a key and value variable?
hard📝 Application Q8 of 15
PHP - Type Handling
You have an array $data = ['1', '2', '3abc', '0', 'true', 'false'];. How can you convert all elements to integers using settype inside a foreach loop that declares both a key and value variable?
Aforeach ($data as &$value) { settype($value, 'int'); }
Bforeach ($data as $value) { settype($value, 'int'); }
Cforeach ($data as $key => &$value) { settype($value, 'int'); }
Dforeach ($data as $key => $value) { settype($value, 'int'); }
Step-by-Step Solution
Solution:
Step 1: Understand passing by reference
To modify array elements inside a loop, use reference (&$value) to change original values.
Step 2: Check options
foreach ($data as $key => &$value) { settype($value, 'int'); } uses reference and key, allowing settype to modify each element correctly.
Final Answer:
foreach ($data as $key => &$value) { settype($value, 'int'); } -> Option C
Quick Check:
Use references to modify array elements with settype [OK]
Quick Trick:Use & to modify array elements inside foreach [OK]
Common Mistakes:
Not using reference, so original array unchanged
Modifying copy of value instead of original
Using wrong loop syntax
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