Intermediate
PHP
Q81 / 100
What is PHP's array_walk() function?
Correct! Well done.
Incorrect.
The correct answer is B) Applies a callback to each element of an array by reference, modifying the array in place
B
Correct Answer
Applies a callback to each element of an array by reference, modifying the array in place
Explanation
array_walk($arr, function(&$val, $key) { $val = strtoupper($val); }) modifies values in place. Return value is bool, not the modified array.
Progress
81/100