Working with arrays, including indexed arrays, associative arrays, and multidimensional arrays Mocktest

Indexed arrays in PHP use integer indices, starting from zero, to access elements.

Associative arrays in PHP use key-value pairs to access elements, where each element is associated with a specific key.

The output of the code will be "Green" because indexed arrays in PHP use integer indices to access elements, starting from zero. In this case, $colors[1] refers to the second element of the array, which is "Green".

The foreach loop is commonly used in PHP to iterate over elements of an array, as it provides a simple and concise syntax for iterating through all elements of an array without needing to know its length or explicitly managing the index variable.

The output of the code will be 30 because associative arrays in PHP use key-value pairs to access elements, where each element is associated with a specific key. In this case, $person["age"] refers to the value associated with the key "age", which is 30.

The correct syntax for creating a multidimensional array in PHP is $array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));. Each nested array() represents a separate dimension of the array.

The output of the code will be 6 because multidimensional arrays in PHP use two sets of indices to access elements: the first index represents the row number, and the second index represents the column number. In this case, $matrix[1][2] refers to the element in the second row (index 1) and the third column (index 2), which is 6.

The count() function in PHP is used to determine the number of elements in an array, regardless of whether it is indexed or associative.

The output of the code will be 5 because the count() function in PHP returns the number of elements in an array. In this case, the $numbers array contains 5 elements, so count($numbers) will return 5.

The array_push() function in PHP is used to add one or more elements to the end of an array.