Get a value from an object or an array. Allows the ability to fetch a nested value from a heterogeneous multidimensional collection using dot notation.

get-value.php

<?php

/**
 * Get a value from an object or an array.  Allows the ability to fetch a nested value from a
 * heterogeneous multidimensional collection using dot notation.
 *
 * @param array|object $data
 * @param string       $key
 * @param mixed        $default
 * @return mixed
 */
function get_value( $data, $key, $default = null ) {
	$value = $default;
	if ( is_array( $data ) && array_key_exists( $key, $data ) ) {
		$value = $data[$key];
	} else if ( is_object( $data ) && property_exists( $data, $key ) ) {
		$value = $data->$key;
	} else {
		$segments = explode( '.', $key );
		foreach ( $segments as $segment ) {
			if ( is_array( $data ) && array_key_exists( $segment, $data ) ) {
				$value = $data = $data[$segment];
			} else if ( is_object( $data ) && property_exists( $data, $segment ) ) {
				$value = $data = $data->$segment;
			} else {
				$value = $default;
				break;
			}
		}
	}
	return $value;
}

what of in this senerio

{ "full_details_acknowledgement": "10", "offer_letter_acknowledgement": "10", "offer_letter": "10", "offer_letter_variables": [ "basic_salary", "housing_allowance", "transport_allowance", "meal", "entertainment", "hazard_allowance", "leave_allowance", "utility", "monthly_gross_salary", "statutory_deductions", "employee_pension", "payee_tax", "total_deductions", "net_monthly_salary", "austin" ], "company": "global-manpower" }

and we want to access offer_letter_variables

@thomsontochi

<?php
$json = '{ "full_details_acknowledgement": "10", "offer_letter_acknowledgement": "10", "offer_letter": "10", "offer_letter_variables": [ "basic_salary", "housing_allowance", "transport_allowance", "meal", "entertainment", "hazard_allowance", "leave_allowance", "utility", "monthly_gross_salary", "statutory_deductions", "employee_pension", "payee_tax", "total_deductions", "net_monthly_salary", "austin" ], "company": "global-manpower" }';
$data = json_decode( $json );
get_value( $data, 'offer_letter_variables', [] );

The third parameter just sets the default value to be an empty array, since that is what is expected to be returned.