Ideas in this flowchart

• PHP arrays can receive elements through indexed assignment or insertion functions.
• An element can be added by providing an index and using the assignment operator.
• PHP provides functions for inserting elements at different positions.
• array_unshift() inserts an element at the beginning of an array.
• array_push() inserts an element at the end of an array.
• array_splice() inserts an element at an arbitrary position.
• The example starts with $arr = array(10, 20, 30).
• array_unshift($arr, 15) changes the array to [15, 10, 20, 30].
• array_push($arr, 25) changes the array to [15, 10, 20, 30, 25].
• array_splice($arr, 3, 0, 35) changes the array to [15, 10, 20, 35, 30, 25].
• A simpler syntax is mentioned, but its syntax is not provided.