Hướng dẫn php constructor multiple parameters
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Result: Constructors are special member functions for initial settings of newly created object instances from a class. In PHP, a constructor is a method named __construct(), which is called by the keyword new after creating the object. Constructors can also accept arguments, in which case, when the new statement is written, you also need to send the constructor arguments for the parameters. Constructors are the very basic building blocks that define the future object and its nature. You can say that the Constructors are the blueprints for object creation providing values for member functions and member variables. Constructor types:
Note: PHP lacks support for declaring multiple constructors of different numbers of parameters for a class unlike languages such as Java. Multiple Constructors: More than one constructor in a single class for initializing instances are available. Example 1: In the following example, we create a script and try to declare multiple constructors. We will assign the name of a student using one constructor and age with another constructor. PHP
Output: PHP Fatal error: Cannot redeclare Student::__construct() in /home/33a7c36527d199adf721ab261035d4f7.php on line 10 We have to use different methods to use Multiple Constructors in PHP. Some are listed below. Approach:
Example 2: PHP
Output Constructor with 1 parameter called: Akshit Constructor with 2 parameters called: Akshit,Nikita Constructor with 3 parameters called: Akshit,Nikita,Ritesh Approach:
Example 3: The following example demonstrates multiple constructors with different data types like string or integer.
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Output Name is initialized using constructor ID : 1 Name : Akshit ID is initialized using constructor ID : 2 Name : Nikita |