{"id":3891,"date":"2018-10-09T11:00:55","date_gmt":"2018-10-09T11:00:55","guid":{"rendered":"http:\/\/ebhor.com\/?p=3891"},"modified":"2019-11-08T11:28:58","modified_gmt":"2019-11-08T11:28:58","slug":"php-constructor-and-destructor","status":"publish","type":"post","link":"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/","title":{"rendered":"PHP Constructor and Destructor"},"content":{"rendered":"\n

If the user wants to access any member function of a class then he or she must create the object<\/g> first then call the member function by this object.<\/p>\n\n\n\n

The constructor<\/g> is a method or way which automatically called when an object the for a class.<\/p>\n\n\n\n

No need to call it by an object. Simply constructor is a function which called when object<\/g> creates of class.<\/p>\n\n\n\n

Constructor declares by two ways.<\/p>\n\n\n\n

  1. Define function name same as class name. (This is old way to declare constructor. It is use in PHP 5.3.3 version)<\/li>
  2. Define function by __construct keyword.<\/li><\/ol>\n\n\n\n

    Only one constructor creates in one class. It is used to run an<\/g> operation which needs to run at first of any other operation.<\/p>\n\n\n\n

    Like Database Connection. The constructor<\/p>\n\n\n\n

    Example:<\/strong><\/p>\n\n\n\n

    \ncpu = $c;\n\t\t $this->ram = $r;\n\t\t $this->hdd = $h;\n\t }\n\t function describe()\n\t {\n       echo \"Hello, I am a Computer. My CPU is $this->cpu GHz, with $this->ram GB RAM and $this->hdd GB Hard Disk\";  \n\t }\n }\n $dell = new Computer(2.4, 4, 512);\n $dell->describe();\n?>\n<\/pre>\n\n\n\n
    Output:<\/strong><\/p>\n\n\n\n
    \nHello, I am a Computer. My CPU is 2.4GHz, with 4 GB RAM and 512 GB Hard Disk.\n<\/pre>\n\n\n\n
    Explanation:<\/g><\/strong><\/p>\n\n\n\n
    In above example $dell is an object of Computer class when its created constructor automatically called and CPU, RAM and Hard disk value passed by parameter.<\/p>\n\n\n\n
    Then when called describe() function its return the whole value<\/p>\n\n\n\n
    Destructor<\/strong><\/h2>\n\n\n\n
    the <\/g> is also a method or way in OOPS which is opposite of Constructor.<\/p>\n\n\n\n
    Destructor also called automatically when object an of any class but it\u2019s run when The constructor creates.<\/p>\n\n\n\n
    It the for free up memory. Using this after complete a task unset all variable and re The constructor<\/g><\/g> it in next<\/g> program.<\/p>\n\n\n\n
    Destructor defines by __destruct keyword. an <\/g> is also a function which automatically called when object The constructor.<\/p>\n\n\n\n
    Example:<\/strong><\/p>\n\n\n\n
    \nI'm dead now :(\";\n    }\n\n    public function __construct($name)\n    {\n        echo \"I'm alive!\";    \n        $this->name = $name;\n    }\n}\n$animal = new Animal(\"Bob\");\necho \"Name of the animal: \" . $animal->name;\n?>\n<\/pre>\n\n\n\n
    Output<\/strong><\/p>\n\n\n\n
    I'm alive! Name of the animal: Bob\nI\u2019m dead now \uf04c\n\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
    If the user wants to access any member function of a class then he or she must create the object first then call the member function by this object. The constructor is a method or way which automatically called when an object the for a class. No need to call it by an object. Simply constructor is a … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[188,220,7],"yoast_head":"\nPHP Constructor and Destructor - Ebhor.com<\/title>\n<meta name=\"description\" content=\"PHP Constructor and Destructor with need definition explanation program and example. step by step description in easy way\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP Constructor and Destructor - Ebhor.com\" \/>\n<meta property=\"og:description\" content=\"PHP Constructor and Destructor with need definition explanation program and example. step by step description in easy way\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\" \/>\n<meta property=\"og:site_name\" content=\"Ebhor.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/ebhorcom\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-10-09T11:00:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-11-08T11:28:58+00:00\" \/>\n<meta name=\"author\" content=\"manish\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"manish\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\"},\"author\":{\"name\":\"manish\",\"@id\":\"https:\/\/www.ebhor.com\/#\/schema\/person\/6a63908fdbbb27289970569ebd2e709b\"},\"headline\":\"PHP Constructor and Destructor\",\"datePublished\":\"2018-10-09T11:00:55+00:00\",\"dateModified\":\"2019-11-08T11:28:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\"},\"wordCount\":247,\"publisher\":{\"@id\":\"https:\/\/www.ebhor.com\/#organization\"},\"keywords\":[\"constructor\",\"destructor\",\"php\"],\"articleSection\":[\"php\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\",\"url\":\"https:\/\/www.ebhor.com\/php-constructor-and-destructor\/\",\"name\":\"PHP Constructor and Destructor - 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