Answer Posted / amitverma

class DB {
private static $_singleton;
private $_connection;

private function __construct(){
$this->_connection = mysql_connect();
}

public static function getInstance(){
if (is_null (self::$_singleton)) {
self::$_singleton = new DB();
}
return self::$_singleton;
}
}

$db = DB::getInstance();

Explain the difference between $message and $$message?

560

---

Can php replace javascript?

536

---

What is difference between php and wordpress?

507

---

What is orm in php framework?

502

---

What is the difference between null and empty?

585

---

---

i m a B.E,passed out few yrs bak failed to find good job due to less marks now thinkin of a career as PHP developer. is it a lucarative field and wat r career prospects; hv heard dat initial salary is very less bout 6k also most jobs r contrct jobs.pls guide me need ur valuable advice.pls hellppp!! thnx..

1679

---

So if md5() generates the most secure hash, why would you ever use the less secure crc32() and sha1()?

559

---

What types of MYSQL function available for affecting columns

555

---

Is php deprecated?

538

---

Is php dying 2018?

550

---

What is self in php?

558

---

What is isset php?

525

---

What are php filters?

522

---

Suppose we receive a form submitted by a post to subscribe to a newsletter. This form has only one field, an input text field named email. How would we validate whether the field is empty? Print a message "the email cannot be empty" in this case?

687

---

What is design pattern? Explain all including singleton pattern?

543

---