Php-mysql Course

To chain a static and a public method through class name, for example:
The instance of the className must be returned in the staticMethod, using "return new self" .
- Code example:
class clsShow {
  public static $url;

  public static function setData(){
    self::$url = '';
    return new self;

  public function show(){
    echo self::$url;

// accessing show() method after setData()
clsShow::setData()->show();             //

• To this page: PHP Method Chaining it is a lesson with more details and examples about chaining multiple methods.

Daily Test with Code Example

What attribute makes an option from <select> selected?
checked="checked" selected="selected" disabled="disabled"
<select name="a_name">
 <option value="val1">Option 1</option>
 <option value="val2" selected="selected">Option 2</option>
What CSS value allows to create color gradients for background?
contain repeat-x linear-gradient
#id {
  background: linear-gradient(top left, #1f1, #fff, #11f);
What statement creates an array in JavaScript?
[] {} new Object()
var arr = [1, "", ""];
Indicate the PHP function used to redirect to other page.
function() header() switch()
Chaining Static and Public Methods in PHP

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