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48 lines
1.1 KiB
PHP
48 lines
1.1 KiB
PHP
<?php
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// Whenever you create an object in PHP, you put parentheses after the class name.
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// In the previous examples, we always left the parentheses empty.
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class Hat {
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public $color;
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public function setColor($color)
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{
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$this->color = $color;
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}
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}
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$hat = new Hat();
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// However, you can actually pass data into the parentheses like a function.
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// The data will be passed to a special function on the class called a constructor.
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class Ballcap
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{
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public $color;
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public function __construct($color)
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{
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$this->color = $color;
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}
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}
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// A constructor is not required, but can make creating a new object easier.
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// They are usually used to define the initial value of a property.
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// Instead of writing:
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$hat = new Hat();
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$hat->setColor('Red');
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// You can write:
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$ballcap = new Ballcap('Blue');
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// Constructors do not return values because the return value is a always a new object.
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class Tophat
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{
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public function __construct($color)
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{
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return $color;
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}
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}
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// "$tophat" now holds an instance of Tophat, not the color "Grey".
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$tophat = new Tophat('Grey');
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