PHP class declaration and PHP class usage examples sharing_PHP tutorial

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/**The PHP language supports object-oriented programming. Anyone who has studied Java and C++ knows about object-oriented programming!
*If you are not sure, just go to Baidu and ask.
*/

//Let’s define a class. The keyword for defining a class is "class".
class computer {

/Define an addition
function add ($n1,$n2) {

$sum = $n1 + $n2;
return $sum;
} //Define one Subtraction
function jf ($n1,$n2) {

$sum = $n1 - $n2;
return $sum;
} //Define a multiplication
function cf ($n1,$n2) {

$sum = $n1 * $n2;
return $sum;
}
}

/**
How to use methods in a class is to create an object of the class and use the object to call the method
The following is the method of calling the class
*/

//$com is the object of the computer class. To create an object, use the new keyword
$com = new computer();

//Call the object in the class For methods, use object name-> method name (parameters, parameters...)
echo $com -> add(1,2);
echo $com -> jf(1,2);
echo $com -> cf(1,2);

//If these methods are called by buttons, you can simply write a calculator,
//Each button Corresponds to a method
?>

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truehttp: //www.bkjia.com/PHPjc/746865.htmlTechArticleCopy the code as follows: ?php /**php language supports object-oriented programming. For object-oriented programming , Anyone who has studied Java and C++ knows it! *If you are not sure, go to Baidu and ask...