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<?php
//ÉùÃ÷Ò»¸öfinalÀàMath
class Math
{
const PI = 3.14;
public function __construct() {
return "ÕâÊÇMathÀà";
}
//ÕâÀïдÁËÒ»¸öËãÔ²Ãæ»ýµÄ·½·¨£¬Ê¹ÓÃÁËConst³£Á¿£¬
//×¢ÒâʹÓõķ½·¨£¬ÀàËÆÓÚ¾²Ì¬±äÁ¿¡£
public final function area($r) {
return $r * $r * self::PI;
}
public final function max($a, $b) {
return $a > $b ? $a : $b;
}
}
echo Math::PI;
?>
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<?php
//˵Ã÷Ò»¸öfinalÀàMath
class Math
{
const PI = 3.14;
public function __toString() {
return "ÕâÊÇÒ»¸öMathÀà";
}
//ÕâÀïдÁËÒ»¸öËãÔ²Ãæ»ýµÄ·½·¨£¬Ê¹ÓÃÁËConst³£Á¿£¬
//×¢ÒâʹÓõķ½·¨£¬ÀàËÆÓ뾲̬±äÁ¿¡£
public final function area($r) {
return $r * $r * self::PI;
}
public final function max($a, $b) {
return $a > $b ? $a : $b;
}
public function setPI($a) {
self::PI = 3.1415;
}
}
echo Math::PI;
?>
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