|
|
1.值傳遞
復(fù)制代碼 代碼如下:
<?php
function exam($var1){
$var1++；
echo "In Exam:" . $var1 . "<br />";
}
$var1 = 1;
echo $var1 . "<br />";
exam($var1);
echo $var1 . "<br />";
?>
-------------------------------------------------------------------------------
輸出結(jié)果：
1
In Exam: 2
1
-------------------------------------------------------------------------------
2.引用傳遞
復(fù)制代碼 代碼如下:
<?php
function exam( &$var1){
$var1++；
echo "In Exam:" . $var1 . "<br />";
}
$var1 = 1;
echo $var1 . "<br />";
exam($var1);
echo $var1 . "<br />";
?>
-------------------------------------------------------------------------------
輸出結(jié)果：
1
In Exam: 2
2
-------------------------------------------------------------------------------
3.可選參數(shù)
復(fù)制代碼 代碼如下:
function values($price, $tax=""){
$price += $prive * $tax;
echo "Total Price:" . $price . "<br />";
}
values(100, 0.25);
values(100);
輸出結(jié)果：
Total Price: 125
Total Price: 100
-------------------------------------------------------------------------------
4.如果傳入的是一個(gè)對(duì)象，可以更改該對(duì)象的值
（實(shí)際上變量$obj記錄的是這個(gè)對(duì)象的句柄，將$obj作為參數(shù)傳入，完全可以對(duì)原對(duì)象進(jìn)行操作。）
復(fù)制代碼 代碼如下:
<?php
class Obj{
public $name;
public $age;
public $gander;
public function __construct($name, $age, $gander){
$this->name = $name;
$this->age = $age;
$this->gander = $gander;
}
public function show_info(){
echo $this->name . " " . $this->age . " " . $this->gander . "<br />";
}
}
function grow($obj){
$obj->age++;
}
function test(){
$obj = new Obj("Mr. zhan", "12", "male");
$obj->show_info();
grow($obj);
$obj->show_info();
grow($obj);
$obj->show_info();
}
test();
?>
-------------------------------------------------------------------------------
輸出結(jié)果：
Mr. zhan 12 male
Mr. zhan 13 male
Mr. zhan 14 male
php技術(shù)：php函數(shù)間的參數(shù)傳遞(值傳遞/引用傳遞)，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
