我遇到了一個問題：致命錯誤： 調(diào)用未定義的方法 ShopProductWriter：：getProducer（） 在 C：\OSPanel\域\zandstra.com\索引.php第 37 行是什么原因造成的？<?phpclass ShopProduct { public $title; public $producerSurName; public $producerFirstName; public $price = 0; public function __construct ( $title, $firstName, $surName, $price ) { $this->title = $title; $this->producerFirstName = $firstName; $this->producerSurName = $surName; $this->price = $price; } public function getProducer () { return $this->producerFirstName . " " . $this->producerSurName; }}$product1 = new ShopProduct ( "My Antonia", "Willa", "Cather", "5.99");class ShopProductWriter { public function write ($shopProduct){ $str=$shopProduct->title . ":" . $shopProduct->getProducer() . " (".$shopProduct->price.")\n"; print $str; }}$product1 = new ShopProductWriter("My Antonia", "Willa", "Cather", 5.99);$writer = new ShopProductWriter();$writer->write($product1);
1 回答
回首憶惘然
TA貢獻1847條經(jīng)驗 獲得超11個贊
這里
$product1 = new ShopProductWriter("My Antonia", "Willa", "Cather", 5.99);
你重新創(chuàng)建了 ，直到那時是一個.由此，是一個對象。這沒有方法，它只有一種方法。這是你代碼中的一個拼寫錯誤，我認為你已經(jīng)多次重寫了你的代碼，一些舊的初始化離開了，你應(yīng)該已經(jīng)離開了。在這種形式下，可能做你想要的：$product1ShopProduct$product1ShopProductWritergetProducer()write()
<?php
class ShopProduct {
public $title;
public $producerSurName;
public $producerFirstName;
public $price = 0;
public function __construct (
$title,
$firstName,
$surName,
$price
)
{
$this->title = $title;
$this->producerFirstName = $firstName;
$this->producerSurName = $surName;
$this->price = $price;
}
public function getProducer () {
return $this->producerFirstName . " " . $this->producerSurName;
}
}
class ShopProductWriter {
public function write ($shopProduct){
$str=$shopProduct->title . ":" . $shopProduct->getProducer()
. " (".$shopProduct->price.")\n";
print $str;
}
}
$product1 = new ShopProduct("My Antonia", "Willa", "Cather", 5.99);
$writer = new ShopProductWriter();
$writer->write($product1);
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