数组中的字符串替换为变量

Question

如果我使用以下代码，则可以：

$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy   = array("pizza", "beer", "ice cream");
$newphrase = str_replace($healthy, $yummy, $phrase);

// Provides: You should eat pizza, beer, and ice cream every day

但是，如果我要替换的单词列表是一个变量，该怎么办。

$sample1 = "fruits, vegetables, fiber";
$sample2 = "pizza, beer, ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array($sample1);
$yummy   = array($sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

// Provides: You should eat fruits, vegetables, and fiber every day.

如果我使用：

$sample1 = '"fruits", "vegetables", "fiber"';
$sample1 = '"pizza", "beer", "ice cream"';
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array($sample1);
$yummy   = array($sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

我是不是遗漏了什么？

有什么容易做到的方法吗？

Answer 1

您需要将字符串提交给数组，在本例中使用need：

$sample1 = "fruits, vegetables, fiber";
$sample2 = "pizza, beer, ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
    $healthy = explode(',',$sample1);
    $yummy   = explode(',',$sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

Answer 2

您可以使用分隔符将string分解为array：

$sample1 = "fruits, vegetables, fiber";
$sample2 = "pizza, beer, ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = explode(",", $sample1);
$yummy   = explode(",", $sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

不过，我建议您在每个字符串之间不要有空白。如果您要这样做，那么您可能希望trim()每个值。array_map()在这里很有用，因为您可以将一个函数映射到如下所示的每个值：

$healthy = array_map('trim', explode(",", $sample1));

所以整件事会更像是：

$sample1 = "fruits    ,    vegetables,fiber";
$sample2 = "pizza,      beer,ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array_map('trim', explode(",", $sample1));
$yummy   = array_map('trim', explode(",", $sample2));
$newphrase = str_replace($healthy, $yummy, $phrase);