PHP类中的双花括号-如何使用它们从2个字符串生成随机字符串并返回值?

Question

我偶然发现了一个脚本，该脚本从数组中的两种不同类型的单词生成随机名称。代码如下:

protected static $techTerms = array('AddOn', 'Algorithm', 'Architect', 'Array', 'Asynchronous', 'Avatar', 'Band', 'Base', 'Beta', 'Binary');
protected static $culinaryTerms = array('Appetit', 'Bake', 'Beurre', 'Bistro', 'Blend', 'Boil', 'Bouchees', 'Brew', 'Buffet', 'Caffe', 'Caffeine', 'Cake');
protected static $companyNameFormats = array(
'{{techTerm}}{{culinaryTerm}}',
'{{techTerm}}{{techTerm}}',
'{{culinaryTerm}}{{techTerm}}'
);
public static function techTerm()
{
return static::randomElement(static::$techTerms);
}
public static function culinaryTerm()
{
return static::randomElement(static::$culinaryTerms);
}
public function companyName()
{
$format = static::randomElement(static::$companyNameFormats);
return $this->generator->parse($format);
}

基本上，脚本应该创建并返回$companyNameFormats中定义的单词的随机组合。这个脚本需要FakerFactory，但我想让它独立。在这一点上，有两个问题:

randomElement为未定义方法，generator->parse为Call to a member function parse() on null

我已经设法修改脚本，使其工作，但我感兴趣的是如何使用{{}}在$companyNameFormats中给出并返回结果，而不使用外部库?

修改后的脚本如下:

protected static function companyNameFormats()
{
$techArray = [];
$techArray[] = self::techTerm();
$culinaryArray = [];
$culinaryArray[] = self::culinaryTerm();
$result = array(
array_merge($techArray, $culinaryArray),
array_merge($techArray, $culinaryArray),
array_merge($culinaryArray, $techArray),
array_merge($techArray, $culinaryArray),
array_merge($culinaryArray, $techArray)
);
return $result;
}
public static function techTerm()
{
$techTermKey = array_rand(static::$techTerms, 1);
$techTermValue = static::$techTerms[$techTermKey];
return $techTermValue;
}
public static function culinaryTerm()
{
$culinaryTermsKey = array_rand(static::$culinaryTerms, 1);
$culinaryTermsValue = static::$culinaryTerms[$culinaryTermsKey];
return $culinaryTermsValue;
}
public function companyName()
{
$companyNameKey = array_rand(static::companyNameFormats(), 1);
$companyNameValue = static::companyNameFormats()[$companyNameKey];
return $companyNameValue;
}

Answer 1

他们可能在做类似preg_replace的事情。

简单的例子:

class Foo {
protected static array $foods = ["Pie", "Cake", "Yoghurt"];
protected static array $animals = ["Dog", "Cat", "Giraffe"];
protected static array $formats = [
"{{food}} {{animal}}", 
"{{animal}} {{food}}"
];
public function get():string{
$format = $this->getRandomElement(self::$formats);

$format = preg_replace(
"/{{animal}}/",
$this->getRandomElement(self::$animals),
$format
);

return preg_replace(
"/{{food}}/",
$this->getRandomElement(self::$foods),
$format
);
}
protected function getRandomElement(array $elements):string{
return $elements[random_int(0, count($elements) - 1)];
}
}
echo (new Foo())->get(); // Cat Yoghurt

Answer 2

基于@Kyrre代码，这是最后的工作示例:

protected static $techTerms = array('AddOn', 'Algorithm', 'Architect', 'Array', 'Asynchronous', 'Avatar', 'Band', 'Base', 'Beta', 'Binary');
protected static $culinaryTerms = array('Appetit', 'Bake', 'Beurre', 'Bistro', 'Blend', 'Boil', 'Bouchees', 'Brew', 'Buffet', 'Caffe', 'Caffeine', 'Cake');
protected static $companyNameFormats = array(
'{{techTerm}} {{culinaryTerm}}',
'{{techTerm}} {{techTerm}}',
'{{culinaryTerm}} {{techTerm}}'
);
public static function techTerm()
{
return static::getRandomElement(static::$techTerms);
}
public static function culinaryTerm()
{
return static::getRandomElement(static::$culinaryTerms);
}
protected static function getRandomElement(array $elements): string
{
return $elements[random_int(0, count($elements) - 1)];
}
public function get(): string
{
$format = $this->getRandomElement(self::$companyNameFormats);

$format = preg_replace(
"/{{techTerm}}/",
$this->getRandomElement(self::$techTerms),
$format
);
return preg_replace(
"/{{culinaryTerm}}/",
$this->getRandomElement(self::$culinaryTerms),
$format
);
}