PHP多维数组搜索（按特定值查找键）

Question

我有这个多维数组。我需要搜索它并只返回与“slug”的值匹配的键。我知道还有其他关于搜索多维数组的主题，但我的理解还不足以适用于我的情况。非常感谢您的帮助！

所以我需要一个像这样的功能：

 myfunction($products,'breville-one-touch-tea-maker-BTM800XL');
// returns 1

这是数组：

 $products = array (
1  => array(
        'name'          => 'The Breville One-Touch Tea Maker',
        'slug'          => 'breville-one-touch-tea-maker-BTM800XL',
        'shortname'     => 'The One-Touch Tea Maker',
        'listprice'     => '299.99',
        'price'         => '249.99',
        'rating'        => '9.5',
        'reviews'       => '81',
        'buyurl'        => 'http://www.amazon.com/The-Breville-One-Touch-Tea-Maker/dp/B003LNOPSG',
        'videoref1'     => 'xNb-FOTJY1c',
        'videoref2'     => 'WAyk-O2B6F8',
        'image'         => '812BpgHhjBML.jpg',
        'related1'      => '2',
        'related2'      => '3',
        'related3'      => '4',
        'bestbuy'       => '1',
        'quote'         => '',
        'quoteautor'    => 'K. Martino',
        ),

2  => array(
        'name'          => 'Breville Variable-Temperature Kettle BKE820XL',
        'slug'          => 'breville-variable-temperature-kettle-BKE820XL',
        'shortname'     => 'Variable Temperature Kettle',
        'listprice'     => '199.99',
        'price'         => '129.99',
        'rating'        => '9',
        'reviews'       => '78',
        'buyurl'        => 'http://www.amazon.com/Breville-BKE820XL-Variable-Temperature-1-8-Liter-Kettle/dp/B001DYERBK',
        'videoref1'     => 'oyZWBD83xeE',
        'image'         => '41y2B8jSKmwL.jpg',
        'related1'      => '3',
        'related2'      => '4',
        'related3'      => '5',
        'bestbuy'       => '1',
        'quote'         => '',
        'quoteautor'    => '',
        ),
);

原文由 Ben Kouba 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

很简单：

 function myfunction($products, $field, $value)
{
   foreach($products as $key => $product)
   {
      if ( $product[$field] === $value )
         return $key;
   }
   return false;
}

原文由 Aurelio De Rosa 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

适用于关联数组：

 public function getKeyByParamValue(string $param, mixed $value, array $array): mixed
{
    $keys = $this->getKeysByParamValue($param, $value, $array);

    return empty($keys) ? null : $keys[0];
}

public function getKeysByParamValue(string $param, mixed $value, array $array): ?array
{
    return array_keys(
        array_combine(
            array_keys($array),
            array_column($array, $param)
        ),
        $value
    );
}

原文由 Gigoland 发布，翻译遵循 CC BY-SA 4.0 许可协议