使用数组输出 PHP 中的变量(按顺序)

这段代码输出的内容类似于下面的描述，我需要将每个输出精确地转换为一个PHPvar

eg:

[product-link]个

[0] »» $var_prod_link_0 = 'the link 0 here'; 
[1] »» $var_prod_link_1 = 'the link 1 here'; 
etc..

[product-img-src]个

[0] »» $var_prod_img_0 = 'the image 0 link here'; 
[1] »» $var_prod_img_1 = 'the image 1 link here';
etc..

[h3-title-text]个

[0] »» $var_title_text_0 = 'the title 0 here'; 
[1] »» $var_title_text_1 = 'the title 1 here';
etc.. 

[price]个

[0] »» $var_price_0 = 'the price 0 here';
[1] »» $var_price_1 = 'the price 1 here'; 
ect.. 

This is the code:

# set the libxml parameters and create new DOMDocument/XPath objects.
libxml_use_internal_errors( true );
$dom=new DOMDocument;
$dom->validateOnParse=false;
$dom->strictErrorChecking=false;
$dom->recover=true;
$dom->loadHTML( $html );
libxml_clear_errors();

$xp=new DOMXPath( $dom );

# some basic XPath expressions
$exprs=(object)array(
    'product-link'      =>  '//a[@class="product-image-link"]',
    'product-img-src'   =>  '//a[@class="product-image-link"]/img',
    'h3-title-text'     =>  '//h3[@class="wd-entities-title"]',
    'price'             =>  '//span[@class="price"]/span/bdi'
);
# find the keys (for convenience) to be used below
$keys=array_keys( get_object_vars( $exprs ) );

# store results here
$res=array();

# loop through all patterns and issue XPath query.
foreach( $exprs as $key => $expr ){
    # add key to output and set as an array.
    $res[ $key ]=[];
    $col=$xp->query( $expr );
    
    # find the data if the query succeeds
    if( $col && $col->length > 0 ){
        foreach( $col as $node ){
            switch( $key ){
                case $keys[0]:$res[$key][]=$node->getAttribute('href');break;
                case $keys[1]:$res[$key][]=$node->getAttribute('src');break;
                case $keys[2]:$res[$key][]=trim($node->textContent);break;
                case $keys[3]:$res[$key][]=trim($node->textContent);break;
            }
        }
    }
}
printf('<pre>%s</pre>',print_r($res,true));

The output from the above code:

Array
(
    [product-link] => Array
        (
            [0] => https://...linkhere
            [1] => https://wwwle.com/banana
        )

    [product-img-src] => Array
        (
            [0] => https://image-goes-here.jpg
            [1] => https://www.example.com/kittykat.jpg
        )

    [h3-title-text] => Array
        (
            [0] => The title goes here
            [1] => Oh look, another title!
        )

    [price] => Array
        (
            [0] => â¬20,00
            [1] => â¬540,00
        )

)