如何使用 PHP 从多个 url 下载图像？

Question

I am new to PHP and also SO. My task is to download images from multiple websites and place them to a folder with the product number as the name of the image .

I have an excel Book1.csv that contains all the product number in column A.

Each url contains the product number. An example of a website that I am trying to download the image. ( https://www.rockwellautomation.com/en-us/products/details.20G1ABC460JN0NNNNN.html )

Here is a snippet of my updated codes:

<?php
$file = fopen("Book1.csv","r");

// Remote image URL
while (($result = fgetcsv($file)) !== false)
{
  $fileName = rawurlencode($result[0]).".html";
  $link = "https://www.rockwellautomation.com/en-us/products/details.".$fileName;
  echo $link."<br>";
  file_put_contents($fileName, file_get_contents($link));
}

?>

Update:

Now it downloads the url with images however I just want to download one image which is the product image on every website and place it in a folder.

Any help is appreciated thank you

Answer 1

If the aim is to download the product image only rather than the HTML as per the updated comment in the question "I just want to download one image which is the product image on every website and place it in a folder" then perhaps using an XPath query to specifically target that image would be the way to proceed?

The following has been tested with the two product codes shown in the screenshot of the CSV. A more explicit XPath pattern might make this slightly faster but hard to quantify currently.

As you mention that the CSV has a single column each row is therefore a distinct product so using file to open the csv file yields an array which then makes processing very simple using a foreach loop.

<?php   
    # directory in which to store images
    $dir=__DIR__ . '/images/tmp';
    
    # The CSV file obvs '-)
    $file='rockwell-products.csv';
    
    # variable to track results
    $output=array();
    
    # size of all files downloaded
    $size=0;
    
    # XPath pattern to find file 
    $pttn='//img[@class="carousel__currentImage"]';
    # product url template
    $baseurl='https://www.rockwellautomation.com/en-us/products/details.%s.html';
    
    # create the DOMDocument instance & ignore errors with remote HTML
    libxml_use_internal_errors( true );
    $dom=new DOMDocument;
    $dom->validateOnParse=false;
    $dom->strictErrorChecking=false;
    $dom->recover=true;
    
    
    # open the csv file - as an array!
    $lines=file( $file );
    $count=0;
    
    # iterate through all lines in CSV file
    foreach( $lines as $code ){
        if( !empty( trim( $code ) ) ){
            
            # use the product code in the template string
            $url=sprintf( $baseurl, trim( $code ) );
            
            # load the HTML into the DOMDocument instance
            $dom->loadHTML( file_get_contents( $url ) );
            
            # Query the dom using XPath;
            $xp=new DOMXPath( $dom );
            $col=$xp->query( $pttn );
            
            if( $col && $col->length > 0 ){
                # get the src attribute from the image
                $src=$col->item(0)->getAttribute('src');
                $filename=sprintf( '%s.%s', trim( $code ), pathinfo( basename( $src ),PATHINFO_EXTENSION ) );
                $bytes=file_put_contents( sprintf( '%s/%s', $dir, $filename ), file_get_contents( $src ) );
                
                if( $bytes > 0 ) {
                    $output[]=sprintf('<div>Found and saved image <a href="%2$s" target="_blank">%1$s</a> - %3$sKb</div>', $filename, $src, round( $bytes/1024,2) );
                    $size+=$bytes;
                    $count++;
                }else{
                    $output[]=sprintf('<div>Found image but unable to save to disk - %s</div>', $filename );
                }
            }else{
                $output[]=sprintf('<div>Failed to find content for: "%1$s" - <a href="%2$s" target="_blank">%2$s</a></div>', $code, $url );
            }
            libxml_clear_errors();
            $xp=null;
        }
    }
    
    $dom=null;
    
    
    
    printf('<div>Finished! Processed %s entries and downloaded %s files - Total: %sMb</div>', count( $lines ), $count, round($size/pow(1024,2),2) );
    foreach($output as $item)echo $item;