How Can I Efficiently Download and Save Images Using cURL in PHP?

Downloading Image Files via CURL PHP

To fetch and save image files from URLs, CURL PHP offers a convenient solution. However, certain coding issues can hinder your attempts. Let's dissect this code snippet:

function GetImageFromUrl($link)
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_POST, 0);
    curl_setopt($ch, CURLOPT_URL, $link);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}

$sourcecode = GetImageFromUrl($iticon);
$savefile = fopen(' /img/uploads/' . $iconfilename, 'w');
fwrite($savefile, $sourcecode);
fclose($savefile);

Issues and Solution:

1. Incorrect File Path:

   • The file-saving statement incorrectly contains spaces (' ') in the path. Replace it with:

     $savefile = fopen('img/uploads/' . $iconfilename, 'w');

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2. Missing Functionality:

   • The code fetches the image but doesn't account for binary data. To ensure proper image saving, add:

     curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);

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3. Overwriting Existing Files:

   • The code overwrites any existing file with the same name. To avoid this, use:

     if (file_exists($savefile)) {
       unlink($savefile);
     }

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Optimized Code:

function grab_image($url, $saveto) {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
    $raw = curl_exec($ch);
    curl_close($ch);
    if (file_exists($saveto)) {
        unlink($saveto);
    }
    $fp = fopen($saveto, 'x');
    fwrite($fp, $raw);
    fclose($fp);
}

Additional Note:

In your PHP configuration file (php.ini), ensure that allow_url_fopen is enabled.

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