What are some common pitfalls when using regular expressions to extract image URLs from HTML content in PHP?

One common pitfall when using regular expressions to extract image URLs from HTML content in PHP is not accounting for variations in the HTML structure that can break the regex pattern. To solve this, it's recommended to use a more robust HTML parsing library like DOMDocument to accurately extract image URLs. 

// Initialize DOMDocument
$dom = new DOMDocument();
$dom->loadHTML($html_content);

// Find all image tags
$images = $dom->getElementsByTagName('img');

// Extract image URLs
$image_urls = [];
foreach ($images as $image) {
    $image_urls[] = $image->getAttribute('src');
}

// Print out the extracted image URLs
print_r($image_urls);

Keywords

PHP regular expressions image URLs HTML content extraction

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