How can external images in HTML emails sent via PHP be handled to avoid display issues?

When sending HTML emails via PHP, external images may not display correctly due to email clients blocking external content for security reasons. To avoid display issues, you can embed the images directly into the email using base64 encoding. 

// Function to encode an image file to base64
function base64EncodeImage($image_file) {
    $image_data = file_get_contents($image_file);
    $base64_image = base64_encode($image_data);
    $image_type = pathinfo($image_file, PATHINFO_EXTENSION);
    return "data:image/{$image_type};base64,{$base64_image}";
}

// Usage example
$image_path = 'path/to/image.jpg';
$base64_image = base64EncodeImage($image_path);

// Embed the image in the HTML email
$html_content = '<img src="' . $base64_image . '" alt="Embedded Image">';

Keywords

PHP HTML emails external images handling display issues

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