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There are many ways to encode images into base64 format using several built-in functions in PHP.

These functions include:

• pathinfo
• file_get_contents
• base64_encode
• mime_content_type

Encode images to Base64 in PHP using file_get_contents, pathinfoandbase64_encode

The image should have a defined path stored in a variable to encode the image as base64 using file_get_contents, , pathinfoand .base64_encode

Use pathinfothe function to read the information. Then pass the resulting information to file_get_contentsthe function.

file_get_contentsThe job of is to read the image file into a string. We can pass the string to base64_encodethe function.

To display a base64-encoded image, concatenate the string data:image/, pathinfothe information from , the string ;base64, and the base64-encoded string.

<?php
	// Define a path for the image
	$image_path = 'xps-unsplash.jpg';

	// Check the image type
	$image_type = pathinfo($image_path, PATHINFO_EXTENSION);

	// Read the image into a string
	$data = file_get_contents($image_path);

	// Encode the image
	$base64_encode = 'data:image:/' . $image_type . ';base64,' . base64_encode($data);

	// Return the first 50 characters of the
	// base64 encoded string
	echo substr($base64_encode, 0, 50);
?>

Output:

data:image:/jpg;base64,/9j/4AAQSkZJRgABAQEASABIAAD

Encode images as Base64 in PHP using file_get_contentsandbase64_encode

To convert an image to base64, pass the path to the image directly to file_get_contentsthe function.

file_get_contentsbase64_encodeThe function will return a string. It will help if you provide this string as a parameter to the function.

<?php
    // Define a path for the image
    $data = file_get_contents('xps-unsplash.jpg');

    // Encode the image
    $base64_encode = base64_encode($data);

    // Return the first 50 characters of the
    // base64 encoded string
    echo substr($base64_encode, 0, 50);
?>

Output:

/9j/4AAQSkZJRgABAQEASABIAAD/4gIcSUNDX1BST0ZJTEUAAQ

Encode images as Base64 in PHP using base64_encodeandmime_content_type

Use file_get_contentsthe function to read the image path. Then convert the resulting string into base64 encoding.

You can format the image source before passing it to the < <img>img src="https://github.com/openwrt/images/blob/master ...src

To do this you need to format your image as data:{mime};base64,{data}. You can infer from the format what image mime type you need.

You can mime_content_typeget the image mime type using the getImage function. Finally, you pass the format as the value of the attribute <img>of the getImage tag src.

<?php
    // Define a path for the image
    $image_path = 'xps-unsplash.jpg';

    // Read the image path and convert it to
    // base64
    $base64_encode = base64_encode(file_get_contents($image_path));

    // Prepare the image for use in an img
    // src tag
    $image_source = 'data: ' . mime_content_type($image_path) . ';base64,' . $base64_encode;

    // Display the image in the img src tag
    echo '<img src="' . $image_source . '">';
?>

Output:

Encode image to Base64 using custom function in PHP

In the definition of this function, you can use methods such as file_get_contents, base64_encode, pathinfoand to handle image encoding.

You can use file_put_contentsto implement caching functionality for better performance.

<?php
    function encode_html_image (
        $image_file,
        $alternate_text = NULL,
        $image_cache,
        $image_extension = NULL
    ) {
        // check if the image is not a file
        if (!is_file($image_file)) {
            return false;
        }
        // Save the image as base64 extension for
        // use as a cache
        $image_with_base64_extension = "{$image_file}.base64";
        if ($image_cache && is_file($image_with_base64_extension)) {
            // Use the cache image
            $base64_encoded_image = file_get_contents($image_with_base64_extension);
        } else {
            // Create a new base64 encoded image
            $image_binary_data = file_get_contents($image_file);
            $base64_encoded_image = base64_encode($image_binary_data);

            if ($image_cache) {
                file_put_contents($image_with_base64_extension, $base64_encoded_image);
            }
        }

        $image_extension = pathinfo($image_file, PATHINFO_EXTENSION);

        return "<img alt='{$alternate_text}' src='data:image/{$image_extension};base64,{$base64_encoded_image}' />";
    }

    $sample_image = 'xps-unsplash.jpg';
    $encoded_image = encode_html_image($sample_image, 'XPS by DELL', true);
    echo $encoded_image;
?>

Output: