To lowercase all lazy-src=""

lower.py

import os
import re

# Function to lowercase everything within the 'lazy-src' attribute in an HTML file
def lowercase_lazy_src(file_path):
    with open(file_path, 'r', encoding='utf-8') as file:
        content = file.read()
        
        # Use regular expression to find all 'lazy-src' attributes and lowercase their values
        modified_content = re.sub(r'lazy-src="([^"]+)"', lambda match: f'lazy-src="{match.group(1).lower()}"', content, flags=re.IGNORECASE)
    
    # Write the modified content back to the file
    with open(file_path, 'w', encoding='utf-8') as file:
        file.write(modified_content)

# Function to loop through all subdirectories and process index.php files
def process_subdirectories(base_dir):
    for root, dirs, files in os.walk(base_dir):
        for file in files:
            if file == 'index.php':
                file_path = os.path.join(root, file)
                lowercase_lazy_src(file_path)
                print(f"Processed: {file_path}")

# Specify the base directory where you want to start the search
base_directory = './'

# Call the function to process subdirectories
process_subdirectories(base_directory)