file = r'resources\views\test-sessions\fill.blade.php'
with open(file, 'r', encoding='utf-8') as f:
    c = f.read()

import re
old_func = re.search(r'function validateForm\(\) \{.*?return true;\s*\}', c, re.DOTALL)
if old_func:
    print(repr(old_func.group(0)))
else:
    # Cari manual
    idx = c.find('function validateForm()')
    print(repr(c[idx:idx+2000]))