Some regex I use when searching csv, text, html, php files in Sublime Text

sublime-regex-searches

# Find non alpha numberic characters, excluding _.,-
[^a-zA-Z\d\s_.,-]

# Find single tag only
html - <html\b[^>]*>
div - <div\b[^>]*>
span - <span\b[^>]*>
font - <font\b[^>]*>
xml namespace - <\?xml\b[^>]*>
xml namespace - <!--\?xml\b[^>]*>

# Find tag and everything inside it
style - <style\b[^>]*>(.*?)</style>
xml - <xml\b[^>]*>(.*?)</xml>

# Find specific attributes
class= -  class=\b[^>]*
class= -  class=""\b[^>]*
style= -  style=\b[^>]*
style= -  style=""\b[^>]*

# Find uppercase characters, use CMD + K + L to make lowercase
uppercase - <([A-Z][A-Z0-9]*)\b[^>]*>

# Find comments
<!--  /\* Font(.*)-->
<![endif]-->
<!--[if gte mso 9]>
<!--[if gte mso 10]>

# Find empty lines
\n\n