I have string that is an HTML page from my DB. What I want to do is search through the string and get all <img tags that have the height or width set, and change the src on each of them. I am not very good with Regular Expressions so I was hoping someone out there could help me out.
If using regular expressions is not a requirement then the following links could be useful
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Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: