Question

I have following syntax in my script to get email address from string. The email address contains – . 1234567890 _ characters. The email address is retrieved but not _ character before @ sign.

preg_replace("/<([a-z][a-z0-9]*)[^>]*?(\/?)>/i",'<$1$2>', $value);

For example: The email address in string is [e-mail] , with above syntax it returns [e-mail]

Answer 1

You’d need to add in the _ character to your regex, so it would become

preg_replace("/<([a-z][_a-z0-9]*)[^>]*?(\/?)>/i",'<$1$2>', $value);

Alternately, you can do

preg_replace("/<([a-z][\w]*)[^>]*?(\/?)>/i",'<$1$2>', $value);

Using the “word character” \w as shorthand