Php and editplus Regular Expressions remove blank lines

This article mainly introduces php and editplus regular expressions to remove blank rows. This article describes the writing of Regular Expressions directly. For more information, see

This article mainly introduces php and editplus regular expressions to remove blank rows. This article describes the writing of Regular Expressions directly. For more information, see

Remove empty lines inside the string:

The Code is as follows:

$ Str = preg_replace ("/(\ s *? \ R? \ N \ s *?) +/"," \ N ", $ str );

Remove all empty rows, including internal and header and tail:

The Code is as follows:

$ Str = preg_replace ('/($ \ s * $) | (^ \ s * ^)/m', '', $ str );

Replace the Regular Expression of blank rows in editplus:

Regular Expression: ^ [\ t \ n] * \ n