PHP and editplus regular expression to remove blank lines, editplus regular expression_PHP tutorial

php and editplus regular expressions remove blank lines, editplus regular expressions

remove blank lines inside the string:
Copy code The code is as follows:
$str = preg_replace("/(s*?r?ns*?) /","n",$str);

Remove all blank lines, including internal and trailing lines:
Copy code The code is as follows:
$str = preg_replace('/($s*$)|(^s*^)/m', '',$str);

Regular expression to replace blank lines in editplus:

Regular expression: ^[tn]*n

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