Re: PHP regular expression summary
$str ='[a-z]';
$str = preg_replace ('/\G[a-z]\E/', '', $str);
echo $str; / / / / Print empty, the copy content is probably copied to the clipboard code: The result is named so that in the matching result, the name can be used to get the value
$str ='abc123abc';
preg_match (' / (? P).