I would like to ask the next sentence the role of this statement. Explain it to me. "," E "," I "," s ", what the symbols mean, and what they do. Is there any other mode besides "/eis"?
If there are related to the study material can give me? Thanks, everybody's help! Thank you.
$post =preg_replace ("/\[html\]" (. +?) \[\/html\]/eis "," Htmlcode (' \\1 ') ", $post);
Modifiers:
Modifiers inside regular expressions can change many of the regular features, making regular expressions more appropriate for your needs (note: Modifiers are sensitive to capitalization, which means "E" is not equal to "E"). The modifiers in the regular expression are as follows:
I: If you add "I" to the modifier, it will remove the case sensitivity, that is, "a" and "a" are the same.
M: The default regular start "^" and end "$" just for regular strings if you add "M" to the modifier, the start and end will refer to each line of the string: "^" at the beginning of each line, and "$" at the end.
S: If you add "s" to the modifier, the default "." Any character that represents anything other than a line break will become any character, including a newline character!
X: If you add the modifier, the white space character in the expression will be ignored unless it has been escaped.
E: This modifier is only useful for replacement, and represents the PHP code in replacement.
A: If you use this modifier, the expression must be the beginning of the matching string. For example, "/a/a" matches "ABCD".
E: In contrast to "M", if this modifier is used, then "$" matches the end of the absolute string, rather than the newline character, which is turned on by default.
U: Similar to the question mark, used to set "greedy mode."
? Forms are not greedy matches, that is, as few matches as possible
And
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
The middle of the content
E means that a function can be used to handle the child-matching part of the backward primer
I table is not case insensitive,
S says. Also matches line breaks
Suppose you have the following string
This is a text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
This is another text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
Use/\[html\] (. +?) The results of \[\/html\]/and using [Html\] (. +) \[\/html\]/u are the same,
is not greedy, but one with the modifier, one with the grammar.
The result is
This is a text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
And
This is another text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
Two matches,
And the result of/\[html\] (. +) \[\/html\]/is
This is a text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
This is another text
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
A match
Because the entire character is also consistent with the "
"Start with"
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
"At the end, just to get more strings
