PHP StringRegular replacementFunctionpreg_replace instructions, friends in need can refer to it.
1. preg_replace()
$msg = preg_replace("/<style>.+<\/style>/is", "", $msg); -----删除<style></style>和中间的部分 $msg = preg_replace("/<[^>]+>/", "", $msg); -----是删除<>和中间的内容
i (PCRE_CASELESS)
If this modifier is set, the characters in the pattern will match both upper and lower case letter.
s (PCRE_DOTALL)
If this modifier is set, the dot metacharacter (.) in the pattern matches all characters, including newlines. Without this setting, newline characters are not included. This is equivalent to Perl's /s modifier. Exclude Character classessuch as [^a] always match newlines, regardless of whether this modifier is set.
2. ereg() and eregi()
Note: The preg_match() function is usually a faster alternative than ereg()
eregi("
bool ereg ( string pattern, string string [, array regs] ) int eregi ( string pattern, string string, array [regs] )
eregi() is similar to ereg() and has the same usage. The difference is that ereg() is case-sensitive, while eregi() is case-independent.
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