preg_replace中在替换参数怎么引用命名捕获组?
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了preg_replace中在替换参数怎么引用命名捕获组?,小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含1936字,纯文字阅读大概需要3分钟。
内容图文
![preg_replace中在替换参数怎么引用命名捕获组?](/upload/InfoBanner/zyjiaocheng/192/80052035f2ab4080bf6be41dc193f924.jpg)
AAAA ";
$text.="
";
$text.="";
$text.="
";
$text.="
some
";
$out=preg_replace("/<(?Pspan|p)[^>]+>(.+)<\/(\k)>/","[\P=
TAG]\\1[\/\k]",$text);
print_r( $out);
好象直接用k
回复内容:
一般的捕获组可以用 \0 \1 \N 来表名,如果是用 P
AAAA ";
$text.="
";
$text.="";
$text.="
";
$text.="
some
";
$out=preg_replace("/<(?Pspan|p)[^>]+>(.+)<\/(\k)>/","[\P=
TAG]\\1[\/\k]",$text);
print_r( $out);
好象直接用k
http://php.com/manual/en/function.preg-replace.php
replacement may contain references of the form \n or (since PHP
4.0.4) $n, with the latter form being the preferred one. Every such reference will be replaced by the text captured by the n'th
parenthesized pattern. n can be from 0 to 99, and \0 or $0 refers to
the text matched by the whole pattern. Opening parentheses are counted
from left to right (starting from 1) to obtain the number of the
capturing subpattern. To use backslash in replacement, it must be
doubled ("\\" PHP string).When working with a replacement pattern where a backreference is
immediately followed by another number (i.e.: placing a literal number
immediately after a matched pattern), you cannot use the familiar \1
notation for your backreference. \11, for example, would confuse
preg_replace() since it does not know whether you want the \1
backreference followed by a literal 1, or the \11 backreference
followed by nothing. In this case the solution is to use ${1}1. This
creates an isolated $1 backreference, leaving the 1 as a literal.When using the deprecated e modifier, this function escapes some
characters (namely ', ", and NULL) in the strings that replace the
This is done to ensure that no syntax errors arise
backreference usage with either single or double quotes (e.g.
'strlen('$1')+strlen("$2")'). Make sure you are aware of PHP's
string syntax to know exactly how the interpreted string will look.
内容总结
以上是互联网集市为您收集整理的preg_replace中在替换参数怎么引用命名捕获组?全部内容,希望文章能够帮你解决preg_replace中在替换参数怎么引用命名捕获组?所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错,欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 gblab@vip.qq.com 举报,一经查实,本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。