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PHP用正则表达式匹配新行中的所有字符

preg-replace-callback preg-match-all regex php

Omotayo · 技术社区 · 7 年前

我想匹配之后的任何字符 [nextpage]

$string="[nextpage] This is how i decided to make a living with my laptop.
This doesn't prevent me from doing some chores,

I get many people who visits me on a daily basis.

[nextpage] This is the second method which i think should be considered before taking any steps.

That way does not stop your from excelling. I rest my case.";

$pattern="/\[nextpage\]([^\r\n]*)(\n|\r\n?|$)/is";
preg_match_all($pattern,$string,$matches);
$totalpages=count($matches[0]);
$string = preg_replace_callback("$pattern", function ($submatch) use($totalpages) { 
$textonthispage=$submatch[1];
return "<li> $textonthispage";
}, $string);
echo $string;

这只返回第一行中的文本。

<li> This is how i decided to make a living with my laptop.

<li> This is the second method which i think should be considered before taking any steps.

预期结果;

<li> This is how i decided to make a living with my laptop.
This doesn't prevent me from doing some chores,

I get many people who visits me on a daily basis.

<li> This is the second method which i think should be considered before taking any steps.

That way does not stop your from excelling. I rest my case.

2 回复 | 直到 7 年前

anubhava 7 年前

\[nextpage]\h*(?s)(.+?)(?=\[nextpage]|\z)

替换为:

<li>$1

RegEx Demo

PHP代码:

$re = '/\[nextpage]\h*(?s)(.+?)(?=\[nextpage]|\z)/';
$result = preg_replace($re, '<li>$1', $str);

Code Demo

正则表达式分解:

\[nextpage]         # match literal text "[nextpage]"
\h*                 # match 0+ horizontal whitespaces
(?s)(.+?)           # match 1+ any characters including newlines
(?=\[nextpage]|\z)  # lookahead to assert that we have another "[nextpage]" or end of text

Martijn 7 年前

如果你有一个固定的字符串,你不应该正则表达式。正则表达式很昂贵,简单的str_替换也能实现这一目的:

$result = str_replace("[nextpage]", "<li>", $str);

如果您想将其作为适当的HTML,还需要一个关闭标记:

$result = str_replace("[nextpage]", "</li><li>", $string);
$result = substr($result, 5, strlen($result)).'</li>'; // remove the start </li>

echo $result;

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