Question

$string = "WORD is the first HEJOU is the Second BOOM is the Third";
$sring = str_replce('???', '???<br>', $string);
echo $string; // <br>WORD is the first <br>HEJOU is the Second <br>BOOM is the Third

这个例子说明了一切。我想选择所有带大写字母的单词（不是以大写字母开头的单词），而是用前面的内容替换。有什么想法吗？

Answer 1

$string = "WORD is the first HEJOU is the Second BOOM is the Third";
$string = preg_replace("#\b([A-Z]+)\b#", "<br>\\1", $string);
echo $string;

<强> OUTOUT
<br>WORD is the first <br>HEJOU is the Second <br>BOOM is the Third

正在使用的正则表达式是：

\b - Match a word boundary, zero width
[A-Z]+ - Match any combination of capital letters 
\b - Match another word boundary
([A-Z]+) - Capture the word for use in the replacement

然后，在替换中

\\1, replace with the captured group.

Answer 2

str_replace只需将特定字符串替换为其他特定字符串即可。您可以使用preg_replace

print preg_replace('~\b[A-Z]+\b~','<br>\\0',$string);

Answer 3

使用正则表达式

http://php.net/manual/en/function.preg-replace.php

如何从字符串中用大写字母查找（和替换）单词？

3 个答案: