PHP 字符串替换大括号内的排除字符串 - PHP string replace exclude string inside braces

PHP string replace exclude string inside braces

本文关键字：字符串排除替换 PHP | 更新日期: 2023-09-27

$str = "PHP is a server-side {{scripting language}} designed for {{web development}} but also used as a general-purpose programming language";
$search = 'language';
$replace = 'english';
$new_str = str_replace($search, $replace, $str);

在上面的代码中，我们如何排除 {{ ... }} 中的字符串。这样输出应该是

"PHP is a server-side {{scripting language}} designed for {{web development}} but also used as a general-purpose programming english"

使用 preg_replace() 而不是 str_replace() ：

$pattern = sprintf('/{{[^}]+}}(*SKIP)(*F)|%s/', preg_quote($search, '/'));
$new_str = preg_replace($pattern, $replace, $str);

{{[^}]+}}匹配{{...}}块内的内容，(*SKIP)(*F)跳过它，%s(用转义的搜索字符串替换(匹配所需的单词。

演示