php - 像 Google 一样匹配项目搜索 - PHP 代码

Question

我想写一个像这个函数（str，find）{}这样的函数，这样当我有一个像这样的str

大家好，大家好，大家好，大家好

并找到像“你好”这样的词，我得到了结果

<span class="match">Hello</span> every body, <span class="match">HeLlo</span> and <span class="match">hElLo</span> everyone blah

Answer 1

echo preg_replace('~Hello~i', '<span blabla>\0</span>', 'Hello every body, HeLlo and hElLo everyone blah');

给

<span blabla>Hello</span> every body, <span blabla>HeLlo</span> and <span blabla>hElLo</span> everyone blah