php如何在找到字符串中的内容后添加句子？

假设我有这根绳子

$string = "While it has long been disputed, 
it's estimated that Julius Caesar was born in 
Rome on July 12 or 13, 100 BC. 
He hailed from Roman aristocrats[his family was far from rich]. 
When Caesar was 16 his father, Gaius Caesar, died. 
He remained close to his mother, Aurelia."

---

我想在

$string

中搜索

[他的家庭远不富裕]

，并在

[他的家庭远不富裕]

之后插入www.wiki.com中的新行

，如果内容是静态的，并且您希望替换每次使用

也许你想要这样的东西


$string=“尽管这一问题长期以来一直存在争议，
据估计，朱利叶斯·凯撒出生于年
公元前100年7月12日或13日的罗马。
他出身于罗马贵族[他的家族远非富有]。
凯撒16岁时，他的父亲盖乌斯·凯撒去世。
他和母亲奥雷莉亚保持着亲密的关系。”

$tofind=“[他的家庭远非富有]”

$newstring=str\u replace（$tofind，$tofind.“from www.wiki.com”，$string）

echo$newstring

这不是没有新行的我的答案吗？好的，你可以像这样在“from www.wiki.com”中添加标签：$newstring=str\u replace（$tofind，$tofind.
from www.wiki.com，$string）；
$search = '[his family was far from rich]';
echo str_replace($search, "\n" . $search . 'from www.wiki.com', $string);


$string = "While it has long been disputed, 
it's estimated that Julius Caesar was born in 
Rome on July 12 or 13, 100 BC. 
He hailed from Roman aristocrats[his family was far from rich]. 
When Caesar was 16 his father, Gaius Caesar, died. 
He remained close to his mother, Aurelia.";


$tofind="[his family was far from rich]";


$newstring= str_replace($tofind,$tofind." from www.wiki.com",$string);


echo $newstring;