是否可以在php中使用正则表达式替换词组之前的单词？

Question

输入文字：Engineering School, Medical school

要求的输出：Educational school, Educational school

规则：school短语（不区分大小写）之前的任何单词都需要替换为Educational

$inputext = "Engineering School, Medical school"; 
$rule ="//s/";
$replacetext = "Educational";
$outputext = preg_replace($rule, $replacetext, $inputext);
echo($outputext);

谢谢您的建议。

Answer 1

在正则表达式中使用/\w+(?= school)/i模式来选择school之前的任何单词。

$inputext = "Engineering school, Medical school"; 
$rule ="/\w+(?= school)/i";
$replacetext = "Educational";
$outputext = preg_replace($rule, $replacetext, $inputext);

在demo中查看结果

另外，您可以使用/\w+(?= school(,|$))/i来防止匹配schoolboy之类的不想要的单词，如@WiktorStribiżew所说。