使用正则表达式替换句子中的字符串

Question

I want to make a script that finds strings with this format {Hello|Hi|Hey} from different sentences using {([\\w|]+)} and then uses (?<=[{|])\\w+(?=[|}]) to get the individual words and randomly selects one of the words and replaces the starting with it.

Do I have to use a loop to find each formatted string and then put the individual words in an array and count values in the array and use rand function to get random value and replace the string with it? Which functions do I have to use?

Answer 1

You dont need twice preg_match;

this is maybe what you are asking:

<?php

$a = '{Hello|Hi|Hey}';

preg_match ( '{([\w|]+)}',$a,$array );

$items = explode("|",  $array[0]);
echo $items[rand(0, count($items) - 1)]  ;