---
title: "How to match a string between two characters if they exist?"  
description: "How to match a string between two characters if they exist?"  
author: "Utpal Vishwas"  
published: 2023-08-29  
updated: 2023-09-04  
canonical: https://www.mindstick.com/forum/159718/how-to-match-a-string-between-two-characters-if-they-exist  
category: "c#"  
tags: ["regex", "string", "regular expression"]  
reading_time: 3 minutes  

---

# How to match a string between two characters if they exist?

How to [match](https://www.mindstick.com/forum/159713/regex-match-attribute-in-an-html-code) a [string](https://www.mindstick.com/articles/1527/string-split-in-c-sharp) between [two characters](https://www.mindstick.com/forum/159717/how-to-match-string-between-two-characters-using-regex) if they exist?

## Replies

### Reply by Aryan Kumar

There are a few ways to match a string between two [characters](https://answers.mindstick.com/qa/42112/who-is-the-originator-of-avengers-characters) if they exist. Here are a few methods:

- **Use the** `strstr()` **function.** The `strstr()` function in PHP searches for a substring within a string. The syntax for the `strstr()` function is as follows:

PHP

```plaintext
strstr(string, substring, start_position)
```

Where:

- `string` is the string that you want to search.
- `substring` is the substring that you want to find.
- `start_position` is the position in the string where you want to start the search.

The `strstr()` function will return the first occurrence of the substring in the string, or `FALSE` if the substring is not found.

For example, the following code will search for the string "world" in the string "hello world":

PHP

```plaintext
$string = "hello world";
$substring = "world";

$result = strstr($string, $substring);

if ($result) {
 echo "The string 'world' was found in the string 'hello world'";
} else {
 echo "The string 'world' was not found in the string 'hello world'";
}
```

This code will output the following:

```plaintext
The string 'world' was found in the string 'hello world'
```

- **Use the** `preg_match()` **function.** The `preg_match()` function in PHP is a regular expression function that can be used to search for a pattern in a string. The syntax for the `preg_match()` function is as follows:

PHP

```plaintext
preg_match(pattern, string, matches)
```

Where:

- `pattern` is the regular expression pattern that you want to match.
- `string` is the string that you want to search.
- `matches` is an array that will contain the results of the match.

The `preg_match()` function will return `TRUE` if the pattern is found in the string, or `FALSE` if the pattern is not found.

For example, the following code will search for the pattern `\bworld\b` in the string "hello world":

PHP

```plaintext
$string = "hello world";
$pattern = '\bworld\b';

$result = preg_match($pattern, $string);

if ($result) {
 echo "The pattern 'world' was found in the string 'hello world'";
} else {
 echo "The pattern 'world' was not found in the string 'hello world'";
}
```

This code will output the following:

```plaintext
The pattern 'world' was found in the string 'hello world'
```

The `\b` metacharacter in the pattern matches a word boundary. So, the pattern `\bworld\b` matches the string "world" only if it is surrounded by word boundaries.

- **Use the** `regex101.com` **website.** The `regex101.com` website is a website that can be used to test regular expressions. You can enter the regular expression pattern in the search bar and the website will show you how the pattern matches the string.


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Original Source: https://www.mindstick.com/forum/159718/how-to-match-a-string-between-two-characters-if-they-exist

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