How to match string between two characters using regex.

Revati S Misra 756 29 Aug 2023

1 Answers

Aryan Kumar 04 Sep 2023

Sure, I can help you with that.

To match a string between two characters using regex, you can use the \b metacharacter. The \b metacharacter matches a word boundary. So, if you want to match the string "world" between the characters "w" and "d", you would use the following regex pattern:

\bwor\bd

The \w metacharacter matches any word character, which includes letters, numbers, and the underscore character.

Here is an example of how to use this regex pattern in PHP:

PHP

$string = "hello world";
$pattern = "\bwor\bd";

$result = preg_match($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:

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

You can also use the preg_match_all() function to get all of the matches of the pattern in the string. The syntax for the preg_match_all() function is as follows:

PHP

preg_match_all(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_all() function will return an array of all of the matches of the pattern in the string.

Here is an example of how to use this function:

PHP

$string = "hello world";
$pattern = "\bwor\bd";

$results = preg_match_all($pattern, $string);

foreach ($results as $match) {
 echo $match[0];
}

This code will output the following:

world

The match[0] element of the results array contains the text that was matched by the pattern.

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