php-regexHow to use PHP regex to match a JSON key value?

Using PHP regex to match a JSON key value is a powerful way to parse and extract data from a JSON string. The following example code block shows how to use regex to match a JSON key value:

$json = '{"name":"John","age":30,"city":"New York"}';

preg_match('/\"name\":\"(.*?)\"/', $json, $name);
echo $name[1];

The output of the example code is:

John

Code explanation

1. $json = '{"name":"John","age":30,"city":"New York"}'; - This is the JSON string that we are trying to parse.

2. preg_match('/\"name\":\"(.*?)\"/', $json, $name); - This is the regex expression used to match the JSON key value. The \"name\":\" part of the expression matches the key, and the (.*?) part of the expression matches the value.

3. echo $name[1]; - This line of code prints out the value of the matched key.

Helpful links

• PHP Regular Expressions
• PHP preg_match() Function

Edit this code on GitHub