How can PHP functions be used to extract specific values from a text string?

To extract specific values from a text string in PHP, you can use functions like `preg_match()` or `strpos()` along with regular expressions. These functions allow you to search for specific patterns or substrings within a text string and extract the desired values. By using these functions, you can easily parse and extract information from a text string based on your requirements.

$text = "Hello, my email is example@email.com";
$pattern = '/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/';
preg_match($pattern, $text, $matches);
$email = $matches[0];
echo $email; // Output: example@email.com