php-regexHow to use regex in PHP to match only letters?

Regex (Regular Expressions) is a powerful tool used to match patterns in strings. In PHP, it can be used to match only letters.

Example code

$string = 'Hello World!';
$pattern = '/[a-zA-Z]/';

if (preg_match($pattern, $string)) {
    echo 'Matched!';
}

Output example

Matched!

Code explanation

• $string: This is the string that we want to match against.
• $pattern: This is the regex pattern that we use to match against the string. In this case, it is /[a-zA-Z]/, which matches any letter from a to z, both lowercase and uppercase.
• preg_match(): This is the function that we use to match the string against the regex pattern. It takes two parameters, the regex pattern and the string.
• echo: This is the function that we use to output the result of the match.

Helpful links

• PHP Regex
• Regular Expressions

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