What is the purpose of the preg_match function in the provided PHP code?

The purpose of the preg_match function in the provided PHP code is to check if a given string matches a specified regular expression pattern. In this case, the regular expression pattern is checking if the string contains only letters (a-z, A-Z) and spaces. To solve this issue, we can update the regular expression pattern to allow for spaces. This will ensure that the preg_match function returns true if the string contains only letters and spaces. 

$string = "Hello World";
if (preg_match('/^[a-zA-Z\s]+$/', $string)) {
    echo "String contains only letters and spaces.";
} else {
    echo "String contains characters other than letters and spaces.";
}

Keywords

preg_match PHP regular expressions pattern matching string validation

Related Questions