What is the purpose of using slashes in PHP code and when should they be used?

Slashes in PHP code are used to denote the beginning and end of a regular expression pattern. They are used when working with functions that require regular expressions, such as preg_match() or preg_replace(). Slashes are placed at the beginning and end of the pattern to indicate that it is a regular expression. Example: 

$string = "Hello, World!";
if (preg_match("/Hello/", $string)) {
    echo "String contains 'Hello'";
}

Keywords

slashes PHP code escape characters string manipulation security

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