How can functions like stripos and stristr be utilized in PHP for efficient password validation?

When validating passwords in PHP, functions like stripos and stristr can be used to efficiently check if a password contains certain forbidden characters or substrings. These functions can help simplify the validation process by allowing you to easily search for specific patterns within the password string. 

$password = "Password123";

// Check if the password contains the word "password" in any case
if (stripos($password, "password") !== false) {
    echo "Password should not contain the word 'password'.";
} else {
    echo "Password is valid.";
}

Keywords

PHP stripos stristr password validation efficient

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