What are the latest security features for PHP functions?
PHP functions provide a wide range of security features, including functions for secure password hashing, secure random number generation, cross-site request forgery (CSRF) protection, SQL injection protection, and cross-site scripting (XSS) protection. For example, the password_hash() and password_verify() functions can be used to securely hash and verify passwords, and the mysqli_real_escape_string() function can be used to prevent SQL injection attacks.
Latest Security Features for PHP Functions
PHP provides a wide range of functions that help developers improve the security of their applications safety. Here are some of the latest security features included in PHP functions:
Password Hashing
PHP provides a series of functions for secure hashing and verification of passwords. These include:
-
password_hash()
: Generates a cryptographic password hash using a one-way hashing algorithm such as bcrypt. -
password_verify()
: Compares the clear text password to the stored cryptographic hash to verify the user's identity.
Secure random number generation
PHP provides the following functions to generate secure random numbers:
-
random_bytes()
: Generate a secure, pseudo-random byte sequence. -
random_int()
: Generate a safe random integer within the specified range.
Cross-site request forgery (CSRF) protection
PHP provides the following functions to mitigate CSRF attacks:
-
csrf_token()
: Generate anti-counterfeiting token. -
csrf_verify()
: Verify anti-counterfeiting token.
SQL injection protection
PHP provides the following functions to prevent SQL injection attacks:
-
mysqli_real_escape_string()
: Escape the string to be included in the SQL query. -
PDO::quote()
: Same as above.
XSS Protection
PHP provides the following functions to prevent cross-site scripting (XSS) attacks:
-
htmlspecialchars()
: Escape special characters into HTML entities. -
strip_tags()
: Removes HTML and PHP tags from a string.
Practical Case: Secure Password Hashing
Let’s see how to use password_hash()
and through an example password_verify()
Function securely hashes and verifies passwords.
<?php // 生成一个安全密码哈希 $password = 'my-secret-password'; $hash = password_hash($password, PASSWORD_BCRYPT); // 验证密码 if (password_verify($password, $hash)) { echo "密码验证通过"; } else { echo "密码不匹配"; } ?>
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