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Analyze the PHP functions in WordPress that control user login and determine user login, wordpress user login_PHP tutorial
Analyze the PHP functions in WordPress that control user login and determine user login, wordpress user login_PHP tutorial
Jul 12, 2016 am 08:58 AM
Analysis of the PHP functions in WordPress that control user login and determine user login, WordPress user login
Login function: wp_signon()
Function introduction:
The wp_signon() function is used to authorize users to log in to WordPress and remember the user name. This function replaces wp_login. Enabled from WordPress version 2.5.
Function usage:
<?php wp_signon( $credentials, $secure_cookie ) ?>
Parameter description:
- $credentials
- (array) (optional) Login user information.
- Default: None
- $secure_cookie
- (boolean) (optional) Determines whether to use secure cookies.
- Default: None
Note: If you do not provide $credentials, wp_signon uses the $_POST parameter (the key values ??are "log", "pwd" and "rememberme").
Function return value:
(object)
The object WP_Error is returned if the login fails, and WP_User
Function example:
$creds = array(); $creds['user_login'] = 'example'; //wordperss后臺用戶名稱 $creds['user_password'] = '123456'; //wordperss后臺用戶密碼 $creds['remember'] = true; $user = wp_signon( $creds, false ); if ( is_wp_error($user) ) echo $user->get_error_message();
Source file:
wp_signon() is located in wp-includes/user.php.
Function to determine whether the user is logged in: is_user_logged_in()
Function introduction:
The is_user_logged_in() function determines whether the user is logged in. If the user is logged in, it returns True otherwise it returns False.
Function usage:
<?php if ( is_user_logged_in() ) { ... } ?>
Function parameters:
This function does not accept any parameters.
Return value:
(boolean)
Returns True if logged in, otherwise returns False.
Function instance:
The following example shows the content displayed by logged in users or non-logged in users:
<?php
if ( is_user_logged_in() ) {
echo 'Welcome, registered user!';
} else {
echo 'Welcome, visitor!';
}
?>
Source file:
is_user_logged_in() is located in the file wp-includes/pluggable.php.
Articles you may be interested in:
- Close the login page after logging in in WordPress and set up invisible columns for users
- Example sharing of PHP scripts to implement email reminders for visitor login in WordPress
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