email_exists() - WordPress 函数参考中文文档

返回介绍

email_exists()

发布于 2017-09-10 字数2168 浏览 1043 评论 0

email_exists( string $email )

Checks whether the given email exists.


描述


参数

$email

(string)
(Required)
Email.


返回值

(int|false) The user’s ID on success, and false on failure.


源代码

File: wp-includes/user.php

function email_exists( $email ) {
	if ( $user = get_user_by( 'email', $email) ) {
		return $user->ID;
	}
	return false;
}

更新日志

Version 描述
2.1.0 Introduced.

相关函数

Uses

  • wp-includes/pluggable.php:
    get_user_by()

Used By

  • wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php:
    WP_REST_Users_Controller::update_item()
  • wp-admin/includes/user.php:
    edit_user()
  • wp-includes/user.php:
    register_new_user()
  • wp-includes/user.php:
    wp_insert_user()
  • wp-includes/ms-functions.php:
    wpmu_validate_user_signup()

User Contributed Notes

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    Contributed by Codex

    Example
    If the E-mail exists, echo the ID number to which the E-mail is registered. Otherwise, tell the viewer that it does not exist.

    
    $email = 'myemail@example.com';
    $exists = email_exists( $email );
    if ( $exists ) {
    	echo "That E-mail is registered to user number " . $exists;
    } else {
    	echo "That E-mail doesn't belong to any registered users on this site";
    }
    

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