Question

username_exists( string $username )

Checks whether the given username exists.

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description

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参数

$username

(string) (Required) Username.

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返回值

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

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源代码

File: wp-includes/user.php

function username_exists( $username ) {
	if ( $user = get_user_by( 'login', $username ) ) {
		return $user->ID;
	}
	return false;
}

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更新日志

Version	description
2.0.0	Introduced.

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相关函数

Uses

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

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Used By

• wp-admin/includes/upgrade.php: wp_install()
• wp-admin/includes/user.php: edit_user()
• wp-admin/includes/class-wp-importer.php: WP_Importer::set_user()
• wp-includes/user.php: register_new_user()
• wp-includes/user.php: wp_insert_user()
• wp-includes/ms-functions.php: wpmu_activate_signup()
• wp-includes/ms-functions.php: wpmu_validate_user_signup()
• wp-includes/ms-functions.php: wpmu_validate_blog_signup()
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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: -1You must log in to vote on the helpfulness of this note Contributed by Codex

   Example
   Use username_exists() in your scripts to decide whether the given username exists.

   
   $username = sanitize_text_field( $_POST['username'] );
   if ( username_exists( $username ) ) {
   	echo "Username In Use!";
   else {
   	echo "Username Not In Use!";
   }