is_email() │ WP 0.71

if( is_email( $email ) ){
	// це пошта...
}

<?php
if ( is_email( '[email protected]' ) ) {
	  echo 'email адреса коректна.';
}
?>

список змін

Код is_email() is email ^{WP 6.0.2}

function is_email( $email, $deprecated = false ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '3.0.0');
	}

	// Test for the minimum length the email can be.
	if ( strlen ( $ email ) < 6 ) {
		/**
		 * Filters whether an email address is valid.
		 *
		 * Цей filter is evaluated under several different contexts, such as 'email_too_short',
		 * 'email_no_at', 'local_invalid_chars', 'domain_period_sequence', 'domain_period_limits',
		 * 'domain_no_periods', 'sub_hyphen_limits', 'sub_invalid_chars', або не specific context.
		 *
		 * @ Since 2.8.0
		 *
		 * @param string|false $is_email Електронна адреса, якщо успішно пройде is_email() checks, false otherwise.
		 * @param string $email The email address being checked.
		 * @param string $context Context під яким email був tested.
		 */
		return apply_filters( 'is_email', false, $email, 'email_too_short' );
	}

	// Test for an @ character after the first position.
	if ( strpos( $email, '@', 1 ) === false ) {
		/** Цей filter is documented в wp-includes/formatting.php */
		return apply_filters( 'is_email', false, $email, 'email_no_at' );
	}

	// Split out the local and domain parts.
	list ($ local, $ domain) = explode ( '@', $ email, 2);

	// LOCAL PART
	// Test for invalid characters.
	if ( ! preg_match( '/^[a-zA-Z0-9!#$%&'*+/=?^_`{|}~.-]+$/', $local ) ) {
		/** Цей filter is documented в wp-includes/formatting.php */
		return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
	}

	// DOMAIN PART
	// Test for sequences of periods.
	if ( preg_match( '/.{2,}/', $domain ) ) {
		/** Цей filter is documented в wp-includes/formatting.php */
		return apply_filters( 'is_email', false, $email, 'domain_period_sequence' );
	}

	// Test for leading and trailing periods and whitespace.
	if ( trim( $domain , " tnrx0B. " ) !== $domain ) {
		/** Цей filter is documented в wp-includes/formatting.php */
		return apply_filters( 'is_email', false, $email, 'domain_period_limits' );
	}

	// Split the domain into subs.
	$subs = explode('.', $domain);

	// Assume the domain will have at least two subs.
	if ( 2 > count( $subs ) ) {
		/** Цей filter is documented в wp-includes/formatting.php */
		return apply_filters( 'is_email', false, $email, 'domain_no_periods' );
	}

	// Loop through each sub.
	foreach ( $subs as $sub ) {
		// Test for leading and trailing hyphens and whitespace.
		if ( trim( $sub, " tnrx0B-" ) !== $sub ) {
			/** Цей filter is documented в wp-includes/formatting.php */
			return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' );
		}

		// Test for invalid characters.
		if ( ! preg_match( '/^[a-z0-9-]+$/i', $sub ) ) {
			/** Цей filter is documented в wp-includes/formatting.php */
			return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' );
		}
	}

	// Congratulations, your email made it!
	/** Цей filter is documented в wp-includes/formatting.php */
	return apply_filters('is_email', $email, $email, null);
}

Зв’язані функції

validate (перевірка)

Умовні теги (все)

Перевірки (checks)