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do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 8 times in this file.
| Line | Code |
|---|---|
| 1760 | * |
| 1761 | * @since 1.5.0 |
| 1762 | * |
| 1763 | * @param string $email Email address to filter. |
| 1764 | * @return string Filtered email address. |
| 1765 | */ |
| 1766 | function sanitize_email( $email ) { |
| 1767 | // Test for the minimum length the email can be |
| 1768 | if ( strlen( $email ) < 3 ) { |
| 1769 | return apply_filters( 'sanitize_email', '', $email, 'email_too_short' ); |
| 1770 | } |
| 1771 | |
| 1772 | // Test for an @ character after the first position |
| 1773 | if ( strpos( $email, '@', 1 ) === false ) { |
| 1774 | return apply_filters( 'sanitize_email', '', $email, 'email_no_at' ); |
| 1775 | } |
| 1776 | |
| 1777 | // Split out the local and domain parts |
| 1778 | list( $local, $domain ) = explode( '@', $email, 2 ); |
| 1779 | |
| 1780 | // LOCAL PART |
| 1781 | // Test for invalid characters |
| 1782 | $local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local ); |
| 1783 | if ( '' === $local ) { |
| 1784 | return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' ); |
| 1785 | } |
| 1786 | |
| 1787 | // DOMAIN PART |
| 1788 | // Test for sequences of periods |
| 1789 | $domain = preg_replace( '/\.{2,}/', '', $domain ); |
| 1790 | if ( '' === $domain ) { |
| 1791 | return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' ); |
| 1792 | } |
| 1793 | |
| 1794 | // Test for leading and trailing periods and whitespace |
| 1795 | $domain = trim( $domain, " \t\n\r\0\x0B." ); |
| 1796 | if ( '' === $domain ) { |
| 1797 | return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' ); |
| 1798 | } |
| 1799 | |
| 1800 | // Split the domain into subs |
| 1801 | $subs = explode( '.', $domain ); |
| 1802 | |
| 1803 | // Assume the domain will have at least two subs |
| 1804 | if ( 2 > count( $subs ) ) { |
| 1805 | return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' ); |
| 1806 | } |
| 1807 | |
| 1808 | // Create an array that will contain valid subs |
| 1809 | $new_subs = array(); |
| 1810 | |
| 1811 | // Loop through each sub |
| 1812 | foreach ( $subs as $sub ) { |
| 1813 | // Test for leading and trailing hyphens |
| 1814 | $sub = trim( $sub, " \t\n\r\0\x0B-" ); |
| Line | Code |
| 1818 | |
| 1819 | // If there's anything left, add it to the valid subs |
| 1820 | if ( '' !== $sub ) { |
| 1821 | $new_subs[] = $sub; |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | // If there aren't 2 or more valid subs |
| 1826 | if ( 2 > count( $new_subs ) ) { |
| 1827 | return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' ); |
| 1828 | } |
| 1829 | |
| 1830 | // Join valid subs into the new domain |
| 1831 | $domain = join( '.', $new_subs ); |
| 1832 | |
| 1833 | // Put the email back together |
| 1834 | $email = $local . '@' . $domain; |
| 1835 | |
| 1836 | // Congratulations your email made it! |
| 1837 | return apply_filters( 'sanitize_email', $email, $email, null ); |
| 1838 | } |
| 1839 | |
| 1840 | /** |
| 1841 | * Determines the difference between two timestamps. |
| 1842 | * |
| 1843 | * The difference is returned in a human readable format such as "1 hour", |
| 1844 | * "5 mins", "2 days". |
| 1845 | * |
| 1846 | * @since 1.5.0 |