Question

antispambot( string $email_address,  int $hex_encoding )

Converts email addresses characters to HTML entities to block spam bots.

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description

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参数

$email_address

(string) (Required) Email address.

$hex_encoding

(int) (Optional) Set to 1 to enable hex encoding.

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返回值

(string) Converted email address.

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源代码

File: wp-includes/formatting.php

function antispambot( $email_address, $hex_encoding = 0 ) {
	$email_no_spam_address = '';
	for ( $i = 0, $len = strlen( $email_address ); $i < $len; $i++ ) {
		$j = rand( 0, 1 + $hex_encoding );
		if ( $j == 0 ) {
			$email_no_spam_address .= '&#' . ord( $email_address[$i] ) . ';';
		} elseif ( $j == 1 ) {
			$email_no_spam_address .= $email_address[$i];
		} elseif ( $j == 2 ) {
			$email_no_spam_address .= '%' . zeroise( dechex( ord( $email_address[$i] ) ), 2 );
		}
	}

	return str_replace( '@', '@', $email_no_spam_address );
}

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更新日志

Version	description
0.71	Introduced.

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相关函数

Uses

• wp-includes/formatting.php: zeroise()

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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

   
   /**
    * Hide email from Spam Bots using a shortcode.
    *
    * @param array  $atts    Shortcode attributes. Not used.
    * @param string $content The shortcode content. Should be an email address.
    * @return string The obfuscated email address. 
    */
   function wpdocs_hide_email_shortcode( $atts , $content = null ) {
   	if ( ! is_email( $content ) ) {
   		return;
   	}
   	return '<a href="mailto:' . antispambot( $content ) . '">' . antispambot( $content ) . '</a>';
   }
   add_shortcode( 'email', 'wpdocs_hide_email_shortcode' );
   

   To use this in your WordPress Content area all you have to do it wrap it in a short code.

   
   [email]john.doe@mysite.com[/email]
   

   You can also use this in a plain text widget if you add this filter to your function file as well.

   
   add_filter( 'widget_text', 'shortcode_unautop' );
   add_filter( 'widget_text', 'do_shortcode' );