WordPress: From Antispambot to Zeroize

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From Antispambot to Zeroize, WordPress has all sorts of lesser known or used functions. This presentation given at WordCamp Jerusalem 2013 goes over 10 such functions.

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WordPress: From Antispambot to Zeroize

  1. 1. antispambot() ... zeroize()
  2. 2. $ whoami
  3. 3. Yoav FarhiDeveloperblog.yoavfarhi.com@yoavf
  4. 4. $ pwd
  5. 5. //antispambot()/** * Converts email addresses characters to HTML entities * to block spam bots. * * @return string Converted email address. */function antispambot($emailaddy, $mailto=0)?>Email me at:<?php echo antispambot(yoav@farhi.org); ?>Email me at:yoav@farhi.org
  6. 6. //checked(), selected(), disabled()/** * Outputs the html checked attribute. * * Compares the first two arguments and if identical * marks as checked * * @return string html attribute or empty string */function checked( $checked, $current = true, $echo = true )?><input type=checkbox name=postlink value=1 <?php if( 1 == $postlink ) echo checked="checked"; ?> /><input type="checkbox" name="postlink" value="1" <?phpchecked( $postlink, 1 ); ?> />
  7. 7. //human_time_diff()/** * Determines the difference between two timestamps. * * The difference is returned in a human readable * format such as "1 hour", * "5 mins", "2 days". * @return string Human readable time difference.*/function human_time_diff( $from, $to )?><?php echo human_time_diff(get_comment_time(U)). ago;?>//2 days ago
  8. 8. //wp_list_pluck()/** * Pluck a certain field out of each object in a list. * @return array */function wp_list_pluck( $list, $field );$foods = array(! array(! ! name => Banana,! ! color => Yellow,! ),! array(! ! name => Apple,! ! color => Red,! ),);$foods_names = wp_list_pluck( $foods, name );//$foods_names = array( Banana,Apple );$color_names = wp_list_pluck( $foods, color );//$color_names = array( Yellow,Red );
  9. 9. //wp_localize_script() //wordcamp.js jQuery(document).ready(function($){ alert(Welcome to WordCamp Jerusalem 2013); }); });
  10. 10. //wp_localize_script()/** * Used to localizes a script. * * @return bool Whether the localization was * added successfully. */function wp_localize_script( $handle, $object_name, $l10n );?><?phpwp_enqueue_script( wordcamp-jeruslaem, wordcamp.js );$translation_array = array( welcome => __( Welcome to WordCamp Jerusalem 2013 ));wp_localize_script( wordcamp-jeruslaem, wc_strings, $translation_array );?><script> var wc_strings = { welcome: 2013 ‫,ברוכים הבאים לוורדקמפ ירושלים‬ };</script>
  11. 11. //wp_localize_script() // WordCamp.js jQuery(document).ready(function($){ alert( wc_strings.welcome ); }); });
  12. 12. Let’s get to work cc-by galato901 http://yoav.fr/towork
  13. 13. //wp_kses()/** * Filters content and keeps only allowable HTML elements. * * @return string Filtered content with only * allowed HTML elements */function wp_kses($string, $allowed_html, $allowed_protocols);$tags = array( em => array(), strong => array());$html = <<<EOT<p>! <b>BOLD</b> is different than <em>italics</em></p>EOT;echo wp_kses( $html, $tags );//BOLD is different than <em>italics</em>
  14. 14. //wp_mail()/** * Send mail, similar to PHPs mail * * @return bool Whether the email contents were sent * successfully. */function wp_mail( $to, $subject, $message, $headers =, $attachments = array() );$to = yoav@farhi.org;$subject = I love WordPres;$message = WordPress is The Awesome!!!1;$mail = wp_mail( $to, $subject, $message );if( $mail )! echo Mail sent;
  15. 15. //wp_remote_get()/** * Retrieve the raw response from the HTTP * request using the GET method. * * @return WP_Error|array The response or * WP_Error on failure. */function wp_remote_get( $url, $args = array() );$url = http://nominatim.openstreetmap.org/search?q=Netanya&format=json;$response = wp_remote_get( $url );if ( ! is_wp_error( $response ) )! //Do something
  16. 16. //wp_trim_words()/** * Trims text to a certain number of words. * * @return string Trimmed text. */function wp_trim_words( $text, $num_words = 55, $more = null );$text = "I love WordPress and Joomla";echo wp_trim_words( $text, 3 );// I Love WordPress
  17. 17. //zeroise()/** * Add leading zeros when necessary. * * @return string Adds leading zeros to number if needed. */function zeroise($number, $threshold);$comno = get_comments_number();// $comno = 2$zeroed = zeroise($comno, 2);// $zeroed = 02
  18. 18. cc by-nc-nd anarosaphotography http://yoav.fr/happyHappy
  19. 19. questions ?
  20. 20. How can I get involvedwith the WordPress.org community?

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