Малоизвестные функции в WordPress [WordCamp Russia 2014]

«МАЛОИЗВЕСТНЫЕ ФУНКЦИИ В WORDPRESS»

АЛЕКСАНДР СТРИХАCTO PINGBULL LLC

Велокодер

WordPress Man

$email = "[email protected]";

ПРОВЕРИТЬ E-MAILЗАДАЧА

if( preg_match( "/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email ) ) { // valid}




if( filter_var( $email, FILTER_VALIDATE_EMAIL ) ) { // valid}




if( filter_var( $email, FILTER_VALIDATE_EMAIL ) ) { // valid}

if( is_email( $email ) ) { // valid}




ЗАЩИТИТЬ E-MAIL ОТ СПАМАЗАДАЧА

$safe_email = '';for ( $i = 0; $i < strlen( $email ); $i++ ) { $safe_email .= '&#' . ord( $email[ $i ] ) . ';';}



$safe_email = '';for ( $i = 0; $i < strlen( $email ); $i++ ) { $safe_email .= '&#' . ord( $email[ $i ] ) . ';';}

$safe_email = antispambot( $email );



$text = "My email: [email protected]\n My blog: http://example.com";

СДЕЛАТЬ ССЫЛКИ В ТЕКСТЕ КЛИКАБЕЛЬНЫМИЗАДАЧА

$clickable_text = preg_replace( '!(((f|ht)tp(s)?://)[-a-zA-а-яА-Я()0-9@:%_+.~#?&;//=]+)!i' , '<a href="$1">$1</a>', $text );



$clickable_text = preg_replace( '!(((f|ht)tp(s)?://)[-a-zA-а-яА-Я()0-9@:%_+.~#?&;//=]+)!i' , '<a href="$1">$1</a>', $text );

$clickable_text = make_clickable( $text );



$text = "Tweet by <a href='http://example.com'>William</a>";

ОТКРЫВАТЬ ССЫЛКИ В НОВОМ ОКНЕЗАДАЧА

$external_clickable_text = preg_replace( '/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text );



$external_clickable_text = preg_replace( '/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text );

$external_clickable_text = popuplinks( $text );



$posts = get_posts();

ПОЛУЧИТЬ МАССИВ АТРИБУТОВ ИЗ КОЛЛЕКЦИИЗАДАЧА

$titles = array();foreach( $posts as $post ) { $titles[] = $post->post_title; }




$titles = array_map( 'array_map_callback', $posts );function array_map_callback( $post ) { return $post->post_title; }




$titles = array_map( 'array_map_callback', $posts );function array_map_callback( $post ) { return $post->post_title; }

$titles = wp_list_pluck( $posts, 'post_title' );



ДОБАВИТЬ CHECKED АТРИБУТ К CHECKBOXЗАДАЧА

<input type="checkbox" name="remember" value="1" <?php if ( $_POST['remember'] == 1 ){ echo 'checked="checked"'; } ?> />


<input type="checkbox" name="remember" value="1" <?php if ( $_POST['remember'] == 1 ){ echo 'checked="checked"'; } ?> />

<input type="checkbox" name="remember" value="1" <?php checked( $_POST['remember'] ) ?> />


$published = strtotime( $post->post_date );

ВЫЧИСЛИТЬ РАЗНИЦУ ВО ВРЕМЕНИЗАДАЧА

$now = time();$dif = $now - $published;if ( $dif < 60 ) { // a lot of code here...



$now = time();$dif = $now - $published;if ( $dif < 60 ) { // a lot of code here...

$string = human_time_diff( $published );



$result = array( 'success' => true, 'data' => 'Some data' );

ВЫВЕСТИ ДАННЫЕ В JSON ФОРМАТЕЗАДАЧА

header( 'Content-Type: application/json' );echo json_encode( $result );wp_die();




wp_send_json( $result );




wp_send_json( $result );

wp_send_json_success( 'Some data' );



ПОЛУЧИТЬ ДАННЫЕ СО СТОРОННЕГО РЕСУРСАЗАДАЧА

$tweets = file_get_contents( "https://api.twitter.com/1.1/search/tweets.json?q=%23WordPress" );



$curl = curl_init();curl_setopt( $curl, CURLOPT_URL, "https://api.twitter.com/1.1/search/tweets.json" );curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );curl_setopt( $curl, CURLOPT_POST, true );curl_setopt( $curl, CURLOPT_POSTFIELDS, "q=%23WordPress" );$tweets$tweets = curl_exec( $curl );curl_close( $curl );



$curl = curl_init();curl_setopt( $curl, CURLOPT_URL, "https://api.twitter.com/1.1/search/tweets.json" );curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );curl_setopt( $curl, CURLOPT_POST, true );curl_setopt( $curl, CURLOPT_POSTFIELDS, "q=%23WordPress" );$tweets$tweets = curl_exec( $curl );curl_close( $curl );

$response = wp_remote_get( "https://api.twitter.com/1.1/search/tweets.json?q=%23WordPress" );$tweets = wp_remote_retrieve_body( $response );


ОПРЕДЕЛИТЬ УСТРОЙСТВО ПОСЕТИТЕЛЯЗАДАЧА

$is_mobile = preg_match( "/(android|phone|blackberry|***|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"] );


$is_mobile = preg_match( "/(android|phone|blackberry|***|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"] );

$is_mobile = wp_is_mobile();


$video = 'https://www.youtube.com/watch?v=Lcvh0DgytH8';

ПРЕОБРАЗОВАТЬ ССЫЛКИ НА ВИДЕО В HTML КОД ПЛЕЕРАЗАДАЧА

if( false !== mb_strpos( $video, 'youtu' ) ) { $url = parse_url( $video ); parse_str( $url[ 'query' ], $query ); $id = $query[ 'v' ]; $embed_code = "<iframe width='560' height='315' src='//www.youtube.com/embed/{$id}' frameborder='0' allowfullscreen></iframe>";}



if( false !== mb_strpos( $video, 'youtu' ) ) { $url = parse_url( $video ); parse_str( $url[ 'query' ], $query ); $id = $query[ 'v' ]; $embed_code = "<iframe width='560' height='315' src='//www.youtube.com/embed/{$id}' frameborder='0' allowfullscreen></iframe>";}

$embed_code = wp_oembed_get( $video );



$dir = get_template_directory();

СОЗДАТЬ ВРЕМЕННЫЙ ФАЙЛ С УНИКАЛЬНЫМ ИМЕНЕМЗАДАЧА

do { $filename = uniqid();}while( file_exists( $dir . DIRECTORY_SEPARATOR . $filename ) );touch( $dir . DIRECTORY_SEPARATOR . $filename );



do { $filename = uniqid();}while( file_exists( $dir . DIRECTORY_SEPARATOR . $filename ) );touch( $dir . DIRECTORY_SEPARATOR . $filename );

$filename = wp_tempnam( null, $dir );



$number = 83; $length = 5;

ДОПОЛНИТЬ ЧИСЛО НУЛЯМИ ДО НУЖНОГО КОЛИЧЕСТВА СИМВОЛОВЗАДАЧА

$string = sprintf( '%0' . $length . 's', $number );




$string = $number;for( $i = mb_strlen( $number ); $i < $length; $i++ ) { $string = 0 . $string; }




$string = $number;for( $i = mb_strlen( $number ); $i < $length; $i++ ) { $string = 0 . $string; }

$string = zeroise( $number, $length )



$jsonp_url = "/ajax/search/callback=?"; $message = "Hello World!";

ЗАДАТЬ JAVASCRIPT ПЕРЕМЕННЫЕ ИЗ PHPЗАДАЧА

wp_enqueue_script( 'my-script', $script_url, array( 'jquery' ) );echo "<script> var MyScript = { jsonpUrl: '$jsonp_url', message: '$message' }; </script>";



wp_enqueue_script( 'my-script', $script_url, array( 'jquery' ) );echo "<script> var MyScript = { jsonpUrl: '$jsonp_url', message: '$message' }; </script>";

wp_enqueue_script( 'my-script', $script_url, array( 'jquery' ) );wp_localize_script( 'my-script', 'MyScript', array( 'jsonpUrl' => $jsonp_url, 'message' => $message ));



ПОЛЕЗНЫЙ PHP САХАР

add_action( 'save_post', 'save_post_callback' );function save_post_callback( $post_id ) { /* some stuff */ }

Fatal error: Cannot redeclare save_post_callback()




add_action( 'save_post', 'save_post_type_callback' );function save_post_type_callback( $post_id ) { /* some stuff */ }

Fatal error: Cannot redeclare save_post_type_callback()






add_action( 'save_post', 'the_save_post_type_callback' );function the_save_post_type_callback( $post_id ) { /* some stuff */ }

Fatal error: Cannot redeclare the_save_post_type_callback()






add_action( 'save_post', 'the_save_post_type_callback' );function the_save_post_type_callback( $post_id ) { /* some stuff */ }

Fatal error: Cannot redeclare the_save_post_type_callback()

add_action( 'save_post', 'JUST_SAVE_THIS_F_POST' );function JUST_SAVE_THIS_F_POST( $post_id ) { /* some stuff */ }

Success!



add_action( 'save_post', function( $post_id ) { // some stuff});

class My_Plugin { public function register_actions() { add_action( 'save_post', array( $this, 'save_product_callback') ); add_action( 'save_post', array( $this, 'save_product_meta_callback') ); } private function save_product_callback( $post_id ) { // some stuff // some stuff } private function save_product_meta_callback( $post_id ) { // some stuff }}

Warning: cannot access private method My_Plugin::save_product_callback()


class My_Awesome_Plugin { public function register_actions() { add_action( 'save_post', function( $post_id ) { $this->save_product_callback( $post_id ); $this->save_product_meta_callback( $post_id ); }); } private function save_product_callback( $post_id ) { // some stuff } private function save_product_meta_callback( $post_id ) { // some stuff }}}


$post_ids = array_map( function( $post ) { return $post->ID;}, $posts );

$published_posts = array_filter( $posts , function( $post ) { return $post->post_status == 'publish';});

usort( $posts, function( $post_one, $post_two ) { return strcmp( $post_one->post_title, $post_two->post_title );});


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Малоизвестные функции в WordPress [WordCamp Russia 2014]