我有以下代码可以从给定帐户中抓取Instagram图片：
<?php
class Scrape_Instagram {
private $images = array();
public function __construct( $username ) {
$this->username = $username;
}
private function build_endpoint() {
/**
* Builds the endpoint for the Instagram API, provided the username from constructor.
* @param $end_cursor Used in case the user wants more pictures to be scrapped.
*/
return \'https://www.instagram.com/\' . trim( strtolower( $this->username ) ) . \'/?__a=1\';
}
private function get_json() {
/**
* GET\'s the data from Instagram, provided the endpoint.
*/
$request = wp_remote_get( $this->build_endpoint() );
if( is_wp_error( $request ) ) {
return new WP_Error( \'site-down\', esc_html__( \'Instagram may be down. Unable to communicate.\', \'_s\') );
}
elseif( wp_remote_retrieve_response_code( $request ) !== 200 ) {
return new WP_Error( \'invalid-response\', esc_html__( \'Got an invalid response.\', \'_s\') );
}
else {
return wp_remote_retrieve_body( $request );
}
}
private function get_data() {
/**
* Ingests the data from get_json() then converts / decodes into an array.
*/
$data = json_decode( $this->get_json(), true);
if ( is_wp_error( $data ) ) {
return new WP_Error( \'invalid-data\', esc_html__( \'Something is wrong. Did you enter the right username?\', \'_s\' ) );
} else {
return $data;
}
}
protected function get_links() {
/**
* Based on the array generated from get_data(), some nodes have resulted that contain information about
* each photo the user has, as such, we\'ll loop through each photo and access any data.
* @see [\'user\'][\'media\'][\'nodes\'] - individual node / image.
*/
$response = $this->get_data();
foreach( $response[\'user\'][\'media\'][\'nodes\'] as $node ) {
// Check if type is video, if not, set default image
array_push( $this->images, $node[\'thumbnail_src\'] );
}
return $this->images;
}
public function get_instagram_photos_links() {
return $this->get_links();
}
}
有几个
WP_Error 处理它检查的变量可能产生的错误。
因此，在方法中get_json(), 我有：
private function get_json() {
/**
* GET\'s the data from Instagram, provided the endpoint.
*/
$request = wp_remote_get( $this->build_endpoint() );
if( is_wp_error( $request ) ) {
return new WP_Error( \'site-down\', esc_html__( \'Instagram may be down. Unable to communicate.\', \'_s\') );
}
elseif( wp_remote_retrieve_response_code( $request ) !== 200 ) {
return new WP_Error( \'invalid-response\', esc_html__( \'Got an invalid response.\', \'_s\') );
}
else {
return wp_remote_retrieve_body( $request );
}
}
哪个应该停止
$data 如果失败，就无法获得任何价值。我想要/认为它会做的是（尽管我知道我第一次声明
$data):
Hey, WordPress, see this $data? Yea, don\'t assign anything to it if these WP_Errors say it\'s bad. Just drop it and break loop..
不幸的是，这并没有发生，我已经为此构建了一个小部件，使用：
<?php
/**
* Plugin Name: Instagram Widget
*/
add_action( \'widget_init\', \'custom_widget_instagram_pictures\');
register_widget( \'custom_widget_instagram_pictures\' );
class custom_widget_instagram_pictures extends Wp_Widget {
/**
* Setup the Widget
*/
public function __construct() {
$widget_ops = array(\'classname\' => \'custom_widget_instagram_pictures\',
\'description\' => esc_html__(\'A widget to display instagram photos.\', \'_s\')
);
$control_ops = array(\'id_base\' => \'custom_widget_instagram_pictures\');
parent::__construct( \'custom_widget_instagram_pictures\', __(\'_s: Instagram Widget\', \'_s_simple_image_widget\'), $widget_ops, $control_ops );
}
public function widget( $args, $instance ) {
extract( $args );
$title = isset( $instance[\'title\'] ) ? apply_filters(\'widget_title\', $instance[\'title\'] ) : \'\';
$username = isset( $instance[\'username\'] ) ? $instance[\'username\'] : \'\';
$profile_link = isset( $instance[\'profile_link\'] ) ? $instance[\'profile_link\'] : \'\';
echo ent2ncr( $before_widget );
if ( $title ) {
echo ent2ncr( $before_title . $title . $after_title );
}
?>
<div class="instagram-widget">
<ul class="instagram-widget-list">
<?php if( $username ) {
$instagram_object = new Scrape_Instagram($username);
$instagram_links = $instagram_object->get_instagram_photos_links();
foreach( $instagram_links as $link ) { ?>
<li class="instagram-thumb">
<a href="<?php echo $link ?>"><img src="<?php echo $link ?>"/></a>
</li>
<?php }
} ?>
</ul>
<?php if( \'on\' == $profile_link ) : ?>
<button class="instagram-widget-profile-link"><a href="<?php echo \'https://www.instagram.com/\' . $username; ?>"><?php echo $username ?></a></button>
<?php endif; ?>
</div>
<?php
echo ent2ncr( $after_widget );
}
function update( $new_instance, $old_instance ) {
$instance[\'title\'] = ( isset( $new_instance[\'title\'] ) ) ? strip_tags($new_instance[\'title\'] ) : \'\';
$instance[\'username\'] = ( isset( $new_instance[\'username\'] ) ) ? strip_tags( $new_instance[\'username\'] ) : \'\';
$instance[\'profile_link\'] = ( isset( $new_instance[\'profile_link\'] ) ) ? strip_tags( $new_instance[\'profile_link\'] ) : \'\';
return $instance;
}
function form( $instance ) {
$defaults = array( \'title\' => \'\',
\'username\' => \'\',
\'profile_link\' => \'\',
);
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<!-- Form for Title -->
<p>
<label for="<?php echo $this->get_field_id( \'title\' ); ?>">Widget Title:<strong>(Leave Blank to Hide)</strong></label>
<br>
<input class="widefat" id="<?php echo $this->get_field_id( \'title\' ); ?>" name="<?php echo $this->get_field_name( \'title\' ); ?>" value="<?php echo $instance[\'title\'];?>" />
</p>
<!-- Form for Link -->
<p>
<label for="<?php echo $this->get_field_id( \'username\' ); ?>">Username:</label>
<br>
<input class="widefat" id="<?php echo $this->get_field_id( \'username\' ); ?>" name="<?php echo $this->get_field_name( \'username\' ); ?>" value="<?php echo $instance[\'username\'];?>" />
</p>
<!-- The checkbox -->
<p>
<input class="checkbox" type="checkbox" <?php checked( $instance[ \'profile_link\' ], \'on\' ); ?> id="<?php echo $this->get_field_id( \'profile_link\' ); ?>" name="<?php echo $this->get_field_name( \'profile_link\' ); ?>" />
<label for="<?php echo $this->get_field_id( \'profile_link\' ); ?>">Show Instagram Button?</label>
</p>
<?php
}
}
?>
如果我输入了错误的用户名，请说：“kinfolk53252395932”，它只会抛出以下内容：
我怎样才能做到这一点？
