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<?php
/**
* Author: wbolt team
* Author URI: https://www.wbolt.com/
*/
class Smart_SEO_Tool_Images
{
private $content = '%title%';
private $thumb = '%title%';
private $type = 1;
private $mode = 1;
public function __construct(){
$this->content = Smart_SEO_Tool_Common::cnf('img_seo.content');
$this->thumb = Smart_SEO_Tool_Common::cnf('img_seo.thumb');
$this->type = Smart_SEO_Tool_Common::cnf('img_seo.active');
$this->mode = Smart_SEO_Tool_Common::cnf('img_seo.mode');
if($this->type){
if($this->content){
add_filter( 'the_content', array( $this, 'handel_images' ), 500 );
}
if($this->thumb){
add_filter( 'post_thumbnail_html', array( $this, 'handel_images_featured' ), 500 ,2);
}
}
}
public function img_attr($attr,$search){
$content = $this->content;
foreach($search as $k=>$v){
$content = str_replace('%'.$k.'%',$v,$content);
}
return ' '.$attr.'="'.esc_attr($content).'"';
}
public function thumb_attr($attr,$search){
$content = $this->thumb;
foreach($search as $k=>$v){
$content = str_replace('%'.$k.'%',$v,$content);
}
return ' '.$attr.'="'.esc_attr($content).'"';
}
public function handel_images( $content ) {
if(!preg_match_all('#<img([^>]+)>#is',$content,$match)){
return $content;
}
$search = array('site_title'=>'','img_name'=>'','title'=>'','post_cat'=>'','num'=>'');
if(preg_match('#%site_title%#',$this->content)){
$search['site_title'] = get_bloginfo('name', 'display');
}
if(preg_match('#%title%#',$this->content)){
$search['title'] = get_the_title();
}
if(preg_match('#%post_cat%#',$this->content)){
$cate = get_the_category();
$post_cat = array();
if($cate){
foreach($cate as $term){
$post_cat[] = $term->name;
}
}
$search['post_cat'] = implode('、',$post_cat);
}
$img_seo = array();
$img_idx = -1;
foreach($match[1] as $k=>$img){
if(!preg_match('#src=.+#',$img)){
continue;
}
$img = trim($img,'/');
$src_img = $match[0][$k];//$img;
$img = str_replace(array('alt=""',"alt=''",'title=""',"title=''"),'',$img);
$img_key = md5($img);
if(!isset($img_seo[$img_key])){
$img_idx ++;
$img_seo[$img_key] = $img_idx;
}
$img_k = $img_seo[$img_key];
$add_html = '';
if($this->mode == 2){
$img = preg_replace('#\s+title="[^"]+"#is','',$img);
$img = preg_replace('#\s+title=\'[^\']+\'#is','',$img);
$img = preg_replace('#\s+alt="[^"]+"#is','',$img);
$img = preg_replace('#\s+alt=\'[^\']+\'#is','',$img);
}
$search['num'] = $img_k?$img_k:'';//'('.$img_k.')'
//empty title
if(!preg_match('#\s+title=.+?#is',$img)){
$search['img_name'] = '';
if(preg_match('#/.+?\.(jpg|jpeg|gif|webp|png|bmp)#is',$img,$name_match)){
$search['img_name'] = str_replace('-',' ',urldecode(basename($name_match[0])));
}
$add_html .= $this->img_attr('title',$search);
}
//empty alt
if(!preg_match('#\s+alt=.+?#is',$img)){
$search['img_name'] = '';
if(preg_match('#/.+?\.(jpg|jpeg|gif|webp|png|bmp)#is',$img,$name_match)){
//.esc_attr(basename($name_match[0])).'插图'.($img_k?'('.$img_k.')':'').'"';
$search['img_name'] = str_replace('-',' ',urldecode(basename($name_match[0])));
}
$add_html .= $this->img_attr('alt',$search);
}
if(!$add_html){
continue;
}
//$original = str_replace(array('alt=""',"alt=''",'title=""',"title=''"),'',$match[1][$k]);
$img = trim($img);
$new_img = '<img '.$img.$add_html.' />';
$content = str_replace($src_img,$new_img,$content);
}//end foreach match
return $content;
}
public function handel_images_featured( $html,$post_id ) {
if(!preg_match('#<img([^>]+)>#i',$html,$match)){
return $html;
}//end if preg_match image
$search = array('site_title'=>'','img_name'=>'','title'=>'','post_cat'=>'','num'=>'');
if(preg_match('#%site_title%#',$this->thumb)){
$search['site_title'] = get_bloginfo('name', 'display');
}
if(preg_match('#%title%#',$this->thumb)){
$search['title'] = get_the_title($post_id);
}
if(preg_match('#%post_cat%#',$this->thumb)){
$cate = get_the_category($post_id);
$post_cat = array();
if($cate){
foreach($cate as $term){
$post_cat[] = $term->name;
}
}
$search['post_cat'] = implode('、',$post_cat);
}
$img = trim($match[1],'/');
if(!preg_match('#src=.+#',$img)){
return $html;
}
$add_html = '';
//$post_title = get_the_title($post_id);
$img = str_replace(array('alt=""',"alt=''",'title=""',"title=''"),'',$img);
if($this->mode == 2){
$img = preg_replace('#\s+title="[^"]"#is','',$img);
$img = preg_replace('#\s+title=\'[^\']\'#is','',$img);
$img = preg_replace('#\s+alt="[^"]"#is','',$img);
$img = preg_replace('#\s+alt=\'[^\']\'#is','',$img);
}
if(!preg_match('#\s+title=.+?#is',$img)){
$search['img_name'] = '';
if(preg_match('#/.+?\.(jpg|jpeg|gif|webp|png|bmp)#is',$img,$name_match)){
$search['img_name'] = str_replace('-',' ',urldecode(basename($name_match[0])));
}
$add_html .= $this->thumb_attr('title',$search);
}
if(!preg_match('#\s+alt=.+?#is',$img)){
$search['img_name'] = '';
if(preg_match('#/.+?\.(jpg|jpeg|gif|webp|png|bmp)#is',$img,$name_match)){
$search['img_name'] = str_replace('-',' ',urldecode(basename($name_match[0])));
}
$add_html .= $this->thumb_attr('alt',$search);
}
if($add_html){
$img = trim($img);
$html = '<img '.$img.$add_html.' />';
}
return $html;
}
}