wordpress外链图片下载到本地化

我们在做wordpress网站中，常常会复制到站外的图片，如果手动下载再上传比较麻烦，所以需要自动下载图片的功能。

下面给大家介绍一个非插件的简单方法，只需要在主题函数functions.php中加入一下代码：

add_filter('content_save_pre', 'auto_save_image');
function auto_save_image($content) {
 $upload_path = '';
 $upload_url_path = get_bloginfo('url');
   
 //上传目录
 if (($var = get_option('upload_path')) !=''){
 $upload_path = $var;
 } else {
 $upload_path = 'wp-content/uploads';
 }
 if(get_option('uploads_use_yearmonth_folders')) {
 $upload_path .= '/'.date("Y",time()).'/'.date("m",time());
 }
   
 //文件地址
 if(($var = get_option('upload_url_path')) != '') {
 $upload_url_path = $var;
 } else {
 $upload_url_path = bloginfo('url');
 }
 if(get_option('uploads_use_yearmonth_folders')) {
 $upload_url_path .= '/'.date("Y",time()).'/'.date("m",time());
 }
   
 require_once ("../wp-includes/class-snoopy.php");
 $snoopy_Auto_Save_Image = new Snoopy;
   
 $img = array();
   
 //以文章的标题作为图片的标题
 if ( !empty( $_REQUEST['post_title'] ) )
 $post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));
 $text = stripslashes($content);
 if (get_magic_quotes_gpc()) $text = stripslashes($text);
 preg_match_all("/ src=("|'){0,}(http://(.+?))("|'|s)/is",$text,$img);
 $img = array_unique(dhtmlspecialchars($img[2]));
 foreach ($img as $key => $value){
 set_time_limit(180); //每个图片最长允许下载时间,秒
 if(str_replace(get_bloginfo('url'),"",$value)==$value&&str_replace(get_bloginfo('home'),"",$value)==$value){
 //判断是否是本地图片，如果不是，则保存到服务器
 $fileext = substr(strrchr($value,'.'),1);
 $fileext = strtolower($fileext);
 if($fileext==""||strlen($fileext)>4)
 $fileext = "jpg";
 $savefiletype = array('jpg','gif','png','bmp');
 if (in_array($fileext, $savefiletype)){
 if($snoopy_Auto_Save_Image->fetch($value)){
 $get_file = $snoopy_Auto_Save_Image->results;
 }else{
 echo "error fetching file: ".$snoopy_Auto_Save_Image->error."<br>";
 echo "error url: ".$value;
 die();
 }
 $filetime = time();
 $filepath = "/".$upload_path;//图片保存的路径目录
 !is_dir("..".$filepath) ? mkdirs("..".$filepath) : null;
 //$filename = date("His",$filetime).random(3);
 $filename = substr($value,strrpos($value,'/'),strrpos($value,'.')-strrpos($value,'/'));
   
 //$e = '../'.$filepath.$filename.'.'.$fileext;
 //if(!is_file($e)) {
 // copy(htmlspecialchars_decode($value),$e);
 //}
 $fp = @fopen("..".$filepath.$filename.".".$fileext,"w");
 @fwrite($fp,$get_file);
 fclose($fp);
   
   
   
 $wp_filetype = wp_check_filetype( $filename.".".$fileext, false );
 $type = $wp_filetype['type'];
 $post_id = (int)$_POST['temp_ID2'];
 $title = $post_title;
 $url = $upload_url_path.$filename.".".$fileext;
 $file = $_SERVER['DOCUMENT_ROOT'].$filepath.$filename.".".$fileext;
   
 //添加数据库记录
 $attachment = array(
 'post_type' => 'attachment',
 'post_mime_type' => $type,
 'guid' => $url,
 'post_parent' => $post_id,
 'post_title' => $title,
 'post_content' => '',
 );
 $id = wp_insert_attachment($attachment, $file, $post_parent);
 $text = str_replace($value,$url,$text); //替换文章里面的图片地址
 }
 }
 }
 $content = AddSlashes($text);
 remove_filter('content_save_pre', 'auto_save_image');
 return $content;
}
   
function mkdirs($dir)
{
 if(!is_dir($dir))
 {
 mkdirs(dirname($dir));
 mkdir($dir);
 }
 return ;
}
function dhtmlspecialchars($string) {
 if(is_array($string)) {
 foreach($string as $key => $val) {
 $string[$key] = dhtmlspecialchars($val);
 }
 }else{
 $string = str_replace('&', '&', $string);
 $string = str_replace('"', '"', $string);
 $string = str_replace('<', '<', $string);
 $string = str_replace('>', '>', $string);
 $string = preg_replace('/&(#d;)/', '&1', $string);
 }
 return $string;
}

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add_filter('content_save_pre', 'auto_save_image');

function auto_save_image($content) {

$upload_path = '';

$upload_url_path = get_bloginfo('url');

//上传目录

if (($var = get_option('upload_path')) !=''){

$upload_path = $var;

} else {

$upload_path = 'wp-content/uploads';

}

if(get_option('uploads_use_yearmonth_folders')) {

$upload_path .= '/'.date("Y",time()).'/'.date("m",time());

}

//文件地址

if(($var = get_option('upload_url_path')) != '') {

$upload_url_path = $var;

} else {

$upload_url_path = bloginfo('url');

}

if(get_option('uploads_use_yearmonth_folders')) {

$upload_url_path .= '/'.date("Y",time()).'/'.date("m",time());

}

require_once ("../wp-includes/class-snoopy.php");

$snoopy_Auto_Save_Image = new Snoopy;

$img = array();

//以文章的标题作为图片的标题

if ( !empty( $_REQUEST['post_title'] ) )

$post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));

$text = stripslashes($content);

if (get_magic_quotes_gpc()) $text = stripslashes($text);

preg_match_all("/ src=("|'){0,}(http://(.+?))("|'|s)/is",$text,$img);

$img = array_unique(dhtmlspecialchars($img[2]));

foreach ($img as $key => $value){

set_time_limit(180); //每个图片最长允许下载时间,秒

if(str_replace(get_bloginfo('url'),"",$value)==$value&&str_replace(get_bloginfo('home'),"",$value)==$value){

//判断是否是本地图片，如果不是，则保存到服务器

$fileext = substr(strrchr($value,'.'),1);

$fileext = strtolower($fileext);

if($fileext==""||strlen($fileext)>4)

$fileext = "jpg";

$savefiletype = array('jpg','gif','png','bmp');

if (in_array($fileext, $savefiletype)){

if($snoopy_Auto_Save_Image->fetch($value)){

$get_file = $snoopy_Auto_Save_Image->results;

}else{

echo "error fetching file: ".$snoopy_Auto_Save_Image->error."<br>";

echo "error url: ".$value;

die();

}

$filetime = time();

$filepath = "/".$upload_path;//图片保存的路径目录

!is_dir("..".$filepath) ? mkdirs("..".$filepath) : null;

//$filename = date("His",$filetime).random(3);

$filename = substr($value,strrpos($value,'/'),strrpos($value,'.')-strrpos($value,'/'));

//$e = '../'.$filepath.$filename.'.'.$fileext;

//if(!is_file($e)) {

// copy(htmlspecialchars_decode($value),$e);

//}

$fp = @fopen("..".$filepath.$filename.".".$fileext,"w");

@fwrite($fp,$get_file);

fclose($fp);

$wp_filetype = wp_check_filetype( $filename.".".$fileext, false );

$type = $wp_filetype['type'];

$post_id = (int)$_POST['temp_ID2'];

$title = $post_title;

$url = $upload_url_path.$filename.".".$fileext;

$file = $_SERVER['DOCUMENT_ROOT'].$filepath.$filename.".".$fileext;

//添加数据库记录

$attachment = array(

'post_type' => 'attachment',

'post_mime_type' => $type,

'guid' => $url,

'post_parent' => $post_id,

'post_title' => $title,

'post_content' => '',

);

$id = wp_insert_attachment($attachment, $file, $post_parent);

$text = str_replace($value,$url,$text); //替换文章里面的图片地址

}

$content = AddSlashes($text);

remove_filter('content_save_pre', 'auto_save_image');

return $content;

}

function mkdirs($dir)

{

if(!is_dir($dir))

{

mkdirs(dirname($dir));

mkdir($dir);

}

return ;

}

function dhtmlspecialchars($string) {

if(is_array($string)) {

foreach($string as $key => $val) {

$string[$key] = dhtmlspecialchars($val);

}

}else{

$string = str_replace('&', '&', $string);

$string = str_replace('"', '"', $string);

$string = str_replace('<', '<', $string);

$string = str_replace('>', '>', $string);

$string = preg_replace('/&(#d;)/', '&1', $string);

}

return $string;

}

这样在发文章的时候就可以自动下载远程图片到本地。

wordpress外链图片下载到本地化

wordpress外链图片下载到本地化

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