The bright spot of this article is that the regular-style more complex bird, ╮@@facesymbol@@╭, and then the Copy function of a gray often powerful one usage.
> say just now listen to Nsyta said the theme of small evil white, cups. Recently too busy, not free, or to do a new theme on their own.
A. Crawl a picture in a CSS:
> 1. First, prepare for the job:
> First, the original path to the CSS stored in the $url variables, and then the content of the CSS stored in the ABC.CSS.
> Because of the fact that you often encounter multiple CSS files, it does not fill a CSS path directly.
> Instead, combine the contents of several CSS files together, and plug them all into the Abc.css file, quack.
$data = file_get_contents (' abc.css ');
> Then read the contents of the CSS file into the $data variable, and then use the regular type to take out the domain name.
> Because a lot of picture files are used in relative root paths, such as/img/1.gif and Img/1.gif.
> then CSS original address in http://www.jb51.net/css/so the top two file locations are different.
> The first file is/upload/201109/20110926143903807.gif because its path uses a relative root path.
> and the second in/upload/201109/20110926143903169.gif, its path is just a normal relative path.
Copy Code code as follows:
$url = ' http://www.jb51.net/css/'; Preg_match ('/(. *\/\/.*?) \//', $url, $host);
Here use the regular formula to remove the http://www.jb51.net/, the back end do not forget to add a slash.
//.*? is lazy matching, that is, the less matching can match the less content, so that will not overdo it.
$host = $host [1];
2. Set up the Image storage folder:
> Small evil here with the Is_dir to determine whether the folder exists, there is no need to build a second time.
> Oh, by the way, the Is_file function can determine whether this file is a normal file or not.
> But file_exists () is a bit superior because it's been discussed on webmasterworld.com one time.
if (!is_dir (' img ')) {mkdir (' img ');}
> 3. Use a regular formula to take out the relative address of the picture:
$regex = '/url\ (\ ' {0,1}\ ' {0,1} (. *?) \ ' {0,1}\ ' {0,1}\)/';
//Here is a regular match to the image address, consider three cases, that is, url (1.gif) url (' 1.gif ') url ("1.gif").
//These three types of writing are available, so let's take the 1.gif from the top to get it out.
//\ ' {0,1} indicates that single quotes can occur 1 or 0 times, \ "means that double quotes can occur 1 or 0 times.
//The middle must use lazy match, otherwise take out is 1.gif "instead of 1.gif Bird, O (∩_∩) P.
Preg_match_all ($regex, $data, $result);
> 4. Work with these images:
> First use a loop, which is the first branch of the array to be extracted from the above is processed.
>, the first branch here represents the first bracket in the regular style, hehe, and so on. The
foreach ($result [1] as $val) {}
> is then judged with a regular, because it also takes into account such/upload/201109/20110926143903807.gif.
> This is done using the full path instead of/img/1.gif or img/1.gif like the others.
> So judge it alone, and then judge the two, and see if it's/img/1.gif or img/1.gif.
Copy Code code as follows:
if (Preg_match ('/^http.*/', $val)) {$target = $val;}
else if (preg_match ('/^\/.*/', $val)) {$target = $host. $val;}
else {$target = $url. $val;}
echo $target. " <br/>\r\n ";
> Finally remove the file name, that is, the 1.gif in the/img/1.gif, for saving files.
Copy Code code as follows:
Preg_match ('/.*\/(. *\.\d+) $/', $val, $name);
> Then we can start downloading, and here's a powerful Copy function usage.
Copy Code code as follows:
if (!is_file ('./img/'. $name [1])) {
$IMGC = file_get_contents ($target);
$handle = fopen ('./img/'. $name [1], ' w+ ');
Fwrite ($handle, $IMGC);
Fclose ($handle);
}
> Top that's our old way, quack, it's troublesome. One time, little evil suddenly found the strong Copy.
> Copy can also download, so you can easily use the following code to deal with the above can be retired birds.
Copy Code code as follows:
if (!is_file ('./img/'. $name [1])) {
Copy ($target, './img/'. $name [1]);
}
> 5. Complete source code:
> Fill in the $url when used, and then save all the CSS content in Abc.css.
Copy Code code as follows:
<?php
$url = ' http://www.jb51.net/css/';
$data = file_get_contents (' abc.css ');
Preg_match ('/(. *\/\/.*?) \//', $url, $host);
$host = $host [1];
if (!is_dir (' img ')) {mkdir (' img ');}
$regex = '/url\ (\ ' {0,1}\ ' {0,1} (. *?) \ ' {0,1}\ ' {0,1}\)/';
Preg_match_all ($regex, $data, $result);
foreach ($result [1] as $val) {
if (Preg_match ('/^http.*/', $val)) {$target = $val;}
else if (preg_match ('/^\/.*/', $val)) {$target = $host. $val;}
else {$target = $url. $val;}
echo $target. " <br/>\r\n ";
Preg_match ('/.*\/(. *\.\d+) $/', $val, $name);
if (!is_file ('./img/'. $name [1])) {
Copy ($target, './img/'. $name [1]);
}
}?>
