Apparently isn’t any node.index property built-in, so here’s how to find it, in case I need it again:
Source: StackOverflow
Note to self: For generating proper, working favicons from an SVG (or other image)… RealFaviconGenerator ðŸ‘
Making a website, and using ajax for some things. Sometimes things fail and return custom error pages. I made them to be helpful, but since you can only see them in the browser developer console, they were a bit of a hassle to look at.
To see what the error was much easier, I figured I could just parse the returned HTML, extract the message I knew was there, and insert it into the page that way.
And you’d think the following would work fine:
But… No… Apparently, since the response was a complete HTML page, i.e. including html, head and body tags, jQuery was getting a bit tricked up when trying to parse it. Actually not sure if it’s jQuery or native browser parsing behind that’s causing it, but where there’s a will, there’s a way:
¯\_(ツ)_/¯
Well, step one to solve this is of course to find all the images on a page, and that is what I will present in this post. It will be sort of like a backend service we can use later from an AJAX call. You post it a URL, and you get all the image URLs it found back. Let’s put the petal to medal!
Continue reading PHP: How to get all images from an HTML page
I’m currently writing a post on how to get image tags from a remote HTML page using PHP. One sticky issue with that is that the image URLs you find is a joyful mix of absolute and relative URLs.
Luckily, I found a function on nashruddin.com which seem to handle them alright. After a bit of clean up and fixing an error, we have this function:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | <?php function make_absolute($url, $base) { // Return base if no url if( ! $url) return $base; // Return if already absolute URL if(parse_url($url, PHP_URL_SCHEME) != '') return $url; // Urls only containing query or anchor if($url[0] == '#' || $url[0] == '?') return $base.$url; // Parse base URL and convert to local variables: $scheme, $host, $path extract(parse_url($base)); // If no path, use / if( ! isset($path)) $path = '/'; // Remove non-directory element from path $path = preg_replace('#/[^/]*$#', '', $path); // Destroy path if relative url points to root if($url[0] == '/') $path = ''; // Dirty absolute URL $abs = "$host$path/$url"; // Replace '//' or '/./' or '/foo/../' with '/' $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'); for($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {} // Absolute URL is ready! return $scheme.'://'.$abs; } |
I can sort of read through and see what it does, but I can’t explain it very well. So, I’ll just leave it at that. So far it has worked fine for me. Maybe some corner cases that are missing, and if there are, please let me know!
💡 What I added to the original function was line 5 and 17. The first to prevent it from crashing if the url is null or empty, and the second to prevent it from crashing if parse_url finds no path. For example if the url is http://www.example.com (No /whatever at the end).
A tag that is easy to forget about is the base tag. The above function gets the base path from the URL given as base. For example if you gave it http://www.example.com/directory/file.html as base, it would use http://www.example.com/directory/. However, if file.html included the following base tag:
Then the base path would be http://www.example.com/ instead. Fun, eh?
As long as you know about it, it’s not to hard to deal with though. You just need to get a hold of it and provide that as base instead when using the function above.
Works On My Machineâ„¢! And if it doesn’t on yours, let me know. If it’s a mistake in the function, I’d like to fix it!
Needed to add a hover effect on some table rows and wanted to make it look nice. Think I managed to get it quite smooth in the end and thought I could share it.
Outdated: I wrote this in 2010. These days you should almost most definitely use CSS transitions instead 🙂