[RESOLVED] Read & delete entries in txt file

[KingdomTubes]

Hello, I'm requesting your help here cause I'm really confused.
I'm looking for deleting entries when an image doesn't load on my links test.

I got all my links in a .txt file like this :
links.txt =

<div class="gallery">
 <a href="http://www.website.com/page">
  <img src="http://tc16.easythumbhost.com/image.jpg" onerror="ImgError(this)"/>
 </a>
</div>
#enddiv

the "onerror" code in img src sends an "Image Missing" pic.
What I'd want is to change the "onerror" function to open a php script which deletes all the lines of the div.
This is the script I use to show the links on my page :

 $links = "links.txt";
 $fd = fopen ($links, "r");
 $content = fread ($fd,filesize ($links));
 fclose ($fd);
 $delimiter = "#enddiv";
 $splitcontent = explode($delimiter, $content);
 $output = array_slice($splitcontent, 0,100);

 foreach ( $output as $divs )
{
 echo "$divs";
}

I've searched hours and tried lots of codes before posting
Help would be very appreciated. Thanks.

[Derokorian]

You could use your JS function that shows a missing picture to also send a request to the server with the image information that's missing. Then use the information passed to find and remove the specified image.

[KingdomTubes]

Derokorian;10995402 wrote:

You could use your JS function that shows a missing picture to also send a request to the server with the image information that's missing. Then use the information passed to find and remove the specified image.

Well what I want to do is to completely remove the div which contains the image link, not just the image link.
Something like this :
onerror = remove current "$divs" from the txt file

[Derokorian]

I understand but onerror is client side, in order to delete something server-side when a client side trigger is run is to have it send a request back to the server with the necessary information to find the said div in the text file and then delete it.

For example you could add the following into your JS function that runs onerror

function ImgError(data) {
  xmlhttp.open("POST","http://www.example.com/missing_image.php",false);
  xmlhttp.send('src='+data.src);
  data.src = 'http://www.example.com/missing_image.jpg";
}

Then in missing_image.php:

$src = isset($_POST['src']) ? $_POST['src'] : NULL;
if( is_null($src) ) exit;

$file = file_get_contents('divs.txt');

$pattern = '/<div[^>]+>\s<a[^>]+>\s<img src="'.preg_quote($src,'/').'"[^>]+>\s</a>\s</div>/';

if( preg_match($pattern,$file,$match) ) {
   $newfile = str_replace($match[0],'',$file);
   file_put_contents('divs.txt',$newfile);
}

Or something along those lines. Note that my regex pattern is untested and made in the quick reply window and may require tweaking to get it to work (or completely remade)

[KingdomTubes]

I can't get it to work.. It doesn't even show the missing image.jpg 🙁

[Derokorian]

Maybe you could post what you have tried. Can't tell you what's wrong if you don't show ANY code at all.....

[KingdomTubes]

I tried exactly what you suggested me with function ImgError(data) but it doesn't load missing image.
this is what I had

function ImgError(source) {
	source.src = "../../images/brokenlink.jpg";
	source.onerror = "";
	return true;
}

This code is showing me the broken link picture. I tried with your suggestion

function ImgError(data) {
  xmlhttp.open("POST","missing_image.php",false);
  xmlhttp.send('src='+data.src);
  data.src = "../../images/brokenlink.jpg";
}

it doesn't show the broken link picture.
The missing_image.php doesn't load either as I can see.
am I doing something wrong?
Sorry my english may be a bit bad 😉

[KingdomTubes]

After some research, I think I had to call a var for xmlhttp so I did it :

xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 

Now the picture shows up, but nothing else happens. How can I know if it loads the .php?

I'm a still learning a lot in those languages, forgive my incompetence.

[Derokorian]

Ok well I don't have a missing image so I used the google logo to replace a missing image. This is what I came up with:

<html>
    <head>
        <script>
        function imgError(data) {
        var xmlhttp;
        if (window.XMLHttpRequest)
            {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp=new XMLHttpRequest();
            }
        else
            {// code for IE6, IE5
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
        xmlhttp.onreadystatechange=function()
            {
            if (xmlhttp.readyState==4 && xmlhttp.status==200)
                {
                document.getElementById('responseDiv').innerHTML=xmlhttp.responseText;
                }
            else
                {
                document.getElementByID('responseDiv').innerHTML='<b>Failed to remove missing image';
                }
            }
        xmlhttp.open('GET','missing_image.php?src='+data.src,true);
        xmlhttp.send();

    data.src = "http://www.figleaf.com/Company/images/google-logo.jpg";
    data.onerror = "";
    return true;
    }
    </script>
    <style>
    img {
        width: 100px;
    }
    </style>
</head>
<body>
    <div id="responseDiv"></div>
    <div class="gallery">
        <a href="http://www.website.com/page">
         <img src="http://www.forgetthebox.net/wp-content/uploads/2011/04/Random-Funny-Photos-Part-133_5411.jpg" onerror="imgError(this)"/>
        </a>
    </div>
    <div class="gallery">
        <a href="http://www.website.com/page">
         <img src="http://www.hpl.hp.com/research/info_theory/AlbertWeb/fullsize/B)&#37;20Corrupted%20by%20random%20noise,%20bit%20error%20rate%3D0.020.gif" onerror="imgError(this)"/>
        </a>
    </div>
    <div class="gallery">
        <a href="http://www.website.com/page">
         <img src="http://tc16.easythumbhost.com/image.jpg" onerror="imgError(this)"/>
        </a>
    </div>
</body>
</html>

<?php

$src = isset($_GET['src']) ? $_GET['src'] : NULL;
if( is_null($src) ) exit;

$file = file_get_contents('divs.txt'); 

$pattern = '/<div[^>]+>\s*<a[^>]+>\s*<img[^>]+src=["\']'.preg_quote($src,'/').'["\'][^>]+>\s*<\/a>\s*<\/div>/';

if( preg_match($pattern,$file,$match) ) { 
   $newfile = str_replace($match[0],'',$file); 
   file_put_contents('divs.txt',$newfile);
   echo 'Removed a missing image';
} else {
    echo 'Failed to remove a missing image';
}

Hope that helps. It's working for me and gives back the response.

[Derokorian]

Of course it may be a good idea to move the matches to a removed_divs.txt that way if they were erroneously removed you can put them back??

[KingdomTubes]

Wow this works fine! It works only once but if I copy it in another directory and tries again it's ok. Took me a while to understand but it's ok 🙂
Is there a place where I could see how to manage patterns? cause my real div pattern looks like this and needs to remove it all (including #enddiv)

<div class="gallery">
 <a href="http://www.website.com/page" title="the title" target="_blank">
  <img src="http://tc16.easythumbhost.com/image.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
 </a>
 <span class="descr">
  <a href="http://www.website.com/page" title="the title" target="_blank">
   The Title
 </a>
 </span>
 <span class="length">
  1:30
 </span>
</div>
#enddiv

Bye the way, thank you soooo much it is very appreciated you saved me hours and hours of work!!! Is there a way I could send you my appreciation? 🙂

[Derokorian]

Try this for the pattern:

$pattern = '/<div[^>]+>\s*<a[^>]+>\s*<img[^>]+src=["\']'.preg_quote($src,'/').'["\'][^>]+>\s*<\/a>.*?<\/div>/s';

Works with the sample data in your last post. I used this for my original divs.txt:

<div class="gallery">
<a href="http://www.website.com/page" title="the title" target="blank">
<img src="http://tc16.easythumbhost.com/image1.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
</a>
<span class="descr">
<a href="http://www.website.com/page" title="the title" target="blank">
The Title
</a>
</span>
<span class="length">
1:30
</span>
</div>
#enddiv
<div class="gallery">
<a href="http://www.website.com/page" title="the title" target="blank">
<img src="http://tc16.easythumbhost.com/image.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
</a>
<span class="descr">
<a href="http://www.website.com/page" title="the title" target="blank">
The Title
</a>
</span>
<span class="length">
1:30
</span>
</div>
#enddiv
<div class="gallery">
<a href="http://www.website.com/page" title="the title" target="blank">
<img src="http://tc16.easythumbhost.com/imagea.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
</a>
<span class="descr">
<a href="http://www.website.com/page" title="the title" target="blank">
The Title
</a>
</span>
<span class="length">
1:30
</span>
</div>
#enddiv

And got this after running the original html I showed you previously:

<div class="gallery">
<a href="http://www.website.com/page" title="the title" target="blank">
<img src="http://tc16.easythumbhost.com/image1.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
</a>
<span class="descr">
<a href="http://www.website.com/page" title="the title" target="blank">
The Title
</a>
</span>
<span class="length">
1:30
</span>
</div>
#enddiv

#enddiv
<div class="gallery">
<a href="http://www.website.com/page" title="the title" target="blank">
<img src="http://tc16.easythumbhost.com/imagea.jpg" width="180" height="135" alt="alt" onerror="ImgError(this)"/>
</a>
<span class="descr">
<a href="http://www.website.com/page" title="the title" target="blank">
The Title
</a>
</span>
<span class="length">
1:30
</span>
</div>
#enddiv

As you can see it only removed the one and all of it. Hope that helps!

PS. If you really want to show your appreciation I do accept donations ;-) PM if you want (but it really is unnecessary, its a puzzle and I like figuring out new things I haven't done before)

[Derokorian]

Oops I missed the part where it has to remove the #enddiv part.... Just a sec

$pattern = '/<div[^>]+>\s*<a[^>]+>\s*<img[^>]+src=["\']'.preg_quote($src,'/').'["\'][^>]+>\s*<\/a>.*?#enddiv/s';

[Derokorian]

If you want to understand the pattern better have a look at this:

$pattern = '/'              #Opening Delimiter
            .'<div[^>]+>'   #Opening DIV tag
            .'\s*'          #Any white space
            .'<a[^>]+>'     #Opening anchor tag
            .'\s*'          #Any white space
            .'<img[^>]+'    #Beginning of IMG tag
            .'src=["\']'    #Beginning of SRC attribute for IMG tag
            .preg_quote($src,'/')   #prepared SRC that we're looking for
            .'["\']'        #End of the SRC attribute for IMG tag
            .'[^>]+>'       #End of the IMG tag
            .'.*?'          #Any characters until the next matching pattern
            .'#enddiv'      #Matches #enddiv tag
            .'/'            #Closing delmiter
            .'s';           #Single-line mode flag, allows . to match new line characters

[KingdomTubes]

I get this error : Parse error: syntax error, unexpected T_IF in C:\Program Files (x86)\EasyPHP-5.3.8.1\www\Links Check\images\missing_link.php on line 10

After many tries, I figured out that it works very well in firefox (I was on IE🙂 )
Everything is fine!! You're a great helper 😃
you made someone happy 🙂

[Derokorian]

KingdomTubes wrote:

I get this error : Parse error: syntax error, unexpected T_IF in C:\Program Files (x86)\EasyPHP-5.3.8.1\www\Links Check\images\missing_link.php on line 10

Probably missing a semi-colon from the previous line of code.

[KingdomTubes]

semi-colon is there
Anyway I'll work it with firefox, no error anymore 🙂
I'd have another problem with the script, but I can endure by doing the things manually after.
My txt files are composed of over 2500 images links and some of them has over 100 errorneous images. Files are around 1600Kb. When it saves back to the .txt file, some links get cuts at the end of the document, so I have to copy back what was in the original one. I tried a setTimeout of 10 seconds in the "body onload", also tried a time_nanosleep(0,15000000); between each picture appearance, but problem persists.
If you got a quick solution for this I'd be happy, else I'm already happy anyway 🙂

[bradgrafelman]

Why aren't you using a DBMS (such as MySQL) for this?

[KingdomTubes]

bradgrafelman;10995485 wrote:

Why aren't you using a DBMS (such as MySQL) for this?

Would it be easier with it?
(I never touched this language)