barcode generator source code in vb.net About the Plug-in in Java

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About the Plug-in
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This plug-in accepts a URL to be shortened, along with some other data, and returns a short URL It takes these arguments: $url The URL to be shortened $redirect The name of a php file on your server that will make the redirects from short URLs to their original destinations
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$len The number of characters to use in the token part of a short URL The more you use, the more URLs are supported For example, three characters will support 4,096 URLs since this plug-in uses the hexadecimal digits 0 9 and a f $file The name of a file in which to store the short URL data
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$contents $lines $shorts $longs $line $j $str String variable containing the contents of $file Array containing all the separate lines from $contents Array of short token versions of $longs Array of full URL versions of $shorts String containing a single line extracted from $lines Integer counter for iterating through $longs String containing a newly created short token
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How It Works
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This plug-in reads the contents of $file into the variable $contents, from where all the individual lines are extracted into the array $lines Then two arrays ($shorts and $longs) are initialized to hold the short tokens and their long URL equivalents, as extracted from $lines Then, if $contents actually contains anything in other words, there was data in $file and it was successfully loaded an if statement is entered In this case, a foreach loop iterates through all the lines in $lines and assigns the left and right items of data on either side of the | symbol, which divides them into the $shorts and $longs arrays The function list() is used to neatly extract both halves at once When complete, for example, $shorts[1] will contain a token that represents the URL in $longs[1] Next the in_array() function is called to see whether $url already exists in the datafile If so, the $longs array, which contains the list of URLs, is stepped through, incrementing the pointer $j until the matching URL is found, at which point $j is used to index into $shorts and extract the equivalent token from there This token is then returned, along with some other details, as follows: The variable $redirect is passed to the function and represents the name of a PHP program you will use to handle the short URL redirects Suppose this is called gophp Therefore, when the function returns it will pass back the string gophp u=nnnn, where nnnn is the short token equivalent to the URL in $url If $url is not already in the datafile, a do loop is entered to randomly construct a new token $len characters in length, which is stored in $str The loop repeats until the value of $str is unique to the datafile, so that no two URLs can have the same short token With a short token now created in $str, the file_put_contents() function is called to save the new details into the datafile It does this by saving $contents (the data previously read from the file), followed by $str, a | symbol, and $url It is terminated with a \n (newline character) So an example line from this file would look like this:
f8c52|http://pluginphpcom/longfoldername/indexhtml
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Finally a redirect URL is returned comprising the values of $redirect, u=, and $str, such as gophp u=xxxx
How to Use It
To create a short URL, use this plug-in The following one, plug-in 45, is for using the short URLs you create To create a short URL, you need to pass four arguments to the function, like this:
$long $redirect $len $file $result = = = = = "http://pluginphpcom/longfoldername/indexhtml"; "gophp"; 5; "shorturlstxt"; PIPHP_CreateShortURL($long, $redirect, $len, $file);
Now you can display the link to this shortened URL using code such as this:
echo " http://mysitecom/$result";
In the preceding case, this will display a link looking like the following:
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