URL shortened short URL program

This is an online code, no database, a shortened URL exists in a TXT file in the same directory. Demo: http://www.ucmbaa.org/u/ The goal is to shorten the Web site, the second is not to allow search engines to identify this address. /* Location of the file to store URLS */ $file = ' urls.txt '; /* Use mod_rewrite:0-No or 1-yes */ $use _rewrite = 1; /* Language/style/output variables */ $l _url= ' url '; $l _nourl= ' did not enter a URL address '; $l _yoururl= ' your short URL:'; $l _invalidurl= ' invalid URL.'; $l _createurl= ' generate short URLs '; NO need to EDIT BELOW//////////////////// if (!is_writable ($file) | |!is_readable ($file)) { Die (' cannot write or read from file. Please CHMOD the URL of file (urls.txt) by default to 777 and make sure it is uploaded. '); } $action = Trim ($_get[' id '); $action = (Empty ($action) | | $action = = ")? ' Create ': ' redirect '; $valid = "^ (https?| FTP) \:\/\/([a-z0-9+!* (),;? &=\$_.-]+ (\:[a-z0-9+!* (),;? &=\$_.-]+)? @)? [A-z0-9+\$_-]+ (\.[ a-z0-9+\$_-]+) * (\:[0-9]{2,5})? (\ \ [a-z0-9+\$_-]\.?) +)*\/? (\? [a-z+&\$_.-] [a-z0-9;:@/&%=+\$_.-]*]? (#[a-z_.-][a-z0-9+\$_.-]*)? \$ "; $output = "; if ($action = = ' Create ') { if (Isset ($_post[' create ')) { $url = Trim ($_post[' url '); if ($url = = ") { $output = $l _nourl; } Else { if (eregi ($valid, $url)) { $fp = fopen ($file, ' a '); Fwrite ($fp, "{$url}\r\n"); Fclose ($FP); $id = count (file ($file)); $dir = dirname ($_server[' php_self '); $filename = explode ('/', $_server[' php_self '); $filename = $filename [(Count ($filename)-1)]; $shorturl = ($use _rewrite = = 1)? "Http://{$_server[' Http_host ']}{$dir} {$id}": "Http://{$_server[' Http_host ']}{$dir} {$filename}?id={$id}"; $output = "{$l _yoururl} {$shorturl}"; } Else { $output = $l _invalidurl; } } } } if ($action = = ' redirect ') { $urls = file ($file); $id = Trim ($_get[' id ')-1; if (Isset ($urls [$id])) { Header ("Location: {$urls [$id]}"); Exit } Else { Die (' Script error '); } } Feel free to EDIT BELOW//////////////////// ?> The short URL service can help you shorten a long URL, so it's easy to share links on social networks and Weibo. Ob_end_flush (); ?> Copy Code

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