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| Code | ||||||||||
<?PHP /* * tips.php3 * This is a not-so-small script to display random quotes. * The quotes are stored in a MySQL table named "quote" with 3 fields: q_id, q_quote and q_mark. * The program will select ONE RANDOM quote from the database and mark it as read (q_mark = 1), * this will prevent a quote from repeting itself after consecutive page loads. * The script is conceived so special characters and HTML tags can be used inside the quotes. * Configure it by changing host, user, password and database in lines 15 and 16 to match your settings. * If you like it or modify it in any way so that it is more efficient, less lines or add any other feature, * please let me know: Jose Luis <jlpellicer@bigfoot.com> * Have fun! */ // initialize variable that will hold the quote. $quote = ""; // establish connection to the database containing the quotes. $db = mysql_connect("host", "user", "password") or die ("Unable to connect to database."); mysql_select_db("database") or die ("Unable to select database."); // select the quotes that have not been displayed (q_mark = 0). $sql = "SELECT * from quote WHERE q_mark = 0"; $result = mysql_query($sql); // simple error checking if (mysql_errno()>0) { echo "<BR>\n<FONT COLOR=\"#990000\">".mysql_errno().": ".mysql_error()."<BR>\n"; exit; } // put the number of rows found into $max. $max = mysql_num_rows($result)-1; // if we do not find an available quote, then mark them (q_mark) to 0 and select again. if ($max < 0) { $result = mysql_query("UPDATE quote SET q_mark = 0"); if (mysql_errno()>0) { echo "<BR>\n<FONT COLOR=\"#990000\">".mysql_errno().": ".mysql_error()."<BR>\n"; exit; } $sql = "SELECT * from quote WHERE q_mark = 0"; $result = mysql_query($sql); if (mysql_errno()>0) { echo "<BR>\n<FONT COLOR=\"#990000\">".mysql_errno().": ".mysql_error()."<BR>\n"; exit; } $max = mysql_num_rows($result)-1; } // generate a random number between 0 and the number of quotes available. mt_srand((double)microtime()*1000000); if ($max > 0) { $random = mt_rand(0,$max); } else { $random = 0; } // select the random quote and store the text in $quote and it's id in $id. for ($x=0;$x<=$random;$x++) { $myrow = mysql_fetch_array($result); } $id = $myrow[0]; $quote = $myrow[1]; // mark this selected quote as displayed (q_mark = 1). $result = mysql_query("UPDATE quote SET q_mark = 1 WHERE q_id = '$id'"); if (mysql_errno()>0) { echo "<BR>\n<FONT COLOR=\"#990000\">".mysql_errno().": ".mysql_error()."<BR>\n"; exit; } // convert to HTML special characters, you know, like , , , and so on. $quote = nl2br(htmlentities($quote)); // finally replace the "<" and ">" for < and > so you that can use tags. $quote = ereg_replace ("<", "<", $quote); $quote = ereg_replace (">", ">", $quote); echo $quote."<BR>\n"; ?> | ||||||||||
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