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POImprove my function: generate SEO friendly title
 

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  1. POImprove my function: generate SEO friendly title
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    <p>I am using this function to generate SEO friendly titles, but I think it can be improved, anyone want to try? It does a few things: cleans common accented letters, check against a "forbidden" array, and check optionally against a database of titles in use.</p> <pre><code> /** * Recursive function that generates a unique "this-is-the-title123" string for use in URL. * Checks optionally against $table and $field and the array $forbidden to make sure it's unique. * Usage: the resulting string should be saved in the db with the object. */ function seo_titleinurl_generate($title, $forbidden = FALSE, $table = FALSE, $field = FALSE) { ## 1. parse $title $title = clean($title, "oneline"); // remove tags and such $title = ereg_replace(" ", "-", $title); // replace spaces by "-" $title = ereg_replace("á", "a", $title); // replace special chars $title = ereg_replace("í", "i", $title); // replace special chars $title = ereg_replace("ó", "o", $title); // replace special chars $title = ereg_replace("ú", "u", $title); // replace special chars $title = ereg_replace("ñ", "n", $title); // replace special chars $title = ereg_replace("Ñ", "n", $title); // replace special chars $title = strtolower(trim($title)); // lowercase $title = preg_replace("/([^a-zA-Z0-9_-])/",'',$title); // only keep standard latin letters and numbers, hyphens and dashes ## 2. check against db (optional) if ($table AND $field) { $sql = "SELECT * FROM $table WHERE $field = '" . addslashes($title) . "'"; $res = mysql_debug_query($sql); if (mysql_num_rows($res) &gt; 0) { // already taken. So recursively adjust $title and try again. $title = append_increasing_number($title); $title = seo_titleinurl_generate($title, $forbidden, $table, $field); } } ## 3. check against $forbidden array if ($forbidden) { while (list ($key, $val) = each($forbidden)) { // $val is the forbidden string if ($title == $val) { $title = append_increasing_number($title); $title = seo_titleinurl_generate($title, $forbidden, $table, $field); } } } return $title; } /** * Function that appends an increasing number to a string, for example "peter" becomes "peter1" and "peter129" becomes "peter130". * (To improve, this function could be made recursive to deal with numbers over 99999.) */ function append_increasing_number($title) { ##. 1. Find number at end of string. $last1 = substr($title, strlen($title)-1, 1); $last2 = substr($title, strlen($title)-2, 2); $last3 = substr($title, strlen($title)-3, 3); $last4 = substr($title, strlen($title)-4, 4); $last5 = substr($title, strlen($title)-5, 5); // up to 5 numbers (ie. 99999) if (is_numeric($last5)) { $last5++; // +1 $title = substr($title, 0, strlen($title)-5) . $last5; } elseif (is_numeric($last4)) { $last4++; // +1 $title = substr($title, 0, strlen($title)-4) . $last4; } elseif (is_numeric($last3)) { $last3++; // +1 $title = substr($title, 0, strlen($title)-3) . $last3; } elseif (is_numeric($last2)) { $last2++; // +1 $title = substr($title, 0, strlen($title)-2) . $last2; } elseif (is_numeric($last1)) { $last1++; // +1 $title = substr($title, 0, strlen($title)-1) . $last1; } else { $title = $title . "1"; // append '1' } return $title; } </code></pre>
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    1. COWhat are you basing your assumptions here on? Why are spaces in titles not "SEO friendly"? What is the purpose of using sequential numbers to differentiate the titles?
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