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PORegex not returning any matches independent of expression used
 

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  1. PORegex not returning any matches independent of expression used
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    <p>Ok here is the issue, I have been trying to build cURL script to check for dead links in a database. The links all look something like this <code>http://www.ltblekinge.se/download/18.9c16a31109c04a3e880003750</code>. The issue that I have is that no mater what regex "pattern" I use the <code>$url_list</code> remains empty. Any help would be appreciated!</p> <p><strong>Problematic part of Code</strong></p> <pre><code>&lt;?php /*Config*/ /*** mysql hostname ***/ $hostname = 'localhost'; /*** mysql username ***/ $username = 'root'; /*** mysql password ***/ $password = 'root'; /*curl setup of varibles*/ $excluded_domains = array( 'localhost', 'rollnstroll.se'); $max_connections = 10; $url_list = array(); $working_urls = array(); $dead_urls = array(); $not_found_urls = array(); $active = null; try { $dbh = new PDO("mysql:host=$hostname;dbname=blankett", $username, $password); $dbh-&gt;exec('SET CHARACTER SET utf8'); $dbh-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); /*** fetch into an PDOStatement object ***/ $sql = "SELECT * FROM `forms2`"; $stmt = $dbh-&gt;prepare("SELECT * FROM forms2"); $stmt-&gt;execute(); while ($d = $stmt-&gt;fetchAll()) { if (preg_match_all('/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&amp;=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&amp;=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&amp;;%@.\w_]*)#?(?:[.\!\/\\w]*))?)/', $d['link_forms'], $matches)) { /***error code***/ if (preg_last_error() == PREG_NO_ERROR) { print 'There is no error.'; } else if (preg_last_error() == PREG_INTERNAL_ERROR) { print 'There is an internal error!'; } else if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) { print 'Backtrack limit was exhausted!'; } else if (preg_last_error() == PREG_RECURSION_LIMIT_ERROR) { print 'Recursion limit was exhausted!'; } else if (preg_last_error() == PREG_BAD_UTF8_ERROR) { print 'Bad UTF8 error!'; } else if (preg_last_error() == PREG_BAD_UTF8_ERROR) { print 'Bad UTF8 offset error!'; } foreach ($matches[1] as $url) { // exclude some domains $tmp = parse_url($url); if (in_array($tmp['host'], $excluded_domains)) { continue; } // store the url $url_list []= $url; } } } // remove duplicates $url_list = array_values(array_unique($url_list)); if (!$url_list) { die('No URL to check'); } } catch(PDOException $e) { echo $e-&gt;getMessage(); } </code></pre> <p><strong>DB Structure</strong></p> <pre><code>1 id int(10) No None AUTO_INCREMENT 2 master_id int(10) No None 3 name_form varchar(500) latin1_swedish_ci No None 4 link_form varchar(500) latin1_swedish_ci No None 5 date_added timestamp No CURRENT_TIMESTAMP </code></pre> <p><strong>Question</strong> Why is <code>$url_list</code>emtpy?</p>
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    1. PO
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COvar_dump($matches[1]) == ?
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    2. COalso - unless you're 100% about that regexp, try preg_last_error() http://www.php.net/manual/en/function.preg-last-error.php
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      1. PORegex not returning any matches independent of expression used
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    3. COfound the regexp at http://blog.mattheworiordan.com/post/13174566389/url-regular-expression-for-links-with-or-without-the
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