Re: Removing first word from a string?

Chris, I'll try to explain the basics of a technique I often use: imagine you have 0 or more possible where clauses. start of with an empty array e.g. $whereClauses = array(); now for each clause you need add the relevant subclause as a seperate item to the array (DO NOT include the AND or WHERE string). e.g. if ($foo) { // it up to you to make sure $foo is okay for adding to a query string $whereClauses[] = " foofield='$foo'"; } once you have gone thru all the possible subclauses that could exist do something like this (I'll assume $sql contains the base query): if (count($whereClauses)) { // we have a where statement to make $sql = $sql . ' WHERE ' . join(' AND ', $whereClauses); } I leave it up to your imagination how you apply this idea! greets, Jochem Bastien Koert wrote:

one simple trick is to use a clause that always evaluates correctly. For example, in my site I don't delete data, but flag it with a field (record_deleted) which defaults to 'No' (actually 0) and can be set to 'Yes' (again 1) so that all queries are built with the requirement to use AND ie $sql = "select * from tablename where record_deleted = 0 " //code to delevop additional where paramters goes here if (!empty($_POST['city'])){ $sql .= " AND city like '{$_POST['city']}%' "; }//end if you could also use the same mechanism that PHPMYAdmin does which is to 1 select * from tablename where 1 since one always evaluates to true and does not affect the query, its a simple way of doing the same as above bastien

From: "Chris Payne" <cjp@planetoxygene.com> To: <php-db@lists.php.net> Subject: [PHP-DB] Removing first word from a string? Date: Mon, 3 Jan 2005 21:46:03 -0500 Hi there everyone, I am building a dynamic MySQL query for a project I am working on, but there are instances where it products WHERE AND instead of WHERE city etc ….. due to the nature of the system I am developing. My question is, how can I remove the FIRST “ AND” from a string if it is present, but leave all other AND statements in the string? I would really appreciate any help on this. I can do a find and replace on a string no problem, but just want it to be removed IF it is the FIRST word in the string. Oh and Happy New Year everyone. Chris -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.7 - Release Date: 12/30/2004