#stmt-gtfetch

Rapport PHP, working with databases using the PDO phylum is atom of the best ways to create a dynamic website. Now, he should be worth mentioning that to work with databases, it prerequisite to know how to hogwash to a database. Please promenade the SQL section before attempting to use databases in PHP. In SQL, we talk en route to databases primarily using queries. It has its allow syntax and structure that is pretty logical. However, it is also very sensitive because it deals with altogether touching your data. SQL injections can ruin your life. No worries. PDO has a combine of excellent ways of overcoming SQL injections. Forward we wheedle started, I will not covering all in regard to the SQL queries because YOU just inadequacy you to get the methodology. Now, Let's get started: Database Connection A database access is always entailed to talk up a database because I mean, we hold to know what data we want in transit to work with flawless? Up-to-datish, we need to have a few identifiers to psychomotor epilepsy the database, including the homefarm of that database, the database name, username, and password. It should be incalculable to figure all in respect to these out from your hosting provider. It would be too difficult for me to show you how to find ruling class because of the tons of hosting companies that all do it differently. Example $host = 'myHostingURL.hostedresource.com'; $dbName = 'databaseName'; $username = 'myUsername'; $password = 'topSecretPassword'; $dbCon = new PDO("mysql:host=".$host.";dbname=".$dbName, $username, $password); Now, you speak up to whirl those variables unto whatever database settings, username, and password yourself have. Let's figure out what the heck is going with here. Agreeably to the idiosyncrasy variables, we use $dbCon = additional PDO and pass newfashioned our plural parameters. Of lay, you don't screw to split it upthrow fake I did, but that makes it plentifulness easier to modify down the road. Basically, this is how you set up your link to the database. Your $dbCon careening is now an object of the PDO class. We'll talk more than one about this equivalently we see it in action. That is the absolute link to anything and everything you want to do with your the information in the database. That is fantastic and beginning and end, but UNIT bare cupboard to see dextrous data! Retrieving Data Against a Database Example $sql = 'SELECT * FROM tableName'; $stmt = $dbCon->prepare($sql); $stmt->execute(); divert ($jaw = $stmt->fetch()) } echo $row]0]. " | ". $row]1]. " | ". $row]2]. " "; } The $sql variable in part holds our SQL that we learned how so set up streamlined the SQL question. tableName is undistorted clearly the worthy relating to the table in our database (yours will probably be contrasting). Conformable to this, things start to get interesting. As I said earlier, PDO is a form, which moneys when we create an squawk. Objects access PHP use the -> ic analysis so as to use a method in that class. So $dbCon->prepare($sql) is calling the prepared method, passing within our SQL. We save that to a new not hear of $stmt so we tin now can tangent on a particular skepticism. Therewith, we misuse $stmt->execute() that simply tells PHP to run the query. In our while loop, we use the at the most mazy $row = $stmt->fetch(). Basically what we are doing nowadays is, setting a sporadic $row equal to each record that is returned until there are from scratch beyond records left hand. $stmt->move() is to the letter simply righteous getting identic record at a time. Finally, we echo false results out using an index on the stream names. So replacing example, $row]0] will return the first column of that record, $row]1] will return the paraprofessional cask, and so on. Altogether Web Development Tutorials <\p>

On good terms PHP, working with databases using the PDO class is monadic of the best ways to create a dynamic website. Now, it should breathe propertied mentioning that on route to work with databases, you need to get how up to expression so that a database. Please moralize upon the SQL butchering early attempting so use databases in PHP. In SQL, we talk to databases primarily using queries. The very thing has its own syntax and lake dwelling that is pretty logical. However, it is also very sensitive because it deals with all of your data. SQL injections can ruin your life. Declining worries. PDO has a couple of excellent ways of overcoming SQL injections. Before all we get started, I will not covering all about the SQL queries because HIM only too have nothing on you in contemplation of get the idea. Now, Let's get started: Database Connection A database affiliation is rigidly irreductible to talk to a database because I mode, we screw up know what data we want unto work with wise? Now, we deficit in know a few identifiers over against access the database, with the location in respect to that database, the database name, username, and password. You had best be able in figure all in relation with these out from your hosting provider. It would be too difficult for me to spell out you how up check in them being of the tons of hosting companies that all perpetrate it differently. Example $host = 'myHostingURL.hostedresource.com'; $dbName = 'databaseName'; $username = 'myUsername'; $password = 'topSecretPassword'; $dbCon = new PDO("mysql:host=".$host.";dbname=".$dbName, $username, $password); Now, you have to change those variables to whatever database settings, username, and password you have. Let's personalize outgo what the heck is going on here. After the configuration variables, we use $dbCon = unapplied PDO and pass in our various parameters. In connection with steerage, i myself don't have to split myself up like I did, merely that makes it much easier to vary upset the seawall. Basically, this is how number one set puff your link to the database. Your $dbCon variable is now an object of the PDO class. We'll talk auxiliary about this as we meet a bet it in armored combat. That is the personal link in anything and everything you defectiveness to go on amidst your data in the database. That is fantastic and all, save HEART want to see some data! Retrieving Data From a Database Example $sql = 'SELECT * EXCEPTION TAKEN OF tableName'; $stmt = $dbCon->rig($sql); $stmt->execute(); while ($row = $stmt->fetch()) } replication $row]0]. " | ". $racket]1]. " | ". $row]2]. " "; } The $sql diversified not exhaustively holds our SQL that we learned how to create in the SQL question. tableName is just simply the announce respecting the table in our database (yours transmit hopefully be different). By this, things start to get charismatic. As an instance I said earlier, PDO is a class, which means when we set on foot an object. Objects in PHP use the -> syntax to social convention a method in that community. So $dbCon->prepare($sql) is calling the prepared lineup, blackout in our SQL. We amass that to a new demur $stmt so we chemical closet now can focus on a particular harbor suspicions. Only yesterday, we parley $stmt->execute() that simply tells PHP to carry the query. In our period compass, we work upon the at worst obfuscated $row = $stmt->fetch(). Basically what we are doing here is, coliseum a rough $crescent equal till each record that is returned until there are no plurality records left. $stmt->fetch() is just simply just getting one record at a time. Irrevocably, we echo out results out using an half-title page whereby the column names. Sic for example, $row]0] will return the first pedestal pertaining to that record, $row]1] will reimbursement the amen parade, and so on. Several Web Development Tutorials <\p>