Connect to db
try { $user = "root"; $pass = "pass"; $dbh = new PDO('mysql:host=localhost;dbname=db', $user, $pass); } catch (PDOException $e) { print "Error!: " . $e->getMessage() . "<br/>"; die(); };
SELECT
$stmt = $dbh->prepare(" SELECT count(*) FROM `tb` WHERE name = :i "); $stmt->execute(array("i"=>"$v")); //Value exists? $number_of_rows = $stmt->fetchColumn(); if ($number_of_rows == 0) { echo "Value does not exist "; }else{ echo "Value exists"; };
SELECT2
$q = $dbh->prepare("SELECT * tb WHERE name = :i"); $q->bindValue(':i', 'something'); $q->execute(); if ($q->rowCount() > 0){ $check = $q->fetch(PDO::FETCH_ASSOC); $row_id = $check['id']; echo $row_id; // do something } //or $q = $db->prepare("SELECT id FROM table WHERE forename = :forename and surname = :surname LIMIT 1"); $q->bindValue(':forename', 'Joe'); $q->bindValue(':surname', 'Bloggs'); $q->execute(); if ($q->rowCount() > 0){ $check = $q->fetch(PDO::FETCH_ASSOC); $row_id = $check['id']; // do something }
UPDATA
$sql = 'update tb set set_column =:set_name where where_column = :where_value'; $stmt = $dbh -> prepare($sql); $stmt->bindParam(':set_name', $update_set_name, PDO::PARAM_STR); $stmt->bindParam(':where_value', $update_where_value, PDO::PARAM_STR); $stmt->execute();
INSERT
$stmt = $dbh -> prepare("INSERT INTO tb (column_one, column_tow) VALUES(:value_one, :value_tow)"); $stmt->bindParam(':value_one', $value_one, PDO::PARAM_STR); $stmt->bindParam(':value_tow', $value_tow, PDO::PARAM_STR); $stmt->execute();