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POHow can I add a : to the beginning of the first array key when the first array key is unknown?
 

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  1. POHow can I add a : to the beginning of the first array key when the first array key is unknown?
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    <p>I'm trying to dynamically add class properties into an PDO prepared statement. To achieve this I need to create an array that will grab the properties from the class, put them in an array, and add a : to the beginning of each key. Then, separate each key with a comma. The closest I've gotten to achieve this is using:</p> <pre><code>foreach ($property as $field) $propertyValues = implode(", :", array_keys($property)); return $propertyValues; } </code></pre> <p>which gives me<br> username, :password</p> <p>I just need a way to add a : to the first key which in this case is username. So it would look like</p> <p>:username, :password</p> <p>Keep in mind, however, that I'm trying to make this dynamic so that I can extend its functionality to other classes, and I'm not always going to know what the first array key is.</p> <p>If your interested in reading the entire class, here it is:</p> <pre><code>&lt;?php require_once("../config/main.php"); class Database{ protected static $dbFields = array('username', 'password'); public $dbConnection; public $tableName = 'users'; public $id; public $username; public $password; public function __construct() { $this-&gt;connect(); } public function connect(){ try { $this-&gt;dbConnection = new PDO("mysql:host=".DB_SERVER."; dbname=".DB_NAME, DB_USER, DB_PASS); } catch (PDOException $e) { echo 'Connection failed: ' . $e-&gt;getMessage(); } } public function properties() { $properties = array(); foreach (self::$dbFields as $field) { if (isset($this-&gt;field) || property_exists($this, $field)) { $properties[$field] = $this-&gt;$field; } } return $properties; } public function property_values() { $property = $this-&gt;properties(); $propertyValues = implode(", :", array_keys($property)); return $propertyValues; } public function insert(){ // this is where all the is going to happen. it's a work in progress // $sql = "INSERT INTO". $this-&gt;tableName. " ("; // $sql .= implode(", ",array_keys($this-&gt;properties())); // $sql .= ")VALUES(". ; // $q = $this-&gt;db-&gt;prepare($sql); // $q-&gt;execute(array('John', 'hula')); } } $database = new Database(); $vals = $database-&gt;property_values(); print_r($vals); ?&gt; </code></pre>
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