facine · October 8, 2013 11:18 · Sep 13, 2013
diff --git a/magic.php b/magic.php
@@ -0,0 +1,196 @@
+<?php
+
+/**
+ * A base class with getters and setters incorporated.
+ */
+class ObjectBase {
+  /**
+   * Setter function for a generic attribute.
+   *
+   * @param string $property_name
+   *   Name of the attribute to set.
+   * @param mixed $value
+   *   The value to set.
+   */
+  public function set($attribute_name, $value) {
+    $this->{$attribute_name} = $value;
+  }
+
+  /**
+   * Getter for a generic attribute.
+   *
+   * @param string $attribute_name
+   *   The name of the attribute to get.
+   * @return mixed
+   *   The value of the attribute.
+   */
+  public function get($attribute_name) {
+    return $this->{$attribute_name};
+  }
+
+  /**
+   * Get a dash based attribute name based on a camel cased name.
+   *
+   * @param string $camel
+   *   The camel case name.
+   * @return string
+   *   The dash separated name.
+   */
+  private function getAttribute($camel) {
+    // Make the first letter lower case.
+    $camel[0] = strtolower($camel[0]);
+    // Insert a dash in front of every uppercase character.
+    $attribute = preg_replace('/([A-Z0-9])/', "_$1", $camel);
+    // Make everything lower case.
+    return strtolower($attribute);
+  }
+
+  /**
+   * Implement the magic __call method to cath calls to undefined methods.
+   */
+  function __call($method, $args) {
+    // Detect if it's a getter
+    if (strpos($method, 'get') === 0 && count($args) == 0) {
+      $attribute_name = $this->getAttribute(substr($method, 3));
+      return $this->get($attribute_name);
+    }
+    elseif (strpos($method, 'set') === 0 && count($args) == 1) {
+      $attribute_name = $this->getAttribute(substr($method, 3));
+      $this->set($attribute_name, $args[0]);
+    }
+    else {
+      // Raise an error because we don't know the method.
+      throw new ErrorException("Undefined method: $method");
+    }
+  }
+}
+
+/**
+ * Bank account dummy class to demonstrate the use of the ObjectBase class.
+ */
+class BankAccount extends ObjectBase {
+  /**
+   * Balance for this account.
+   */
+  protected $balance;
+  /**
+   * Number of credit cards registered to this account.
+   */
+  protected $credit_cards;
+  /**
+   * Number of transactions to display.
+   */
+  public $transactions;
+
+  function __construct() {
+    $this->balance = 0;
+    $this->transactions = 0;
+    $this->credit_cards = 0;
+  }
+}
+
+$account = new BankAccount();
+// Set some values.
+$account->setBalance(1000);
+$account->setCreditCards(2);
+$account->setTransactions(25);
+// Get some values.
+print "Balance     : " . $account->getBalance() . "\n";
+print "Transactions: " . $account->getTransactions() . "\n";
+print "Credit Cards: " . $account->getCreditCards() . "\n";
+
+/**************************************/
+// Simple inheritance? No problem, do it with traits!
+trait ObjectTrait {
+  /**
+   * Setter function for a generic attribute.
+   *
+   * @param string $property_name
+   *   Name of the attribute to set.
+   * @param mixed $value
+   *   The value to set.
+   */
+  public function set($attribute_name, $value) {
+    $this->{$attribute_name} = $value;
+  }
+
+  /**
+   * Getter for a generic attribute.
+   *
+   * @param string $attribute_name
+   *   The name of the attribute to get.
+   * @return mixed
+   *   The value of the attribute.
+   */
+  public function get($attribute_name) {
+    return $this->{$attribute_name};
+  }
+
+  /**
+   * Get a dash based attribute name based on a camel cased name.
+   *
+   * @param string $camel
+   *   The camel case name.
+   * @return string
+   *   The dash separated name.
+   */
+  private function getAttribute($camel) {
+    // Make the first letter lower case.
+    $camel[0] = strtolower($camel[0]);
+    // Insert a dash in front of every uppercase character.
+    $attribute = preg_replace('/([A-Z0-9])/', "_$1", $camel);
+    // Make everything lower case.
+    return strtolower($attribute);
+  }
+
+  /**
+   * Implement the magic __call method to cath calls to undefined methods.
+   */
+  function __call($method, $args) {
+    // Detect if it's a getter
+    if (strpos($method, 'get') === 0 && count($args) == 0) {
+      $attribute_name = $this->getAttribute(substr($method, 3));
+      return $this->get($attribute_name);
+    }
+    elseif (strpos($method, 'set') === 0 && count($args) == 1) {
+      $attribute_name = $this->getAttribute(substr($method, 3));
+      $this->set($attribute_name, $args[0]);
+    }
+    else {
+      // Raise an error because we don't know the method.
+      throw new ErrorException("Undefined method: $method");
+    }
+  }
+}
+
+class BankAccountTraits {
+  use ObjectTrait;
+  /**
+   * Balance for this account.
+   */
+  protected $balance;
+  /**
+   * Number of credit cards registered to this account.
+   */
+  protected $credit_cards;
+  /**
+   * Number of transactions to display.
+   */
+  public $transactions;
+
+  function __construct() {
+    $this->balance = 0;
+    $this->transactions = 0;
+    $this->credit_cards = 0;
+  }
+}
+
+$account = new BankAccountTraits();
+// Set some values.
+$account->setBalance(1000);
+$account->setCreditCards(2);
+$account->setTransactions(25);
+// Get some values.
+print "Balance     : " . $account->getBalance() . "\n";
+print "Transactions: " . $account->getTransactions() . "\n";
+print "Credit Cards: " . $account->getCreditCards() . "\n";
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