New array class to deal with memory issues.

Author: nigelgbanks

PackedArray.inc

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @file
+ *
+ * Provides a 'packed' array for occasions when PHP array consumes to much memory. Not that this class
+ * is about twice as slow as PHP arrays, but around three times as compressed. It should only be used when dealing with large arrays where 
+ * processing speed isn't as much of a concern as memory usage.
+ * 
+ */
+class PackedArray implements ArrayAccess, Serializable {
+
+  protected $array = array();
+
+  public function __construct() {
+    $args = func_get_args();
+    foreach ($args as $k => $v) {
+      $this->offsetSet($k, $v);
+    }
+  }
+
+  public function offsetExists($offset) {
+    return isset($this->array[$offset]);
+  }
+
+  public function offsetGet($offset) {
+    if ($this->offsetExists($offset)) {
+      return unserialize($this->array[$offset]);
+    }
+    return NULL;
+  }
+
+  public function offsetSet($offset, $val) {
+    if (isset($offset)) {
+      $this->array[$offset] = serialize($val);
+    }
+    else {
+      $this->array[] = serialize($val);
+    }
+  }
+
+  public function offsetUnset($offset) {
+    unset($this->array[$offset]);
+  }
+
+  public function serialize() {
+    return serialize($this->array);
+  }
+
+  public function unserialize($serialized) {
+    $this->array = unserialize($serialized);
+  }
+
+}