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16 years ago
WHOA... KEEP IT SIMPLE!

In regards to secure_admin's note: You've used OOP to simplify PHP's ability to create and use object references. Now use PHP's static keyword to simplify your OOP.

<?php

class DataModelControl {
  protected static $data = 256; // default value; 
  protected $name;

  public function __construct($dmcName) {
    $this->name = $dmcName;
  }

  public static function setData($dmcData) {
    if(is_numeric($dmcData)) {
      self::$data = $dmcData;
    }
  }

  public function __toString() {
    return "DataModelControl [name=$this->name, data=" . self::$data . "]";
  }   
}

# create several instances of DataModelControl...
$dmc1 = new DataModelControl('dmc1');
$dmc2 = new DataModelControl('dmc2');
$dmc3 = new DataModelControl('dmc3');
echo $dmc1 . '<br>';
echo $dmc2 . '<br>';
echo $dmc3 . '<br><br>';

# To change data, use any DataModelControl object...
$dmc2->setData(512);
# Or, call setData() directly from the class...
DataModelControl::setData(1024);
echo $dmc1 . '<br>';
echo $dmc2 . '<br>';
echo $dmc3 . '<br><br>';
?>

 DataModelControl [name=dmc1, data=256]
 DataModelControl [name=dmc2, data=256]
 DataModelControl [name=dmc3, data=256]

 DataModelControl [name=dmc1, data=1024]
 DataModelControl [name=dmc2, data=1024]
 DataModelControl [name=dmc3, data=1024]

... even better! Now, PHP creates one copy of $data, that is shared amongst all DataModelControl objects.
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