PHP Diff
A comprehensive library for get differences between two variables (array, object, string...)
Installation
php composer.phar require "pitpit/diff":"@dev"
Usage
Comparing string
$engine = new \Pitpit\Component\Diff\DiffEngine();
$diff = $engine->compare('test1', 'test2');
echo $diff->isModified();
Comparing objects
class MyClassToCompare
{
public $value;
public function __construct($value)
{
$this->value = $value;
}
public function getValue()
{
return $this->value;
}
}
$toCompare1 = new MyClassToCompare(4);
$toCompare2 = new MyClassToCompare(9);
$engine = new \Pitpit\Component\Diff\DiffEngine();
$diff = $engine->compare($toCompare1, $toCompare2);
//this closure iterate on each child properties and display where differences are
$trace = function($diff, $tab = '') use (&$trace) {
foreach ($diff as $element) {
$c = $element->isTypeChanged()?'T':($element->isModified()?'M':($element->isCreated()?'+':($element->isDeleted()?'-':'=')));
// print_r(sprintf("%s* %s [%s -> %s] (%s)\n", $tab, $element->getIdentifier(), is_object($element->getOld())?get_class($element->getOld()):gettype($element->getOld()), is_object($element->getNew())?get_class($element->getNew()):gettype($element->getNew()), $c));
print_r(sprintf("%s* %s [%s -> %s] (%s)\n", $tab, $element->getIdentifier(), gettype($element->getOld()), gettype($element->getNew()), $c));
if ($diff->isModified()) {
$trace($element, $tab . ' ');
}
}
};
Run the tests
Get and install composer: https://getcomposer.org/doc/00-intro.md#installation-nix
The resolve and download dependencies:
php composer.phar install
Run the tests:
phpunit