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@Tiriel
Created August 26, 2017 12:52
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Deep recursive comparing tool
<?php
class DeepCompare
{
/**
* Deep recursive comparison tool.
* Function ca be used as basis for comparison and update tool. Un-static function and add updating tools (setters)
*
* @param $var1
* @param $var2
* @return bool
*/
public static function compare($var1, $var2)
{
// If both vars are objects
if (is_object($var1) && is_object($var2)) {
return self::compareObject($var1, $var2);
}
// If both vars are arrays
if (is_array($var1) && is_array($var2)) {
return self::compareArray($var1, $var2);
}
// Compare scalar values
return self::compareScalar($var1, $var2);
}
/**
* @param $var1
* @param $var2
* @return bool
*/
public static function compareArray($var1, $var2)
{
if ($error= !is_array($var1) || !is_array($var2)) {
list($var, $type) = $error ? array(1, gettype($var1)) : array(2, gettype($var2));
throw new \InvalidArgumentException("Both variables must be arrays ({$type} given at parameter {$var}).");
}
// While array continues
while (!is_null(key($var1)) && !is_null(key($var2))) {
// Compare keys and values
if (key($var1)!==key($var2) || !self::compare(current($var1), current($var2))) {
return false;
}
// Move forward in array
next($var1); next($var2);
}
// If array was parsed without returning false
return is_null(key($var1)) && is_null(key($var2));
}
/**
* @param $var1
* @param $var2
* @return bool
*/
public static function compareObject($var1, $var2)
{
if ($error = !is_array($var1) || !is_array($var2)) {
list($var, $type) = $error ? array(1, gettype($var1)) : array(2, gettype($var2));
throw new \InvalidArgumentException("Both variables must be objects ({$type} given at parameter {$var}).");
}
// Compare classes
if (get_class($var1) !== get_class($var2)) {
return false;
}
// Retrieve properties
$refVar = new \ReflectionClass($var1);
// Parse properties
foreach($refVar->getProperties() as $property) {
$property->setAccessible(true);
$getter = 'get'.ucfirst($property->getName());
// Compare properties values
if(!self::compare($var1->$getter(), $var2->$getter()))
return false;
}
return true;
}
/**
* @param $var1
* @param $var2
* @return bool
*/
public static function compareScalar($var1, $var2)
{
if ($error = !is_scalar($var1) || !is_scalar($var2)) {
list($var, $type) = $error ? array(1, gettype($var1)) : array(2, gettype($var2));
throw new \InvalidArgumentException("Both variables must be scalar - integer, float, string or boolean ({$type} given at parameter {$var}).");
}
// Strict comparison between two vars
return $var1 === $var2;
}
}
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