引用定位

时间：2011-05-16 15:55:57 来源：站内作者：潘春会

=== $data));

      //Undo our changes ...
      unset($a->$key);

    }elseif(is_resource($a)){

      if(get_resource_type($a) !== get_resource_type($b))return false;
      $same = ((string) $var1) === ((string) $var2);

    }else{

      if($a !== $b) return false;

      //To check for a reference of a variable with simple type
      //simply store its old value and check against modifications of the second variable ;-)

      $data = uniqid("is_ref_", true);
      while($data === $a) $data = uniqid("is_ref_", true);

      $save = $a;    //WE NEED A COPY HERE!!!
      $a = $data; //Set a to the value of $data (copy)
      $same = ($a === $b); //Check if $var2 was modified too ...
      $a = $save; //Undo our changes ...

    }
    return $same;
}
?>

Steve Clay (06-Apr-2007 09:24)

BenBE's function is broken for testing objects. Here's a variation on it just for testing objects:



<?php

function same_obj(&$var1, &$var2) {

    if ($var1 !== $var2) {

        return false;
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