What to do and do in php

Question

I have this code

$myNewClass->cars =& Orders_Car::GetRecords($myNewClass->searchString);
                   ^

what is doing there &. thank

Answer 1

Read Do Not Use PHP Links by PHP Expert Johannes Schluter

PHP links are a respite from PHP 4, where objects were passed by value, not by reference, unless you specifically made them by reference. This is not necessary when using PHP 5, because all objects are passed by reference to PHP 5 all the time.

Scalars and arrays are passed by default to PHP 5 by default. If you need to pass them by reference, you just need to use the object.

Answer 2

, . .

. .

- foreach.

, foreach .

$salad=array(1,2,3);
foreach ($salad as $leaf){
  $leaf+=1;
  }
echo $salad[0];// output: 1   

foreach ($salad as &$leaf){
  $leaf+=1;
  }
echo $salad[0];// output: 2 because & made the assignment affect the original array

Answer 3

He creates a link. If you do not know what a link is, read the following: http://www.php.net/manual/en/language.references.php

Answer 4

It is used to pass values ​​by reference, not by the default value used in php .