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15 years ago
further I realized that an object, when getting detroyed, does care about destroying variable in object space visibility but not those in local visibility, be aware of the found pattern:



<?php

class release_test{

  private $buffer;

  private $other_object;

  public function __construct(){

    $this->other_object=new other_object_class();

  }

  public function __destruct(){

    //note that you always have to unset class objects, in order to get the resources released

    unset($this->other_object);

  }

  public allocate_mem_A(){

    $this->buffer=file("/tmp/bigfile");

  }

  public allocate_mem_B(){

    $buffer=file("/tmp/bigfile");

  }

  public allocate_mem_C(){

    $buffer=file("/tmp/bigfile");

    unset($buffer);

  }

  public allocate_mem_D(){

    $this->other_buffer=file("/tmp/bigfile");

  }

}



//this does not lead to a resource problem

$A=new release_test();

$A->allocate_mem_A();

$A->__destruct();

unset($A);



//this DOES lead to a resource problem

$B=new release_test();

$B->allocate_mem_B();

$B->__destruct();

unset($B);



//this does not lead to a resource problem

$C=new release_test();

$C->allocate_mem_C();

$C->__destruct();

unset($C);



//this does not lead to a resource problem

$D=new release_test();

$D->allocate_mem_D();

$D->__destruct();

unset($D);

?>
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