Description:
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shmop_delete() function doesn't delete shared memory block.

The function returns true however the block is not deleted and one can still read/write to it and can not create a new one (shmop_open) with the same key.

Test script:
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$mid=shmop_open(1,'n',0644,128);
var_dump( shmop_delete($mid) );
var_dump( $mid );

$mid=shmop_open(1,'n',0644,128);
var_dump($mid);


Expected result:
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bool(true)
resource(4) of type (Unknown)
resource(5) of type (shmop)


Actual result:
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bool(true)
resource(4) of type (shmop)
PHP Warning:  shmop_open(): unable to attach or create shared memory segment 'No error' in test.php on line 6

bool(false)