(PECL quickhash >= Unknown)
QuickHashIntStringHash::__construct — Creates a new QuickHashIntStringHash object
This constructor creates a new QuickHashIntStringHash. The size is the amount of bucket lists to create. The more lists there are, the less collisions you will have. Options are also supported.
size
The amount of bucket lists to configure. The number you pass in will be
automatically rounded up to the next power of two. It is also
automatically limited from 64 to 4194304.
options
The options that you can pass in are: QuickHashIntStringHash::CHECK_FOR_DUPES,
which makes sure no duplicate entries are added to the hash;
QuickHashIntStringHash::DO_NOT_USE_ZEND_ALLOC to not use PHP's internal memory
manager as well as one of QuickHashIntStringHash::HASHER_NO_HASH,
QuickHashIntStringHash::HASHER_JENKINS1 or QuickHashIntStringHash::HASHER_JENKINS2.
These last three configure which hashing algorithm to use. All options
can be combined using bitmasks.
Returns a new QuickHashIntStringHash object.
示例 #1 QuickHashIntStringHash::__construct() example
<?php
var_dump( new QuickHashIntStringHash( 1024 ) );
var_dump( new QuickHashIntStringHash( 1024, QuickHashIntStringHash::CHECK_FOR_DUPES ) );
var_dump(
new QuickHashIntStringHash(
1024,
QuickHashIntStringHash::DO_NOT_USE_ZEND_ALLOC | QuickHashIntStringHash::HASHER_JENKINS2
)
);
?>