- PHP 手册
- 函数参考
- 变量与类型相关扩展
- Quickhash
- QuickHashIntHash
QuickHashIntHash::loadFromString
(PECL quickhash >= Unknown)
QuickHashIntHash::loadFromString — This factory method creates a hash from a string
说明
public static QuickHashIntHash::loadFromString ( string$contents
[, int $options
] ) : QuickHashIntHash
This factory method creates a new hash from a definition in a string. The file format consists of 32 bit signed integers packed together in the Endianness that the system that the code runs on uses. For each element there are two 32 bit signed integers stored. The first of each element is the key, and the second is the value belonging to the key.
参数
-
contents -
The string containing a serialized format of the hash.
-
options -
The same options that the class' constructor takes; except that the size option is ignored. It is automatically calculated to be the same as the number of entries in the hash, rounded up to the nearest power of two with a maximum limit of 4194304.
返回值
Returns a new QuickHashIntHash.
范例
Example #1 QuickHashIntHash::loadFromString() example
<?php
$contents = file_get_contents( dirname( __FILE__ ) . "/simple.hash" );
$hash = QuickHashIntHash::loadFromString(
$contents,
QuickHashIntHash::DO_NOT_USE_ZEND_ALLOC
);
foreach( range( 0, 0x0f ) as $key )
{
printf( "Key %3d (%2x) is %s\n",
$key, $key,
$hash->exists( $key ) ? 'set' : 'unset'
);
}
?>
以上例程的输出类似于：
Key 0 ( 0) is unset Key 1 ( 1) is set Key 2 ( 2) is set Key 3 ( 3) is set Key 4 ( 4) is unset Key 5 ( 5) is set Key 6 ( 6) is unset Key 7 ( 7) is set Key 8 ( 8) is unset Key 9 ( 9) is unset Key 10 ( a) is unset Key 11 ( b) is set Key 12 ( c) is unset Key 13 ( d) is set Key 14 ( e) is unset Key 15 ( f) is unset
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/quickhashinthash.loadfromstring.php