(PECL quickhash >= Unknown)
QuickHashIntSet::exists — This method checks whether a key is part of the set
This method checks whether an entry with the provided key exists in the set.
keyThe key of the entry to check for whether it exists in the set.
示例 #1 QuickHashIntSet::exists() example
<?php
//generate 200000 elements
$array = range( 0, 199999 );
$existingEntries = array_rand( array_flip( $array ), 180000 );
$testForEntries = array_rand( array_flip( $array ), 1000 );
$foundCount = 0;
echo "Creating set: ", microtime( true ), "\n";
$set = new QuickHashIntSet( 100000 );
echo "Adding elements: ", microtime( true ), "\n";
foreach( $existingEntries as $key )
{
$set->add( $key );
}
echo "Doing 1000 tests: ", microtime( true ), "\n";
foreach( $testForEntries as $key )
{
$foundCount += $set->exists( $key );
}
echo "Done, $foundCount found: ", microtime( true ), "\n";
?>以上示例的输出类似于：
Creating set: 1263588703.0748 Adding elements: 1263588703.0757 Doing 1000 tests: 1263588703.7851 Done, 898 found: 1263588703.7897