QuickHashIntHash::exists

(PECL quickhash >= Unknown)

QuickHashIntHash::exists — This method checks whether a key is part of the hash

说明

public bool QuickHashIntHash::exists ( int $key )

This method checks whether an entry with the provided key exists in the hash.

参数

key: The key of the entry to check for whether it exists in the hash.

返回值

Returns TRUE when the entry was found, or FALSE when the entry is not found.

范例

Example #1 QuickHashIntHash::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 hash: " ,  microtime (  true  ),  "\n" ;
 $hash  = new  QuickHashIntHash (  100000  );
echo  "Adding elements: " ,  microtime (  true  ),  "\n" ;
foreach(  $existingEntries  as  $key  )
{
      $hash -> add (  $key ,  56  );
}

echo  "Doing 1000 tests: " ,  microtime (  true  ),  "\n" ;
foreach(  $testForEntries  as  $key  )
{
      $foundCount  +=  $hash -> exists (  $key  );
}
echo  "Done,  $foundCount  found: " ,  microtime (  true  ),  "\n" ;
 ?>

以上例程的输出类似于：

Creating hash: 1263588703.0748
Adding elements: 1263588703.0757
Doing 1000 tests: 1263588703.7851
Done, 898 found: 1263588703.7897