PHP Sequential Lookup and two-point lookup sample

  This article mainly introduces the PHP sequential lookup and two-point search examples, the need for friends can refer to the following

  Code as follows: <?php   class Search { //lookup source array  private $array = Array (1,2,3,5,7,6,4,8);    /* *   * Sequential lookup   * @param $val value to find  / public function Query_search ($val)  {  foreach ($th Is->array as $k => $v)   {   if ($v = = $val)    {    Echo ' Order find success! '   &NBS P Exit (0);   &NBSP}  }     echo ' Order lookup failed! '; &NBSP}    /**   * Binary search method   * @param $val value to find  / public function Bin_search ($val)   {  sort ($this->array)     $min = 0   $max = count ($this->array);     for ($i = $min ; $i < $max; $i + +)   {    $mid = Ceil (($min + $max)/2)      if ($val = $this->array[$mid])   & nbsp {    echo ' binary find success! ';     exit (0);    }    else if ($val < $this->array[$mid] )    {    $max = $mid;    }   else if ($val > $this->array[$mid])    {    $min = $mid;    }  } &N Bsp   Echo ' Two-point lookup failed! ' &NBSP}}