php数组处置

php数组处理
array(4) {
  [0] => array(3) {
  ["Id"] => string(2) "24"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(3) "157"
  }
  [1] => array(3) {
  ["Id"] => string(2) "22"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(3) "176"
  }
  [2] => array(3) {
  ["Id"] => string(1) "4"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(2) "25"
  }
  [3] => array(3) {
  ["Id"] => string(1) "1"
  ["FromMid"] => string(2) "25"
  ["ToMid"] => string(3) "157"
  }
}

我想把["FromMid"]==["ToMid"]&&["ToMid"]==["FromMid"]处理掉 只留一条
得出的结果应该是
array(4) {
  [0] => array(3) {
  ["Id"] => string(2) "24"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(3) "157"
  }
  [1] => array(3) {
  ["Id"] => string(2) "22"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(3) "176"
  }
  [2] => array(3) {
  ["Id"] => string(1) "4"
  ["FromMid"] => string(3) "157"
  ["ToMid"] => string(2) "25"
  }
}

------解决方案--------------------

PHP code

<?php $input = array("red", "green", "blue", "yellow");array_splice($input, 2);// $input is now array("red", "green")$input = array("red", "green", "blue", "yellow");array_splice($input, 1, -1);// $input is now array("red", "yellow")$input = array("red", "green", "blue", "yellow");array_splice($input, 1, count($input), "orange");// $input is now array("red", "orange")$input = array("red", "green", "blue", "yellow");array_splice($input, -1, 1, array("black", "maroon"));// $input is now array("red", "green",//          "blue", "black", "maroon")$input = array("red", "green", "blue", "yellow");array_splice($input, 3, 0, "purple");// $input is now array("red", "green",//          "blue", "purple", "yellow");?><br><font color="#e78608">------解决方案--------------------</font><br>

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PHP code

$data = array(    array("Id" =&gt; "24", "FromMid" =&gt; "157", "ToMid" =&gt; "157"),    array("Id" =&gt; "22", "FromMid" =&gt; "157", "ToMid" =&gt; "176"),    array("Id" =&gt; "4", "FromMid" =&gt; "157", "ToMid" =&gt; "25"),    array("Id" =&gt; "1", "FromMid" =&gt; "25", "ToMid" =&gt; "157"));$markList = array();foreach ($data as $key =&gt; $val) {    $posi = md5($val['FromMid'] . $val['ToMid']);    $anti = md5($val['ToMid'] . $val['FromMid']);    if (isset($markList[$posi]) || isset($markList[$anti])) {        unset($data[$key]);    } else {        $markList[$posi] = $markList[$anti] = 1;    }}echo '<pre class="brush:php;toolbar:false;">';print_r($data);/**输出：Array(    [0] =&gt; Array        (            [Id] =&gt; 24            [FromMid] =&gt; 157            [ToMid] =&gt; 157        )    [1] =&gt; Array        (            [Id] =&gt; 22            [FromMid] =&gt; 157            [ToMid] =&gt; 176        )    [2] =&gt; Array        (            [Id] =&gt; 4            [FromMid] =&gt; 157            [ToMid] =&gt; 25        )*/<div class="clear"></div>

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