Php Array key =>值搜索

Question

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HI我對PHP相當陌生。

我有一個數組

$ ARR =陣列（0 =>數組（ 'GID'=> 1， '組名'=> 「CAT1」， '成員'=>數組（0 =>數組（ ''''））， 1 => array（'GID'=> 11，'mname'=>'wwww'），1 => array（'mid'=> 12，'mname'=>'wswww'）） => 2， '組名'=> 「CAT2」， '成員'=>數組（0 =>數組（ '中'=> 13， 'MNAME'=> 'gggwwww'），1 =>數組（ '中' => 14，'mname'=>'wvvwww'）））， 2 => array（'GID'=> 3，'groupname'=>「cat1」，'members'=> array（0 => array '中'=> 15， 'MNAME'=> 'wwddsww'）），1 =>數組（ '中'=> 16， 'MNAME'=> 'wwwdddw'）））;

 ie...,I have GID,groupname,mid(member id),mname(member name).I want to insert a new mid and mname into a group if it is already in the array ,if it is not exists then create a new subarray with these elements..I also need to check a member id(mid) is also present.........................I used the code but its not working fine............. if (!empty($evntGroup)) { 


      foreach ($evntGroup as $k => $group) { 

       if ($group['GID'] == $group_id) { 
        foreach($group as $j=> $mem){ 

        if($mem['mid'] == $mem_id){ 

         unset($evntGroup[$k]['members'][$j]['mid']); 
         unset($evntGroup[$k]['members'][$j]['mname']); 
        } 
        else{ 


        $evntGroup[$k]['members'][] = array(
         'mid' => $mem_id, 
         'mname' => $mem_name); 

        }} 
       } else { 


        $evntGroup[] = array(
         'GID' => $group_id, 
         'groupname' => $Group['event_group_name'], 
         'members' => array(
          0 => array(
           'mid' => $mem_id, 
           'mname' => $mem_name 
          ) 
         ) 
        ); 

       } 

      } 
     } else { 

      $evntGroup[$i]['GID'] = $group_id; 
      $evntGroup[$i]['groupname'] = $Group['event_group_name']; 
      $evntGroup[$i]['members'][] = array(
       'mid' => $mem_id, 
       'mname' => $mem_name); 
      $i++; 

     } 

Answer 1

在函數的形式，最簡單的解決方案將是這個樣子：

function isGidInArray($arr, $val) { 
    foreach($arr as $cur) { 
     if($cur['GID'] == $val) 
      return true; 
    } 
    return false; 
} 

你更新你的問題來指定要如果指定的GID被發現怎麼辦，但是這只是一個簡單的除循環：

function doSomethingIfGidInArray($arr, $val) { 
    foreach($arr as $cur) { 
     if($cur['GID'] == $val) { 
      doSomething(); 
      break; //Assuming you only expect one instance of the passed value - stop searching after it's found 
     } 
    } 
} 

有不幸的是，這將父陣列內檢索每個數組的索引相同沒有本地PHP陣列功能。我經常想要這樣的事情。如果GID等於

Answer 2

像這樣將匹配3：

foreach($arr as $item) { 
    if($item['GID'] == 3) { 
    // matches 
    } 
} 

Answer 3

有代碼

function updateByGid(&$array,$gid,$groupname,$mid,$mname) { 
    //For each element of the array 
    foreach ($array as $ii => $elem) { 
     //If GID has the same value 
     if ($elem['GID'] == $gid) { 
      //Insert new member 
      $array[$ii]['members'][]=array(
         'mid'=>$mid, 
         'mname'=>$mname); 
      //Found! 
      return 0; 
     } 
    }  
    //If not found, create new 
    $array[]=array(
      'GID'=>$gid, 
      'groupname'=>$groupname, 
      'members'=>array(
       0=>array(
        'mid'=>$mid, 
        'mname'=>$mname 
       ) 
      ) 
    ); 

    return 0; 
}