值格式刪除CARACTERES

Question

我有這個值：

「24.7公里」

我想刪除「公里」，只有獲得24.7的浮點數！有人知道我該怎麼做？感謝很多提前

這裏我的代碼actualy：

Route::get('/test', function() { 

    $origin = '155 avenue franklin roosevelt 11000 Carcassonne'; 

    $destination = '36 avenue André Chenier 11300 Limoux'; 

    $response = \GoogleMaps::load('directions') 
     ->setParam([ 
      'origin'   => $origin, 
      'destination'  => $destination, 
      'mode' => 'driving' , 
      'language' => 'fr', 

     ])->get(); 



    $parsed_json = (json_decode($response)); 


    $distance = $parsed_json->{'routes'}[0]->{'legs'}[0]->{'distance'}->{'text'}; 

    dd($distance); 

更新工作：

$parsed_json = (json_decode($response)); 


     $distance = $parsed_json->{'routes'}[0]->{'legs'}[0]->{'distance'}->{'text'}; 


     $a = $distance; 
     $b = str_replace(" km",'',$a); 
     $c = str_replace(",",'.',$b); 

     dd($c); 

Answer 1

$a = "24,7 km"; 
$b = str_replace(" km",'',$a); 
$c = str_replace(",",'.',$b);