将数字强制保留两位小数

<? 
 // 1.number_format   
 $number = 1234.5678;   
 $nombre_format_francais = number_format($number, 2, ',', ' ');   
  // 1 234,57   
 $english_format_number = number_format($number, 2, '.', '');   
  // 1234.57   
       
  //2.round  
  $number = 1234.5678;   
   echo round($number ,2);    
  //1234.57   
     
   //3.sprintf    
    $formatted = sprintf ("%s有￥%01.2f。",$name, $money);    
    echo $formatted;      
   //张三有￥123.10。 
?>