PHP房贷计算器实例代码,等额本息,等额本金

debx();      function debx()   {     $dkm   = 240; //贷款月数，20年就是240个月     $dkTotal = 10000; //贷款总额     $dknl  = 0.0515; //贷款年利率     $emTotal = $dkTotal * $dknl / 12 * pow(1 + $dknl / 12, $dkm) / (pow(1 + $dknl / 12, $dkm) - 1); //每月还款金额     $lxTotal = 0; //总利息     for ($i = 0; $i < $dkm; $i++) {       $lx   = $dkTotal * $dknl / 12;  //每月还款利息       $em   = $emTotal - $lx; //每月还款本金       echo "第" . ($i + 1) . "期", " 本金:", $em, " 利息:" . $lx, " 总额:" . $emTotal, "<br />";       $dkTotal = $dkTotal - $em;       $lxTotal = $lxTotal + $lx;     }     echo "总利息:" . $lxTotal;   }         function debj()   {     $dkm   = 240; //贷款月数，20年就是240个月     $dkTotal = 10000; //贷款总额     $dknl  = 0.0515; //贷款年利率           $em   = $dkTotal / $dkm; //每个月还款本金     $lxTotal = 0; //总利息     for ($i = 0; $i < $dkm; $i++) {       $lx   = $dkTotal * $dknl / 12; //每月还款利息       echo "第" . ($i + 1) . "期", " 本金:", $em, " 利息:" . $lx, " 总额:" . ($em + $lx), "<br />";       $dkTotal -= $em;       $lxTotal = $lxTotal + $lx;     }     echo "总利息:" . $lxTotal;   }         exit;