根据用户输入使用 ajax 即时更新 PHP 变量

Question

我快疯了，因为我想不通.. 我正在创建一个代码，告诉我将打印多少个面板。

PHP 代码是这样的：

<?php
$base = 400; //the width
$altezza = 300; //the height (no need for calculation)
$larg_fasce = 60; //the size of each piece (always 60cm)

$num_fasce = floor($base/$larg_fasce); //calc the numbers of piece needed to cover the $base
$dim_fasce = floor($base/$num_fasce); //calc the size of each piece

$resto = $base-($num_fasce*$larg_fasce); //calc the rest to cover the $base



/////////////
echo "Base: ".$base."<br>";
echo "Altezza: ".$altezza."<br>";
echo "Largh Fasce: ".$larg_fasce."<br><br>";

echo "Verranno fornite ".$num_fasce." fasce da ".$larg_fasce." cm - tot (".$num_fasce*$larg_fasce."cm)<br>";
if($resto != 0){
echo "Verra fornita 1 fascia da ".$resto." cm";
}

?>

此代码完美运行（当我手动调整 $base 大小时）。 我需要这个变量“$base”取自输入字段并实时更新，我该怎么做？

Answer 1

设置 $base = $_GET['base']，你的网址是这样的：test.php?base=400 它会很好用。

另一种方法是构建一个表单，它有一个让你输入$base，无论是通过post还是通过get，然后你就可以使用$base。

希望对你有所帮助~~

<?php
$base = $_GET['base']; //the width
$altezza = 300; //the height (no need for calculation)
$larg_fasce = 60; //the size of each piece (always 60cm)

$num_fasce = floor($base/$larg_fasce); //calc the numbers of piece needed to cover the $base
$dim_fasce = floor($base/$num_fasce); //calc the size of each piece

$resto = $base-($num_fasce*$larg_fasce); //calc the rest to cover the $base



/////////////
echo "Base: ".$base."<br>";
echo "Altezza: ".$altezza."<br>";
echo "Largh Fasce: ".$larg_fasce."<br><br>";

echo "Verranno fornite ".$num_fasce." fasce da ".$larg_fasce." cm - tot (".$num_fasce*$larg_fasce."cm)<br>";
if($resto != 0){
echo "Verra fornita 1 fascia da ".$resto." cm";
}

?>