这个问题比我们想象的要复杂。
如果满足某些条件，我需要从 php 调用 javascript 中的函数。
php 代码和 javascript 函数在同一个文件中。
我不需要生成java脚本函数的代码，因为在带参数的函数中完成是无效的，我还需要对函数的内容进行更改。
如何CreateSVG();在 php 代码中调用第 58 行？非常感谢。
我的完整文件如下所示：
<?php
require_once("includes/initialize.php");
?>
<!DOCTYPE html>
<html>
<head>
</script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
</head>
<body>
<div id="frame_shape">
<div id="main">
<h2>OOP Class Demo using PHP</h2>
<h2>Drawing shape usinig user parameteres.</h2>
<p>
Please enter two numbers to calculate the area of rectangle or tringle and press submit...
<p>
<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<br>width<input type=text name='width'>
<br>height<input type=text name='height'>
<h2>select shape</h2>
<input type="radio" name="shape" value="Rectangle" /> Rectangle
<br><input type="radio" name="shape" value="Tringle" /> Tringle
<br><input type="submit" name="submit" value="Submit Form"><br>
</form>
<br/><br/>
</div>
<div id="retangle">
<div id="svgContainer"></div>
</div>
<div id="Tringle"></div>
<div id="contener">
<?php
echo("<br>");
if (isset($_POST['submit'])) {
if (!empty($_POST['shape'])) {
if ($_POST['shape'] === 'Rectangle') {
// create object of rectangle and calculate it is area
$rect = new Rectangle ($_POST['width'], $_POST['height']);
echo 'rectangle of this size would have the area of ', $rect->GetArea(), "<br />";
//echo '<script type="text/javascript">', 'CreateSVG();', '</script>';
echo '<script>CreateSVG();</script>';
}
else if ($_POST['shape'] === 'Tringle'){
// create object of tringle and calculate it is area by extends
$tri = new Triangle ($_POST['width'], $_POST['height']);
echo 'triangle of this sizes would have the area of ', $tri->GetArea();
}
}
}
?>
</div>
</div>
<script>
$(document).ready(function() {
function CreateSVG(){
var xmlns = "http://www.w3.org/2000/svg";
var boxWidth = <?php echo $_POST['width'];?>;
var boxHeight = <?php echo $_POST['height'];?>;
alert(boxWidth + ' ' + boxHeight);
var svgElem = document.createElementNS (xmlns, "svg");
svgElem.setAttributeNS (null, "viewBox", "0 0 " + boxWidth + " " + boxHeight);
svgElem.setAttributeNS (null, "width", boxWidth);
svgElem.setAttributeNS (null, "height", boxHeight);
svgElem.style.display = "block";
var g = document.createElementNS (xmlns, "g");
svgElem.appendChild (g);
g.setAttributeNS (null, 'transform', 'matrix(1,0,0,-1,0,300)');
// draw linear gradient
var defs = document.createElementNS (xmlns, "defs");
var grad = document.createElementNS (xmlns, "linearGradient");
grad.setAttributeNS (null, "id", "gradient");
grad.setAttributeNS (null, "x1", "0%");
grad.setAttributeNS (null, "x2", "0%");
grad.setAttributeNS (null, "y1", "100%");
grad.setAttributeNS (null, "y2", "0%");
var stopTop = document.createElementNS (xmlns, "stop");
stopTop.setAttributeNS (null, "offset", "0%");
stopTop.setAttributeNS (null, "stop-color", "#ff0000");
grad.appendChild (stopTop);
var stopBottom = document.createElementNS (xmlns, "stop");
stopBottom.setAttributeNS (null, "offset", "100%");
stopBottom.setAttributeNS (null, "stop-color", "#0000ff");
grad.appendChild (stopBottom);
defs.appendChild (grad);
g.appendChild (defs);
// draw borders
var coords = "M 0, 0";
coords += " l 0, 300";
coords += " l 300, 0";
coords += " l 0, -300";
coords += " l -300, 0";
var path = document.createElementNS (xmlns, "path");
path.setAttributeNS (null, 'stroke', "#000000");
path.setAttributeNS (null, 'stroke-width', 10);
path.setAttributeNS (null, 'stroke-linejoin', "round");
path.setAttributeNS (null, 'd', coords);
path.setAttributeNS (null, 'fill', "url(#gradient)");
path.setAttributeNS (null, 'opacity', 1.0);
g.appendChild (path);
var svgContainer = document.getElementById ("svgContainer");
svgContainer.appendChild (svgElem);
}
});
</script>
</body>
</html>