PHP技术摸索
我感觉比起大多数成熟的商用web技术,PHP显得很朴实,这是第一印象。虽然和vbscript有点相似的感觉,但少深入后发现,PHP还是很严谨的,起码他在朝着这个方向发展。现今比较流行的是PHP+MYSQL+FLASH,呵呵,FLASH看上去跟他们有点格格不入,不过看过不少台湾人做FLASH RIA 的时候用的都是这个模式。所以就利用点时间学学PHP,感觉还不错,我用的环境是EasyPHP1.8,我一直觉得叫easy的就是最好的。这个开发平台整合了apache,mysql,php和phoadmin省了很多的麻烦。直接上手调程序。不过没有错误跟踪和调试模式,只能看报错改代码了。听说有PHP的IDE,哪位推荐一个。学习的过程中看到了一个小例子,由于是图形图像处理相关的。自然就很有兴趣了。下面就来说说这个例子。
PHP有了一个GD库后,不仅可以处理图像,甚至还能生成图像。真是流氓会武术,谁也挡不住啊。核心代码很短,就这些了:
Header("Content-type: image/gif");
$string=implode($argv," ");
$im = imagecreatefromgif("images/button1.gif");
$orange = ImageColorAllocate($im, 220, 210, 60);
$px = (imagesx($im)-7.5*strlen($string))/2;
ImageString($im,3,$px,9,$string,$orange);
ImageGif($im);
ImageDestroy($im);
?>
这段代码在其他页面中通过以下标记调用,然后以上的那段button.php代码取得text值并在另外取得的图像文件中加上该值--在以上的代码中该图像文件是images/button1.gif--最后输出到浏览器。假如你想在表单域中使用图像按钮,但是又不希望在每次按钮上的文字改变后不得不重新生成新的图像,就可以利用这样简单的方法动态生成图像文件。说白了,就是往背景图上加字。这可有用了,数据库和页面显示连起来,灵活性就打了很多,SKIN的编辑设置也有新方法。以前在asp.net里干过这种事,没想到PHP轻松几行就实现了。PHP同样也支持面向对象,但感觉他很人性化,作为一个免费平台,在很大程度上免去了繁琐的设计,简单明了地实现了动态网页并能提供很好的底层支持,比如还是说对FLASH。

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