生成php程序的php代码
一个.php文件,包含程序开始符(),具体代码则放置在开始符和结束符之间。为了方便日后修改和程序读取,习惯上代码应当按照一定的规定分行,而php代码必定少不了变量标记符($)。这些,都给生成.php文件带来一定的麻烦,处理它们需要一些变通方式。
我们先来处理php程序文件的开始符和结束符,这个不太复杂,我们用两个变量来表示它们:
$str_tmp="$str_end="?>"; //结束符。$str_end为独立变量。
下面来处理变量标记符($),设我们将在生成的.php文件里存在一个这样的变量等式:$age="28";。代码如下:
$str="$"."age=\"28\";\r\n";
上式里,打印变量 $str 将得到预期的效果。代码中,$和age要分开并用连接号(.)将其组合才能得到 $age 的效果;符号(\")表示小解双引号(");php代码一行结束要有分号(;);\r\n则表示打个回车另起一行。
以上我们解决了php代码起始符、结束符及代码变量标志和等式等输入问题,现在就可以具体进入生成.php文件的操作了。为了让程序看起来像个样子,我们预设一下即将生成的.php文件的内容:用户名(黑马)、登录密码(blackhorse)、年龄(28)、收入(4500)。以下是生成.php文件的完整代码:
//搜集资料
$str_tmp="$str_end="?>"; //php结束符
$str_tmp.="$"."name=\"黑马\";\r\n"; //加入用户名
$str_tmp.="$"."pass=\"blackhorse\";\r\n"; //加入密码
$str_tmp.="$"."age=\"28\";\r\n"; //加入年龄
$str_tmp.="$"."income=\"4500\";\r\n";
$str_tmp.=$str_end; //加入结束符
//保存文件
$sf="blhorse.php"; //文件名
$fp=fopen($sf,"w"); //写方式打开文件
fwrite($fp,$str_tmp); //存入内容
fclose($fp); //关闭文件
?>
把上述代码保存为一个名为 test.php 的文件,运行它,将得到 blhorse.php 文件,该文件的完整内容如下:
$name="黑马";
$pass="blackhorse";
$age="28";
$income="4500";
?>
可以看得出来,我们得到的是一个相当标准的.php配置类文件,完全符合我们的要求。至于要写更复杂的.php文件,只要像本文代码所显示的那样处理好变量的赋值和变量的累加,实现起来就变得相当容易。

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