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How to set up configuration files in PHP

高洛峰
Release: 2016-10-21 11:09:15
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PHP设置配置文件的方法

变量 $config 是我们所提交过来的配置信息,是以数组形式存储的。

function set_config($config){
        if(!is_array($config)) return FALSE;
        $configfile = CONF_PATH.'config.php';
        if(!is_writable($configfile)) return('Please chmod ./config.inc.php to 0777 !');
        $pattern = $replacement = array();
        $str = file_get_contents($configfile);
        foreach($config as $k=>$v){
            $pattern[$k] = "/['\"]".strtoupper($k)."['\"]\s*=>\s*([']?)[^']*([']?)/is";
            $replacement[$k] = "'".strtoupper($k)."'=> \${1}".$v."\${2}";
        }
         
        $str = preg_replace($pattern, $replacement, $str);
        return file_put_contents($configfile, $str);
    }
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上面的$configfile 为文件的完整路径,也就是绝对路径。

通过file_get_contents文件获取配置文件的所有信息

再通过preg_replace方法把我们所修改,也是所提交过来的配置信息进行与原先的配置信息替换。

在通过file_put_contents把修改的所有信息替换了。


上面的方法不仅仅可以用在修改配置信息,还可以使用到修改任何文件


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