各php工作原理图：
以下是扯代码时间：
<?<span>php</span><span>//</span><span>配置文件信息</span><span>define</span>("HOST","localhost"); <span>//</span><span>主机名</span><span>define</span>("USER","rootaaaa"); <span>//</span><span>用户名</span><span>define</span>("PASSWORD","root123456"); <span>//</span><span>密码</span><span>define</span>("DBNAME","mydb"); <span>//</span><span>数据库名</span>
dbconfig.php
<?<span>php</span><span>//</span><span>执行配置文件的修改操作//1.读取配置文件的信息</span><span>$info</span> = <span>file_get_contents</span>("dbconfig.php"<span>);</span><span>//</span><span>2.对POST遍历，并对配置文件信息进行正则替换</span><span>foreach</span>(<span>$_POST</span><span>as</span><span>$k</span> => <span>$v</span><span>){ </span><span>$info</span>=<span>preg_replace</span>("/define\(\"{<span>$k</span>}\",\"(.*?)\"\)/","define(\"{<span>$k</span>}\",\"{<span>$v</span>}\")",<span>$info</span><span>);}</span><span>//</span><span>3.将替换后的信息写回到配置文件中</span><span>file_put_contents</span>("dbconfig.php",<span>$info</span><span>);</span><span>echo</span> "<h2>修改成功!</h2>"<span>;</span><span>echo</span> "返回";
doupdate.php
<?<span>php</span><span>//</span><span>编辑配置文件</span><span>$keyinfo</span>=<span>array</span>("HOST"=>"主机","USER"=>"用户","PASSWORD"=>"密码","DBNAME"=>"数据库名"<span>);</span><span>//</span><span>1.读取配置文件的信息</span><span>$info</span> = <span>file_get_contents</span>("dbconfig.php");<span>//</span><span>将dbconfig.php文件中信息读出并赋值给info变量//2.使用正则表达式解析配置文件的信息</span><span>preg_match_all</span>("/define\(\"(.*?)\",\"(.*?)\"\)/",<span>$info</span>,<span>$a<div style="color:transparent">！本文来源gaodai.ma#com搞#代!码(网</div><em>搞gaodaima代码</em></span>);<span>//</span><span>将info中的信息解析到a变量中存储//3.遍历解析后的信息，并输出到修改表单中</span><span>echo</span> "<h2>编辑配置文件</h2>"<span>;</span><span>echo</span> ""<span>;</span><span>foreach</span>(<span>$a</span>[1] <span>as</span><span>$k</span> =><span>$v</span><span>){ </span><span>echo</span> "{<span>$keyinfo</span>[<span>$v</span>]}:<input type='text' name='{<span>$v</span>}' value='{<span>$a</span>[2][<span>$k</span>]}' /><br /><br />"<span>;}</span><span>echo</span> " "<span>;</span><span>echo</span> ""<span>;</span><span>echo</span> "";
edit.php
以上就介绍了PHP基础示例：用正则表达式修改配置信息，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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转载请注明原文链接：PHP基础示例：用正则表达式修改配置信息
转载请注明原文链接：PHP基础示例：用正则表达式修改配置信息
