PHP Basic Example: Modifying configuration information with regular expressions

Each PHP working principle diagram:

Here is the time to pull the code:

 
  PHP/ /config file information define// hostname define("USER", "rootaaaa");      // User name Define ("PASSWORD", "root123456");  // Password Define ("DBNAME", "mydb");    // Database name

dbconfig.php

 
  PHP// Execute configuration file modification operation//1. Read the configuration file information $infofile_get_contents("dbconfig.php"); // 2. Post traversal, and regular substitution of profile information foreach ($_postas$k$v) {    $info=preg_replace ("/define\ (\" {$k}\ ", \" (. *?) \ "\)/", "define (\" {$k}\ ", \" {$v}\ ")",$info);} // 3. Write the replacement information back into the configuration file file_put_contents ("dbconfig.php",$info); Echo "
Modified successfully!
"; Echo "Return";

doupdate.php

 
  PHP// Edit configuration file $keyinfo=array("host" + "hosts", "User" + "users", "PASSWORD" and "=" Password "," DBNAME "=" database name "); // 1. Read the configuration file information $info file_get_contents ("dbconfig.php"); // the information in the dbconfig.php file is read out and assigned to the info variable//2. Using regular expressions To resolve configuration file information Preg_match_all ("/define\" (. *?) \",\"(.*?) \ "\)/",$info,$a); // parses the information in info into the A variable to store//3. Iterates through the parsed information and outputs it to the modification form Echo "
Editing a configuration file
"; Echo "";

edit.php

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