Two methods of modifying configuration files in PHP

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introduction

We are PHP During the development process, there are often scenarios that need to modify the configuration file , This article will introduce two methods to modify the configuration file , If there is any deficiency , Welcome to point out ！

Text

   Let's assume that there is such a configuration file （ Other formats are also similar , The code can be changed slightly ）

config.php

<?php
return [
	'name' => ' funny mc',
	'password' => '123456',
	'app' => 'CSDN',
	'language' => 'PHP',
];

Method 1

   We can get the contents of the configuration file first , Then replace the corresponding configuration item with a regular expression , The specific implementation is as follows

index.php

<?php
/** $name： Configuration item name  $value： Modified value  */
function setConfig($name,$value) {
    
	$content = file_get_contents('config.php');
	$content = preg_replace("/'{
      $name}' => .+,/","'{
      $name}' => '{
      $value}',",$content);
	file_put_contents($file,$content);
}

Let's analyze the advantages and disadvantages of this method

• advantage ： The code is simple , Easy to operate （ I can't make it up , Forgive me, …）
• shortcoming ：
  1. The format of each line must be the same （ Include quotation mark types 、 Number of spaces, etc ）, Otherwise, regular expressions will be more complex , Difficult to write
  2. It may hurt by mistake （ In case the content of a configuration item is exactly the same as the configuration format , Although the odds are small ）

Test code

index.php

//...TODO
setConfig('name','HuajiMC');

result

config.php

//...
	'name' => 'HuajiMC',
//...

If you want to modify multiple values at once , You can modify （ Not listed below ）

index.php

<?php
/** $configs： Configuration array （ Format ：{ Project name : Modified value }） */
function setConfig($configs){
    
	$content = file_get_contents('config.php');
	foreach($configs as $name => $value) {
    
		$content = preg_replace("/'{
      $name}' => .+,/","'{
      $name}' => '{
      $value}',",$content);
	}
	file_put_contents($file,$content);
}

Method 2

   We can get the configuration array , Modify configuration items through arrays , Then convert the array to configuration file format , The specific implementation is as follows

index.php

<?php
function setConfig($name,$value) {
    
	$configs = require 'config.php'; // Get configuration array 
	$configs[$name] = $value; // Modify configuration item 
	$text = ''; // Loop to turn the configuration array into text 
	foreach($configs as $name => $value) {
    
		$text .= " '{
      $name}' => '{
      $value}',\n";
	}
	$content = <<<EOF <?php return [ {
      $text} ]; EOF;
	file_put_contents('config.php',$content);
}

• advantage ：
  1. The configuration format does not have to be consistent , As long as it conforms to the array syntax
  2. The code is simple , Easy to operate （ Make up …）
• shortcoming ： Because the configuration file is automatically generated by the loop , So there's something extra （ As noted ） It may be difficult to keep

The test results are normal , No more writing here , Try it on your own ～

Conclusion

   These two methods have their own advantages or disadvantages , You can choose the corresponding method according to the actual situation , If you have better methods or modification opinions , Welcome to leave a message in the comment area .

author ： funny MC