I was wondering if there is a way to load different folder based on php version. I could do it writing my own autoloader, but i was wondering if there is a way of using composer for that?
Ps. I have seen this in use before in module / plugin application that where redistributed globally to work with wide range of env. Those scripts where using own autoloading classes.
I am curios is there a way to use composer in similar way.
Scenario: class / folder structure:
class >
php5.6 >
- SomeClass.php
...
php7.x >
- SomeClass.php
...
php8.x >
- SomeClass.php
...
Compare php version and do something:
$classPathForAutoloader = '';
if (version_compare(PHP_VERSION, '8.0.0') >= 0) {
$classPathForAutoloader = 'php8.x';
// do something to composer autoload or
// use declaration
}else if(version_compare(PHP_VERSION, '7.0.0') >= 0){
$classPathForAutoloader = 'php7.x';
// do something to composer autoload or
// use declaration
}else if(version_compare(PHP_VERSION, '5.6.0') >= 0{
$classPathForAutoloader = 'php5.6';
// do something to composer autoload or
// use declaration
}else{
// throw Exception ...
}
standard composer setup:
{
"name": "some/name",
"require": {
},
"authors": [
{
"name": "Some Name",
"email": "[email protected]"
}
],
"autoload": {
"psr-4": {
"Devwl\\": "class/",
"Tools\\": "tools/"
},
"classmap": [
"class/"
],
"exclude-from-classmap": []
}
}
My Answer:
Unfortunately, Composer does not have built-in support for dynamically changing the autoload paths based on PHP version. However, you can achieve this by creating a custom autoloader that checks the PHP version and loads the appropriate class path.
Here's an example of how you can modify your Composer setup to use a custom autoloader:
1. Create a custom autoloader function that checks the PHP version and loads the appropriate class path:
php
function customAutoloader($class) {
$phpVersion = PHP_VERSION;
$classPathForAutoloader = '';
if (version_compare($phpVersion, '8.0.0') >= 0) {
$classPathForAutoloader = 'php8.x';
} else if (version_compare($phpVersion, '7.0.0') >= 0) {
$classPathForAutoloader = 'php7.x';
} else if (version_compare($phpVersion, '5.6.0') >= 0) {
$classPathForAutoloader = 'php5.6';
} else {
throw new Exception('Unsupported PHP version');
}
$classFile = __DIR__ . '/class/' . $classPathForAutoloader . '/' . $class . '.php';
if (file_exists($classFile)) {
require $classFile;
}
}
spl_autoload_register('customAutoloader');
2. Remove the existing autoload configuration from your Composer setup:
json
"autoload": {
"psr-4": {
"Devwl\\": "class/",
"Tools\\": "tools/"
},
"classmap": [
"class/"
],
"exclude-from-classmap": []
}
3. Make sure to include the custom autoloader in your project's entry point file (e.g., index.php):
php
require 'path/to/customAutoloader.php';
With this setup, the custom autoloader function will be responsible for loading classes based on the PHP version. You can adjust the logic in the custom autoloader function as needed to fit your specific requirements.
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