[英]Convert CamelCase to under_score_case in php __autoload()
PHP manual suggests to autoload classes like PHP手册建议自动加载类
function __autoload($class_name){
require_once("some_dir/".$class_name.".php");
}
and this approach works fine to load class FooClass
saved in the file my_dir/FooClass.php
like 并且这种方法可以很好地加载保存在my_dir/FooClass.php
文件中的类FooClass
class FooClass{
//some implementation
}
Question 题
How can I make it possible to use _autoload()
function and access FooClass
saved in the file my_dir/foo_class.php
? 如何才能使用_autoload()
函数并访问文件my_dir/foo_class.php
保存的FooClass
?
You could convert the class name like this... 你可以像这样转换类名...
function __autoload($class_name){
$name = strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $class_name));
require_once("some_dir/".$name.".php");
}
This is untested but I have used something similar before to convert the class name. 这是未经测试的,但我之前使用了类似的东西来转换类名。 I might add that my function also runs in O(n) and doesn't rely on slow backreferencing. 我可能会补充一点,我的函数也在O(n)中运行,并且不依赖于慢速反向引用。
// lowercase first letter
$class_name[0] = strtolower($class_name[0]);
$len = strlen($class_name);
for ($i = 0; $i < $len; ++$i) {
// see if we have an uppercase character and replace
if (ord($class_name[$i]) > 64 && ord($class_name[$i]) < 91) {
$class_name[$i] = '_' . strtolower($class_name[$i]);
// increase length of class and position
++$len;
++$i;
}
}
return $class_name;
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