本文介绍了为什么应该更喜欢 call_user_func_array 而不是常规调用函数?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
function foobar($arg, $arg2) {
echo __FUNCTION__, " got $arg and $arg2
";
}
foobar('one','two'); // OUTPUTS : foobar got one and two
call_user_func_array("foobar", array("one", "two")); // // OUTPUTS : foobar got one and two
正如我看到的常规方法和 call_user_func_array
方法都输出相同,那为什么要更喜欢它?
As I can see both regular one and call_user_func_array
method both outputs same, then why should one prefer it?
在哪种情况下,常规调用方法会失败而call_user_func_array
不会?
In which scenario regular calling method will fail but call_user_func_array
will not?
我能举出这样的例子吗?
Can I get any such example?
谢谢
推荐答案
您有一个包含不确定长度的函数参数的数组.
You have an array with the arguments for your function which is of indeterminate length.
$args = someFuncWhichReturnsTheArgs();
foobar( /* put these $args here, you do not know how many there are */ );
替代方案是:
switch (count($args)) {
case 1:
foobar($args[0]);
break;
case 2:
foobar($args[0], $args[1]);
break;
...
}
这不是解决方案.
这种用例可能很少见,但是当您遇到它时,您需要它.
The use case for this may be rare, but when you come across it you need it.
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