end()

(PHP 4, PHP 5, PHP 7)

将数组的内部指针指向最后一个单元

说明

end()将$array的内部指针移动到最后一个单元并返回其值。

参数

这个数组。该数组是通过引用传递的，因为它会被这个函数修改。这意味着你必须传入一个真正的变量，而不是函数返回的数组，因为只有真正的变量才能以引用传递。

返回值

返回最后一个元素的值，或者如果是空数组则返回FALSE。

范例

Example #1end()例子

参见

• current()返回数组中的当前单元
• each()返回数组中当前的键／值对并将数组指针向前移动一步
• prev()将数组的内部指针倒回一位
• reset()将数组的内部指针指向第一个单元
• next()将数组中的内部指针向前移动一位

It's interesting to note that when creating an array with numeric keys in no particular order, end() will still only return the value that was the last one to be created. So, if you have something like this:
  
This will print "0".

If you need to get a reference on the first or last element of an array, use these functions because reset() and end() only return you a copy that you cannot dereference directly:

This function returns the value at the end of the array, but you may sometimes be interested in the key at the end of the array, particularly when working with non integer indexed arrays:

Usage example:

Attempting to get the value of a key from an empty array through end() will result in NULL instead of throwing an error or warning becuse end() on an empty array results in false:

Results in:
string(2) "c1"
NULL
NULL

If all you want is the last item of the array without affecting the internal array pointer just do the following:

This works because the parameter to the function is being sent as a copy, not as a reference to the original variable.

I found that the function end() is the best for finding extensions on file name. This function cleans backslashes and takes the extension of a file.