AppendIterator::__construct()

(PHP 5>=5.1.0,PHP 7)

Constructs an AppendIterator

说明

Constructs an AppendIterator.

参数

此函数没有参数。

返回值

没有返回值。

范例

Example#1 Iterating AppendIterator with foreach

以上例程会输出：

0 => Margarita
1 => Siciliana
2 => Hawaii
0 => Cheese
1 => Anchovies
2 => Olives
3 => Pineapple
4 => Ham

Example#2 Iterating AppendIterator with the AppendIterator API

以上例程会输出：

0 => 0 => Margarita
0 => 1 => Siciliana
0 => 2 => Hawaii
1 => 0 => Cheese
1 => 1 => Anchovies
1 => 2 => Olives
1 => 3 => Pineapple
1 => 4 => Ham

注释

When usingiterator_to_array()to copy the values of the AppendIterator into an array,you have to set the optional$use_keyargument toFALSE.When$use_keyis notFALSEany keys reoccuring in inner iterators will get overwritten in the returned array.There is no way to preserve the original keys.

参见

• AppendIterator::append() Appends an iterator

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