array_fill()

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

用给定的值填充数组

说明

array_fill()用$value参数的值将一个数组填充$num个条目，键名由$start_index参数指定的开始。

参数

返回的数组的第一个索引值。

如果$start_index是负数，那么返回的数组的第一个索引将会是$start_index，而后面索引则从0开始。(参见例子)。

插入元素的数量。必须大于或等于 0。

用来填充的值。

返回值

返回填充后的数组。

错误／异常

如果$num小于零，将会抛出E_WARNING。

更新日志

范例

Example #1array_fill()例子

以上例程会输出：

Array
(
    [5]  => banana
    [6]  => banana
    [7]  => banana
    [8]  => banana
    [9]  => banana
    [10] => banana
)
Array
(
    [-2] => pear
    [0] => pear
    [1] => pear
    [2] => pear
)

注释

参见手册上数组一节里关于负数的键的详细解释。

参见

• array_fill_keys() 使用指定的键和值填充数组
• str_repeat() 重复一个字符串
• range() 根据范围创建数组，包含指定的元素

This is what I recently did to quickly create a two dimensional array (10x10), initialized to 0:

This should work for as many dimensions as you want, each time passing to array_fill() (as the 3rd argument) another array_fill() function.

If you need negative indices:

Here is result of the code above:
Array
(
  [-2] => pear
  [0] => pear
  [1] => pear
  [2] => pear
)
Array
(
  [-2] => pear
  [-1] => pear
  [0] => pear
  [1] => pear
)

Using objects with array_fill may cause unexpected results. Consider the following:

Objects are filled in the array BY REFERENCE. They are not copied for each element in the array.

I made this function named "array_getMax" that returns te maximum value and index, from array:

I hope some one find this usefull

Fill missing keys in a (numerically-indexed) array with a default value 

array_fill() cannot be used to setup only missing keys in an array. This may be necessary for example before using implode() on a sparse filled array.
The solution is to use this function:

This is usefull in some situations where you don't know which key index was filled and you want to preserve the association between a positioned field in an imploded array and the key index when exploding it.

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