PHP最好的方法是生成大型数组

Question

I would like to generate a large array with a incremental key and empty value.

I tried:

$array = array();

for($i=1; $i <= 1000000; $i++)
   $array[$i] = '';

print_r($array);

thrown exception:

Fatal error:  Allowed memory size of 2097152 bytes exhausted (tried to allocate 131072 bytes)

What is the most efficient way?

Answer 1

To answer the title question, checkout the range function:

$a = range(0,9);
print_r($a);

Output:

Array
(
    [0] => 0
    [1] => 1
    [2] => 2
    [3] => 3
    [4] => 4
    [5] => 5
    [6] => 6
    [7] => 7
    [8] => 8
    [9] => 9
)

The issue you're having though is that you are running out of memory in php. Try increasing the memory limit if you really need an array that big.